Tuesday, October 26, 2010

SAMSUNG Error Code Model ACC2400C and ACC2800C

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Samsung error code model ACC2400C and ACC2800C

Error Code = *1
Meaning = Indoor unit thermistor sensor error
Checking area = - Indoor unit thermistor sensor -PCB of the indoor unit

Error Code = *5
Meaning = Indoor unit pipe thermistor sensor error
Checking area = - Indoor unit pipe thermistor sensor - PCB of the indoor unit

Error Code = *6
Meaning = Outdoor unit thermistor sensor error
Checking area = - Outdoor unit thermistor sensor - PCB of the outdoor unit

Error Code = *9
Meaning = Float switch error
Checking area = - Drain pump, Float switch - Drain system - DIP switch(SW2) of the indoor unit (The No.2 and No.4 switches must beat “ON” position.)

Error Code = *A
Meaning = A Indoor and Outdoor communication error
Checking area = - Communication cables of indoor and outdoor units - PCB of indoor and outdoor units

Error Code = *C
Meaning = Wired remote controller communication error
Checking area = - Wired remote controller cables, Wired remote controller - Main/Sub PCB of the indoor unit

Error Code = *D
Meaning = Outdoor pipe thermistor sensor error
Checking area = - Outdoor pipe thermistor sensor - PCB of the outdoor unit

* The asterisk mark “ * ” + “ERROR” CODE of wired remote controller stands for the set number.
ex) ERROR CODE “39” is the FLOAT SWITCH OPEN ERROR of SET no.3.


Trouble shooting by outdoor unit error code

ERROR CODE = E1
ERROR DESCRIPTION = Indoor unit room thermistor error
REFERENCE PART = EC01

ERROR CODE = E5
ERROR DESCRIPTION = Indoor unit pipe thermistor error
REFERENCE PART = EC02

ERROR CODE = E6
ERROR DESCRIPTION = Outdoor unit thermistor error
REFERENCE PART = EC03

ERROR CODE = E9
ERROR DESCRIPTION = Float switch open error
REFERENCE PART = EC04

ERROR CODE = EA
ERROR DESCRIPTION = Communication error between indoor unit and outdoor unit
REFERENCE PART = EC05

ERROR CODE = EC
ERROR DESCRIPTION = Communication error between wired remote controller and indoor unit
REFERENCE PART = EC06

ERROR CODE = ED
ERROR DESCRIPTION = Outdoor unit pipe thermistor error
REFERENCE PART = EC07

ERROR CODE = EL
ERROR DESCRIPTION = Reverse power of 3 phase power source detected (3 phase model)
REFERENCE PART = EC08

Trouble shooting by indoor unit receive board

ERROR CODE = Reservation LED flickering(1Hz period)
ERROR DESCRIPTION = Indoor temperature sensor abnormal
REFERENCE PART = EC01

ERROR CODE = Operation LED and reservation LED flickering (1Hz period)
ERROR DESCRIPTION = Indoor pipe temperature sensor abnormal
REFERENCE PART = EC02

ERROR CODE = Operation LED and filter LED flickering (1Hz period)
ERROR DESCRIPTION = Outdoor temperature sensor abnormal
REFERENCE PART = EC03

ERROR CODE = Reservation LED filter LED alternating flickering (1Hz period)
ERROR DESCRIPTION = Float switch open abnormal
REFERENCE PART = EC04

ERROR CODE = Reservation LED and filter LED flickering (1Hz period)
ERROR DESCRIPTION = Indoor and outdoor communication abnormal
REFERENCE PART = EC05

ERROR CODE = Operation LED and reservation LED alternating flickering (1Hz period)
ERROR DESCRIPTION = Wired remote controller communication abnormal
REFERENCE PART = EC06

ERROR CODE = Filter LED flickering (1Hz period)
ERROR DESCRIPTION = Outdoor pipe temperature sensor abnormal
REFERENCE PART = EC07


Trouble shooting by outdoor unit error code

ERROR CODE = LED flickering
ERROR DESCRIPTION = Communication error between indoor unit and centralized controller
REFERENCE PART = EC20


Receiver & Display Unit
If the error occurs, the indicators on the receiver & display unit displays the error.

Service manual download here

Read More ->>

Monday, October 25, 2010

Panasonic Error Code

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Diagnosis display = H00
Abnormality / Protection control = No abnormality detected
Abnormality Judgement =
Emergency operation = Normal operation
Primary location to verify =

Diagnosis display = H11
Abnormality / Protection control = Indoor / Outdoor abnormal communication
Abnormality Judgement = > 1 min after starting operation
Emergency operation = Indoor fan operation only
Primary location to verify = • Internal / external cable connections • Indoor / Outdoor PCB

Diagnosis display = H14
Abnormality / Protection control = Indoor intake air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Intake air temperature sensor (detective or disconnected)

Diagnosis display = H15
Abnormality / Protection control = Outdoor compressor temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec
Emergency operation =
Primary location to verify = Compressor temperature sensor (detective or disconnected)

Diagnosis display = H16
Abnormality / Protection control = Outdoor Current Transformer open circuit
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Outdoor PCB • IPM (Power transistor) module

Diagnosis display = H19
Abnormality / Protection control = Indoor fan motor mechanism locked
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Indoor PCB • Fan motor

Diagnosis display = H23
Abnormality / Protection control = Indoor heat exchanger temperature sensor abnormality
Abnormality Judgement =
Emergency operation = O (Cooling only}
Primary location to verify = • Heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H24
Abnormality / Protection control = Indoor heat exchanger temperature sensor 2 abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H27
Abnormality / Protection control = Outdoor intake air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation = O
Primary location to verify = • Outdoor temperature sensor (detective or disconnected)

Diagnosis display = H28
Abnormality / Protection control = Outdoor heat exchanger temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation = O
Primary location to verify = • Outdoor heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H30
Abnormality / Protection control = Outdoor discharge air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Outdoor temperature sensor (detective or disconnected)

Diagnosis display = H33
Abnormality / Protection control = Indoor / Outdoor wrong connection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Indoor / Outdoor supply voltage

Diagnosis display = H38
Abnormality / Protection control = Indoor / Outdoor mismatch (brand code)
Abnormality Judgement =
Emergency operation =
Primary location to verify =

Diagnosis display = H50
Abnormality / Protection control = Ventilation motor abnormality
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Indoor PCB • Ventilation motor

Diagnosis display = H51
Abnormality / Protection control = Nozzle lock abnormality
Abnormality Judgement = 2 times occurance continuously
Emergency operation =
Primary location to verify = •Nozzle

Diagnosis display = H52
Abnormality / Protection control = Limit switch abnormality
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Indoor PCB

Diagnosis display = H97
Abnormality / Protection control = Outdoor fan motor mechanism locked
Abnormality Judgement = 2 times occurance within 30 minutes
Emergency operation =
Primary location to verify = • Indoor PCB • Fan motor

Diagnosis display = H98
Abnormality / Protection control = Indoor high pressure protection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Air filter dirty • Air circulation short circuit

Diagnosis display = H99
Abnormality / Protection control = Indoor heat exchanger anti-freezing protection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Insufficient refrigerant • Air filter dirty

Diagnosis display = F11
Abnormality / Protection control = Cooling / Heating cycle changeover abnormality
Abnormality Judgement = 4 times occurance within 30 minutes
Emergency operation =
Primary location to verify = •4-way valve • V-coil

Diagnosis display = F90
Abnormality / Protection control = PFC control
Abnormality Judgement = 4 times occurance within 10 minutes
Emergency operation =
Primary location to verify = • Voltage at PFC

Diagnosis display = F91
Abnormality / Protection control = Refrigerantion cycle abnormality
Abnormality Judgement = 2 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • No refrigerant (3-way valve is closed)

Diagnosis display = F93
Abnormality / Protection control = Compressor rotation failure
Abnormality Judgement = 4 times occurance within 20 minutes
Emergency operation =
Primary location to verify = •Compressor

Diagnosis display = F95
Abnormality / Protection control = Cool high pressure protection
Abnormality Judgement = 4 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • Outdoor refrigerant circuit

Diagnosis display = F96
Abnormality / Protection control = IPM (power transistor) overheating protection
Abnormality Judgement = 4 times occurance within 30 minutes
Emergency operation =
Primary location to verify = • Excess refrigerant • Improper heat radiation • IPM (Power transistor)

Diagnosis display = F97
Abnormality / Protection control = Outdoor compressor overheating protection
Abnormality Judgement = 4 times occurance within 10 minutes
Emergency operation =
Primary location to verify = • Insufficient refrigerant • Compressor

Diagnosis display = F98
Abnormality / Protection control = Total running current protection
Abnormality Judgement = 3 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • Excess refrigerant • Improper heat radiation

Diagnosis display = F99
Abnormality / Protection control = Outdoor Direct Current (DC) peak detection
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Outdoor PCB • IPM (Power transistor) • Compressor
Read More ->>

TCL Error Code

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Protection and Failure Display
- When protection display is available, controller will show error code, digital LED shows
error code and setting temperature by turns.
- If there is more than one failure, it will show at first that in front of the error list.
- Protection display function can be selected in hardware, and the default don’t display;
- To insure of in and out communist is credibility, the failures relate to outdoor unit will
remain failure state for 2 minutes max after recovered.
- In all failures, only sensor failures don’t have to repower to cancel.
- Error list


Failure type = In and out communication failure
LED CODE = RUN,TIMER –both winking
DIGITAL LED CODE = E0

Failure type = Outdoor communication failure
LED CODE = RUN,TIMER –both winking
DIGITAL LED CODE = EC

Failure type = Outdoor sensor
LED CODE = RUN-1 time/8s
DIGITAL LED CODE = E1

Failure type = Indoor coil temperature sensor
LED CODE = RUN-2 times/8s
DIGITAL LED CODE = E2

Failure type = Outdoor coil temperature sensor
LED CODE = RUN-3 times/8s
DIGITAL LED CODE = E3

Failure type = System abnormity
LED CODE = RUN-4 times /8s
DIGITAL LED CODE = E4

Failure type = Type mismatch
LED CODE = RUN-5 times /8s
DIGITAL LED CODE = E5

Failure type = Indoor fan motor
LED CODE = RUN-6 times /8s
DIGITAL LED CODE = E6

Failure type = Outdoor temperature sensor
LED CODE = RUN-7 times /8s
DIGITAL LED CODE = E7

Failure type = Discharge temperature sensor
LED CODE = RUN-8 times /8s
DIGITAL LED CODE = E8

Failure type = Invert module abnormity
LED CODE = RUN-9 times /8s
DIGITAL LED CODE = E9

Failure type = Outdoor fan motor (DC)
LED CODE = RUN-10 times /8s
DIGITAL LED CODE = EF

Failure type = Current sensor
LED CODE = RUN--11 times /8s
DIGITAL LED CODE = EA

Failure type = EEPROM failure
LED CODE = RUN-12 times /8s
DIGITAL LED CODE = EE

Failure type = Top of compressor temperature switch
LED CODE = RUN-13 times /8s
DIGITAL LED CODE = EP

Failure type = Voltage sensor
LED CODE = RUN-14 times /8s
DIGITAL LED CODE = EU

Protection display code list:

Protection type = higher or lower voltage
LED CODE = RUN-winking,TIMER-1 time/8s
DIGITAL LED CODE = P1

Protection type = Over current
LED CODE = RUN- winking,TIMER-2 times /8s
DIGITAL LED CODE = P2

Protection type = Discharge temperature
LED CODE = RUN- winking,TIMER-4 times /8s
DIGITAL LED CODE = P4

Protection type = Over cooling in cooling mode
LED CODE = RUN-light,TIMER-5 times /8s
DIGITAL LED CODE = P5

Protection type = Over heating in cooling mode
LED CODE = RUN- light,TIMER-6 times /8s
DIGITAL LED CODE = P6

Protection type = Over heating in heating mode
LED CODE = RUN- light,TIMER-7 times /8s
DIGITAL LED CODE = P7

Protection type = Outdoor temperature too high or low
LED CODE = RUN- light,TIMER-8 times /8s
DIGITAL LED CODE = P8

Protection type = Drive protection(Overload)
LED CODE = RUN- winking,TIMER-9 times/8s
DIGITAL LED CODE = P9

Protection type = Module self protection
LED CODE = RUN- winking,TIMER-10 times/8s
DIGITAL LED CODE = P0


Outdoor failure display
There is a LED on outdoor power board, when compressor is running; it is normally light;
when no feedback of signal to power board from compressor, it will wink by lighting 1s and
going out 1s. If failures happened, it will light 0.5s, go out 0.5s, winking several times and go
out 3s for a cycle to indicate failures. The failure list is the follow:

Blink times(n) = 1
Failure = IPM protection

Blink times(n) = 2
Failure = higher or lower voltage

Blink times(n) = 3
Failure = Over current

Blink times(n) = 4
Failure = Discharge temperature too high

Blink times(n) = 5
Failure = Outdoor coil temperature too high

Blink times(n) = 6
Failure = Drive abnormity

Blink times(n) = 7
Failure = Communication abnormity with indoor unit

Blink times(n) = 8
Failure = Compressor over heat (switch on top of compressor)

Blink times(n) = 9
Failure = Outdoor air temperature sensor failure

Blink times(n) = 10
Failure = Outdoor coil temperature sensor failure

Blink times(n) = 11
Failure = Outdoor discharge pipe temperature sensor failure

Blink times(n) = 12
Failure = Voltage sensor failure

Blink times(n) = 13
Failure = Current sensor failure

Blink times(n) = 14
Failure = IPM abnormity

Blink times(n) = 15
Failure = Outdoor communication abnormity

Blink times(n) = 16
Failure = DC fan motor no feedback

Blink times(n) = 17
Failure = defrosting


Blink times(n) = 18
Fault Message = Short-circuit / open-circuit fault of intake temperature sensor

Blink times(n) = 19
Fault Message = Outdoor EEPROM fault

Blink times(n) = 20
Fault Message = Outdoor fan motor protection

Blink times(n) = 21
Fault Message = Indoor fan motor protection

Blink times(n) = 23
Fault Message = System in shortage of Freon

Blink times(n) = 24
Fault Message = Model configuration wrong

Blink times(n) = 25
Fault Message = Indoor sensor fault

Blink times(n) = 26
Fault Message = Indoor coil sensor fault

Blink times(n) = 27
Fault Message = Indoor EEPROM fault

Blink times(n) = 28
Fault Message = Indoor fan motor fault

Blink times(n) = 30
Fault Message = drive fault(V4、VP2)

Blink times(n) = 31
Fault Message = Outdoor environmental Over temperature / Under temperature protection

Blink times(n) = 32
Fault Message = Indoor coil defrost prevention

Blink times(n) = 33

Fault Message = Indoor coil overheating protection

Read More ->>

Saturday, October 23, 2010

Haier Fault Codes

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Model HDU-24CA03/M(R1) HDU-28CA03/M(R1) HDU-36CA03/M(R1) HDU-42CA03/M(R1)
Model HSU-09/12HVA103/R2(DB)FOR Eorope



Code = E0
Flash time of
compressor
running
indicate lamp = 10
Trouble contents (old) = drainage system trouble
Trouble contents (new) = drainage system trouble


Code = E1
Flash time of
compressor
running
indicate lamp = 1
Trouble contents (old) = indoor temperature sensor broken
Trouble contents (new) = indoor temperature sensor broken


Code = E2
Flash time of
compressor
running
indicate lamp = 2
Trouble contents (old) = indoor coil temperature sensor broken
Trouble contents (new) = indoor coil temperature sensor broken


Code = E3
Flash time of
compressor
running
indicate lamp = 3
Trouble contents (old) = outdoor temperature sensor broken
Trouble contents (new) = outdoor temperature sensor broken


Code = E4
Flash time of
compressor
running
indicate lamp = 4
Trouble contents (old) = outdoor coil temperature sensor broken
Trouble contents (new) = outdoor coil temperature sensor broken


Code = E5
Flash time of
compressor
running
indicate lamp = 5
Trouble contents (old) = over current protect limit
Trouble contents (new) = over current protect limit


Code = E6
Flash time of
compressor
running
indicate lamp = 6
Trouble contents (old) = pressure protect
Trouble contents (new) = pressure protect


Code = E7
Flash time of
compressor
running
indicate lamp = 7
Trouble contents (old) = communication trouble between wired remote controller and indoor unit.
Trouble contents (new) = three phase protect


Code = E8
Flash time of
compressor
running
indicate lamp = 8
Trouble contents (old) = communication trouble between indoor and outdoor unit.
Trouble contents (new) = Communication trouble between wired remote controller and indoor unit


Code = E9
Flash time of
compressor
running
indicate lamp = 9
Trouble contents (old) = three phase protect
Trouble contents (new) = communication trouble between indoor and outdoor unit


HSU-09/12HVA103/R2(DB)FOR Eorope

Error Codes and Description indoor and outdoor display(1)

Indoor and Outdoor = E7
Indoor Malfunction =
Code indication
Indoor =
Outdoor (LED1 flash times) = 15
Description = Communication fault between indoor and outdoor units

Indoor and Outdoor =
Indoor Malfunction = E1
Code indication
Indoor =
Outdoor (LED1 flash times) =
Description = Room temperature sensor failure

Indoor and Outdoor =
Indoor Malfunction = E2
Code indication
Indoor =
Outdoor (LED1 flash times) =
Description = Heat-exchange sensor failure

Indoor and Outdoor =
Indoor Malfunction = E4
Code indication
Indoor =
Outdoor (LED1 flash times) =
Description = Indoor EEPROM error

Indoor and Outdoor =
Indoor Malfunction = E14
Code indication
Indoor =
Outdoor (LED1 flash times) =
Description = Indoor fan motor malfunction

Indoor and Outdoor =
Indoor Malfunction = E9
Code indication
Indoor =
Outdoor (LED1 flash times) =
Description = High work-E9 intense protection

Error Codes and Description indoor and outdoor display(2)


Outdoor Malfunction
Code Indication
Indoor = F12
Outdoor (LED1 flash times) = 1
Description = Outdoor EEPROM error

Outdoor Malfunction
Code Indication
Indoor = F11
Outdoor (LED1 flash times) = 2
Description = The protection of IPM

Outdoor Malfunction
Code Indication
Indoor = F22
Outdoor (LED1 flash times) = 3
Description = Over current protection of AC electricity for the outdoor model

Outdoor Malfunction
Code Indication
Indoor = F11
Outdoor (LED1 flash times) = 4
Description = Communication fault between the IPM and outdoor PCB

Outdoor Malfunction
Code Indication
Indoor =
Outdoor (LED1 flash times) = 5
Description = Over pressure or Overheat protection for the compressor

Outdoor Malfunction
Code Indication
Indoor = F11
Outdoor (LED1 flash times) = 6
Description = Power voltage is too high or low

Outdoor Malfunction
Code Indication
Indoor = F4
Outdoor (LED1 flash times) = 8
Description = Overheat protection for exhaust temperature

Outdoor Malfunction
Code Indication
Indoor =
Outdoor (LED1 flash times) = 9
Description = outdoor fan motor malfunction

Outdoor Malfunction
Code Indication
Indoor = F21
Outdoor (LED1 flash times) = 10
Description = Frost-removing temperature sensor failure

Outdoor Malfunction
Code Indication
Indoor = F6
Outdoor (LED1 flash times) = 12
Description = Ambient temperature sensor failure

Outdoor Malfunction
Code Indication
Indoor = F25
Outdoor (LED1 flash times) = 13
Description = Exhaust temperature sensor failure

Outdoor Malfunction
Code Indication
Indoor =
Outdoor (LED1 flash times) = 18
Description = deviate from the normal for the compressor

Outdoor Malfunction
Code Indication
Indoor = F11
Outdoor (LED1 flash times) = 19
Description = Loop of the station detect error

Outdoor Malfunction
Code Indication
Indoor = - - -
Outdoor (LED1 flash times) = 24
Description = Over current of the compressor

Outdoor Malfunction
Code Indication
Indoor = - - -
Outdoor (LED1 flash times) = 25
Description = Over current protection for single-past of the compressor
Read More ->>

LG Fault Code For SMS

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Keyword Response

00 Text the 1, 2 or 3 digit fault code number only. I.e. If you see fault code CH07 on your indoor unit or R/Controller, only type 7 or 07 in your text message.

01 Indoor unit return air sensor fault.
Disconnect sensor from PCB and measure resistance. 8 kOhm at 30C and 13 kOhm at 20C if not replace sensor.

1 Indoor unit return air sensor fault. Disconnect sensor from PCB and measure resistance. 8 kOhm at 30C and 13 kOhm at 20C if not replace sensor.

02 Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor.

2 Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor.

03 Remote controller comms error. Check wired correctly, if so check dipswitch in RC. Set to Sg for 1 unit, or Gr for group then reset power.

3 Remote controller comms error.
Check wired correctly, if so check dipswitch in RC. Set to Sg for 1 unit, or Gr for group then reset power

04 RAC Product = Heat Sink Sensor Error, Open/Short Cct or over 95C. Commercial Product = Condensate pump float switch risen. Check drain pan is empty,
check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.

4 RAC Product = Heat Sink Sensor Error, Open/Short Cct or over 95C. Commercial Product = Condensate pump float switch risen. Check drain pan is empty,
check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.

05 Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4

5 Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4

06 Indoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10C and 4 kOhm at 30C. if not replace sensor. Split = text 21

6 Indoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10C and 4 kOhm at 30C. if not replace sensor. Split = text 21

07 Multi Splits and Multi V = indoor unit is set to run in a different mode from the master indoor unit. Set ALL indoor units to cooling or ALL to heating to clear.
Splits = Compressor Over Current (CT2), also see Code 06.

7 Multi Splits and Multi V = indoor unit is set to run in a different mode from the master indoor unit. Set ALL indoor units to cooling or ALL to heating to clear.
Splits = Compressor Over Current (CT2), also see Code 06.

08 RAC Indoor unit BLDC Fan problem. This is caused by the Indoor fan being locked.
Check fan motor is plugged in correctly, Electrically & Mechanically sound.
Check the fan motor turns freely, check the AC Voltage supplied to the fan motor, this will vary from 120 V ac at low speed to 170V AC at high speed.
If no Voltage is present the the PCB is faulty, if Voltage is present the fan motor will be Faulty.

8 RAC Indoor unit BLDC Fan problem.
This is caused by the Indoor fan being locked.
Check fan motor is plugged in correctly, Electrically & Mechanically sound.
Check the fan motor turns freely, check the AC Voltage supplied to the fan motor, this will vary from 120 V ac at low speed to 170V AC at high speed.
If no Voltage is present the the PCB is faulty, if Voltage is present the fan motor will be Faulty.

09 Split = Outdoor unit fan problem. Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB. Multi V
= Indoor unit EEPROM error - Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control.

9 Split = Outdoor unit fan problem. Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB.
Multi V = Indoor unit EEPROM error - Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control.

10 RAC Product: Compressor discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C, 168 kOhm at 30C. Multi Fdx & Multi V text 8

11 Multi V indoor unit not connected to an outdoor unit. Check comms wiring is correct, and check initialisation has been carried out correctly

12 RAC Product = EEPROM Sum Check Error, text 60 for help.

13 RAC Product = PSC (Reactor) Error, text 27 for help.

14 RAC Product = Compressor Phase Current Error

15 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
16 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
17 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
18 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
19 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
20 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

21 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms, Check to earth 50 MOhm minimum, check run current.

22 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms . Check to earth 50 MOhm minimum, check run current

23 Inverter dc voltage low. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB

24 Splits and Multi Splits = High or low pressure trip. Low at 1 bar High at 35 bar check pressures. Multi V = High pressure trip.
25 Check power supply voltage to the outdoor unit is correct (1ph ?220 Vac ±10% or 3ph ?380 Vac ±10%). If OK, check fuses, if fuses are OK replace outdoor
main PCB.

26 Inverter compressor seized. Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum, check run current and Inverter
outputs.

27 Inverter current irregularity. Check inverter PCB, check reactor connections and its resistance is less than 1 ohm.

28 Inverter dc voltage too high. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB.

29 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
30 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
31 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

32 Inverter compressor discharge temperature too high. If over 105°C, check refrigerant charge

33 Excessive rise of standard compressor discharge temperature. If over 105°C check refrigerant charge

34 Excessive high pressure rise, over 35 bar at HP sensor. Check pressures, check coils, and filters are clean check for OFN in system pipework

35 Excessive low pressure drop under 1 Bar at LP sensor. Check pressures, and check service valves open.

36 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
37 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
38 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
39 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

40Inverter ac current abnormal. Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum, check run current and inverter
outputs.

41 Inverter compressor discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168 kOhm at 30°C.

42 Low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar

43 High pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar

44 Outdoor unit air sensor fault. Disconnect from PCB and measure resistance. 8 kOhm at 30C and 13 kOhm at 20C. If OK replace PCB, if not replace sensor.

45 Outdoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor.

46 Outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor
47 Compressor discharge sensor fault. Disconnect from PCB measure resistance. 237 kOhm at 20°C and 168 kOhm at 30°C. If OK replace PCB, if not replace
sensor.
48 Split/Multi Split = Outdoor unit discharge and air sensor both unplugged. Multi V = Outdoor unit coil sensor. Text 45 for diagnostics.

49 Check power supply voltage to the outdoor unit is correct (1ph ?220 Vac ±10% or 3ph ?380 Vac ±10%). If OK check fuses, if fuses OK, replace outdoor main
PCB.

50 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

51 Unit mismatch. Check model number of units do not exceed maximum. Multi V - also check Sub outdoor unit dipswitch settings.

52 Communication error between inverter PCB and main outdoor unit PCB. Check wiring fuses and LEDs . If OK either inverter or main PCB defective.

53 Comms error indoor to outdoor unit. Check your wiring . Split and Multi - check voltage from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4.

54 Reverse or open phase. Check all 3 phases are present and correct. If correct voltage appears at all three phases, swap any two to cure the fault
55 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
56 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
57 Comms error between outdoor main PCB and inverter PCB. Check wiring fuses and LEDs are lit. If OK either inverter or main PCB defective

58 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
59 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

60 Outdoor unit PCB EEPROM failure, try removing EEPROM and refitting if removable (possible contact fault), otherwise replace PCB if the EEPROM is nonremovable.

61 Condenser coil over 65°C. Check coil and filters are clean and free from debris, and airflow is OK. Check system pressures for non-condesables.

62 Inverter over 85°C. Check air flow across heat sink, check inverter tight to heatsink use thermal paste. Multi V - check inverter cooling fan.

63 Multi F(DX) - "Cond. Pipe Sensor Temp. Low" (opposite to Error Code 61). Check Temperature/Resistance reading and replace sensor if found to be faulty. If
sensor okay, check for cause of low temperature and rectify.

64 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

65 Outdoor unit inverter fin temperature sensor fault. Disconnect from PCB measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C

67 Outdoor Fan Motor siezed, or rotation sensing circuit failure. Check motor for mechanical and/or electrical failure, if okay replace pcb.

100 Excessive discharge temperature rise 105°C Sub condenser 1 standard compressor. Check refrigerant
101 Excessive discharge temperature rise 105°C Sub condenser 1 standard compressor. Check refrigerant
102 Excessive discharge temperature rise 105°C Sub condenser 2 standard compressor. Check refrigerant
103 Excessive discharge temperature rise 105°C Sub condenser 2 standard compressor. Check refrigerant

104 Communication error between Main and Sub outdoor units. Check comms wiring and power to all outdoor units.

105 Communication error between outdoor main PCB and fan PCB. Check plug connections and LEDs. If OK, replace either main or fan PCB.

106 Outdoor unit fan motor high current. Check fans rotate freely, and are connected correctly.

107 Outdoor unit low voltage to fan PCB. Check 300 Vdc supply, check fuses and plug connections. If OK, replace fan PCB.

108 Communication error between outdoor main PCB, and fan PCB. Check plug connections and LEDs. If OK replace either main or fan PCB.

109 Sub 1 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris.

110 Sub 1 reverse or open phase. Check all 3 phases are present and correct. If correct voltage appears at all three phases, swap any two to cure the fault.

111 Communication error between Main and Sub outdoor units. Check comms wiring and power to all outdoor units

113 Main outdoor unit liquid pipe sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

114 Main outdoor unit Subcool inlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

115 Main outdoor unit Subcool outlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

116 Sub 1 high pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar

117 Sub 1 low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar

118 Sub 1 outdoor unit air sensor fault. Disconnect from PCB and measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C. If OK replace PCB, if not replace
sensor

120 Sub 1 outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. if not replace sensor

121 Sub 1 compressor 1 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168 kOhm at 30°C. if not replace sensor

122 Sub 1 compressor 2 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168 kOhm at 30°C. if not replace sensor

123 Sub 1 outdoor unit coil sensor A fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

124 Sub 1 outdoor unit coil sensor B fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

125 Sub 1 outdoor unit liquid pipe sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

126 Sub 1 outdoor unit Subcool inlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

127 Sub 1 outdoor unit Subcool outlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

128 Sub 2 high pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar

129 Sub 2 low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar

130 Sub 2 outdoor unit air sensor fault. Disconnect from PCB and measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C. If OK replace PCB, if not replace
sensor.
132 Sub 2 outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C.if not replace sensor

133 Sub 2 compressor 1 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168kOhm at 30°C. if not replace sensor

134 Sub 2 compressor 2 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168kOhm at 30°C.if not replace sensor

135 Sub 2 outdoor unit coil sensor A fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

136 Sub 2 outdoor unit coil sensor B fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

137 Sub 2 outdoor unit liquid pipe sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

138 Sub 2 outdoor unit Subcool inlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

139 Sub 2 outdoor unit Subcool outlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

140 Sub 2 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris

141 Sub 2 reverse or open phase. Check all 3 phases are present and correct. If correct voltage appears at all three phases, swap any two to cure the fault

142 Communication error between Main and Sub outdoor units. Check comms wiring and power to all outdoor units

143 Sub 1 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris
144 Sub 1 excessive drop of low pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris
145 Sub 2 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris
146 Sub 2 excessive drop of low pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris

147 Sub 1 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%).check fuses, if fuses OK replace outdoor main PCB
148 Sub 1 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%). check fuses, if fuses OK replace outdoor main PCB
149 Sub 2 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%). check fuses, if fuses OK replace outdoor main PCB
150 Sub 2 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%). check fuses, if fuses OK replace outdoor main PCB

151 Faulty 4 way valve. Check solenoid coil and output from PCB. If OK, mechanical failure.

152 Excessive discharge temperature rise 105°C Sub condenser 2 standard compressor. Check refrigerant

153 Excessive discharge temperature rise 105°C Sub condenser 2 standard compressor. Check refrigerant

154 Sub 3 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris

155 Sub 3 reverse or open phase. Check all 3 phases are present and correct.
If correct voltage appears at all three phases, swap any two to cure the fault.

156 Communication error between Main and Sub outdoor units. Check comms wiring and power to all outdoor units

157 Sub 3 high pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar

158 Sub 3 low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar

159 Sub 3 outdoor unit air sensor fault. Disconnect from PCB and measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C. If OK replace PCB, if not replace
sensor.

161 Sub 3 outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. if not replace sensor.

162 Sub 3 compressor 1 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168 kOhm at 30°C. if not replace sensor.

163 Sub 3 compressor 2 discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C and 168 kOhm at 30°C.if not replace sensor.

164 Sub 3 outdoor unit coil sensor A fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor.

165 Sub 3 outdoor unit coil sensor B fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor.

166 Sub 3 outdoor unit liquid pipe sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

167 Sub 3 outdoor unit Subcool inlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

168 Sub 3 outdoor unit Subcool outlet sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C

169 Sub 3 excessive rise of high pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris

170 Sub 3 excessive drop of low pressure. Check pressures, check for non condensables, check heat exchanger coil is free from debris

171 Sub 3 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%). check fuses, if fuses OK replace outdoor main PCB

172 Sub 3 check power supply voltage to the outdoor unit is correct (1ph 220 Vac ±10% or 3ph 380 Vac ±10%). check fuses, if fuses OK replace outdoor main PCB

173 Main outdoor unit standard compressor not starting. Check output from main PCB, check contactor, and check wiring connections. If OK compressor faulty

174 Sub 1 standard compressor 1 not starting. Check output from main PCB, check contactor, and check wiring connections. If OK compressor faulty
175 Sub 1 standard compressor 2 not starting. Check output from main PCB, check contactor, and check wiring connections. If OK compressor faulty
176 Sub 2 standard compressor 1 not starting. Check output from main PCB, check contactor, and check wiring connections. If OK compressor faulty
177 Sub 2 standard compressor 2 not starting. Check output from main PCB, check contactor, and check wiring connections. If OK compressor faulty

204 Comms Error between Outdoor Unit and HR Box No1. 1. Defective connection in HR unit power supply and transmission connection 2. Wrong setting of the HR
unit Rotary switch and Dip switch 3. Defective HR unit PCB.

208 Comms Error between Outdoor Unit and HR Box No2. 1. Defective connection in HR unit power supply and transmission connection 2. Wrong setting of the HR
unit Rotary switch and Dip switch 3. Defective HR unit PCB.

212 Comms Error between Outdoor Unit and HR Box No3. 1. Defective connection in HR unit power supply and transmission connection 2. Wrong setting of the HR
unit Rotary switch and Dip switch 3. Defective HR unit PCB.

240 Central controller wiring error. Check all comms wiring, including between controller and CNU, and IP addresses. If OK possible defective CNU.

241 Central controller data sending error. Either defective CNU or Central controller initialisation failure.

242 Central controller data receiving error. Either defective CNU or Central controller initialisation failure.

243 Central controller. Comms cable too long or picking up external electrical noise. If OK, mismatching of controllers, or defective CNU.

244 Central controller data receiving time out. Either defective CNU or Central controller initialisation failure.

245 Central controller data sending time out. Either defective CNU or Central controller initialisation failure.

246 Central controller data receiving time out. Either defective CNU or Central controller initialisation failure

250 Central controller data receiving error. Either comms cable picking up external electrical noise, or defective CNU

251 Central controller receiving no data. Either comms cable picking up external electrical noise, or defective CNU

252 Central controller incorrect address error. Check addresses match, if OK either comms cable picking up external electrical noise, or defective CNU.

253 Central Controller Disconnection Error, No response from Air Conditioner. Check wiring, if OK either comms cable picking up external electrical noise, defective
CNU, or Interface.

C1 Indoor unit return air sensor fault, Open or Short. Disconnect sensor from PCB and measure resistance. 8 kOhm at 30C and 13 kOhm at 20C if not replace
sensor.

C2 Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor.

C4 RAC Product = Heat Sink Sensor Error, Open/Short Cct or over 95C. Commercial Product = Condensate pump float switch risen. Check drain pan is empty,
check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.

C5 Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4.

C6 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms, Check to earth 50 MOhm minimum, check run current

C7 Splits = Compressor Over Current (CT2), also see Code 06
.
C8 RAC Indoor unit BLDC Fan problem. This is caused by the Indoor fan being locked. Check fan motor is plugged in correctly, Electrically & Mechanically sound.
Check the fan motor turns freely, check the AC Voltage supplied to the fan motor, this will vary from 120 V ac at low speed to 170V AC at high speed. If no
Voltage is present the the PCB is faulty, if Voltage is present the fan motor will be Faulty.

C9 Outdoor unit fan problem. Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB.

CA Compressor discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C, 168 kOhm at 30C.

CC RAC Product = EEPROM Sum Check Error, text 60 for help.

Cd RAC Product = PSC (Reactor) Error, text 27 for help.

CE RAC Product = Compressor Phase Current Error.

CH00 Text the 1, 2 or 3 digit fault code number only. I.e. If you see fault code CH07 on your indoor unit or R/Controller, only type 7 or 07 in your text message.

CH01 Indoor unit return air sensor fault. Disconnect sensor from PCB and measure resistance. 8 kOhm at 30C and 13 kOhm at 20C if not replace sensor.

CH02 Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor.

CH03 Remote controller comms error. Check wired correctly, if so check dipswitch in RC. Set to Sg for 1 unit, or Gr for group then reset power.

CH04 RAC Product = Heat Sink Sensor Error, Open/Short Cct or over 95C. Commercial Product = Condensate pump float switch risen. Check drain pan is empty,

check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.

CH05 Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4.

CH06 Indoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10C and 4 kOhm at 30C. if not replace sensor. Split = text 21.

CH07 Multi Splits and Multi V = indoor unit is set to run in a different mode from the master indoor unit. Set ALL indoor units to cooling or ALL to heating to clear.
Splits = Compressor Over Current (CT2), also see Code 06.

CH08 RAC Indoor unit BLDC Fan problem. This is caused by the Indoor fan being locked. Check fan motor is plugged in correctly, Electrically & Mechanically sound.
Check the fan motor turns freely, check the AC Voltage supplied to the fan motor, this will vary from 120 V ac at low speed to 170V AC at high speed. If no
Voltage is present the the PCB is faulty, if Voltage is present the fan motor will be Faulty.

CH09 Split = Outdoor unit fan problem.
Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB. Multi V = indoor PCB failure. Replace PCB

CH10 RAC Product: Compressor discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20°C, 168 kOhm at 30C. Multi Fdx & Multi V text 8

CH11 Multi V indoor unit not connected to an outdoor unit. Check comms wiring is correct, and check initialisation has been carried out correctly

CH12 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH13 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH14 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH15 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH16 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH17 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH18 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH19 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH20 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

CH21 Inverter compressor run current high. Check compressor windings all equal 1 to 4 OhmsCheck to earth 50 MOhm minimum, check run current

CH22 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms . Check to earth 50 MOhm minimum, check run current

CH23 Inverter dc voltage low. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB

CH24 Splits and Multi Splits = High or low pressure trip. Low at 1 bar High at 35 bar check pressures. Multi V = High pressure trip.

CH25 Check power supply voltage to the outdoor unit is correct (1ph ?220 Vac ±10% or 3ph ?380 Vac ±10%). If OK, check fuses, if fuses are OK replace outdoor
main PCB

CH26 Inverter compressor seized. Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum, check run current and Inverter
outputs

CH27 Inverter current irregularity. Check inverter PCB and reactor

CH28 Inverter dc voltage too high. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB

CH29 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH30 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH31 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

CH32 Inverter compressor discharge temperature too high. If over 105°C, check refrigerant charge

CH33 Excessive rise of standard compressor discharge temperature. If over 105°C check refrigerant charge

CH34 Excessive high pressure rise, over 35 bar at HP sensor. Check pressures, check coils, and filters are clean check for OFN in system pipework

CH35 Excessive low pressure drop under 1 Bar at LP sensor. Check pressures, and check service valves open


CH36 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH37 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH38 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message
CH39 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message

CH40 Inverter ac current abnormal.
Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum, check run current and inverter outputs.

CH41 Inverter compressor discharge sensor fault. Disconnect from PCB measure resistance 237 kOhm at 20C and 168 kOhm at 30C.

CH42 Low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar.

CH43 High pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar.

CH44 Outdoor unit air sensor fault. Disconnect from PCB and measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C. If OK replace PCB, if not replace sensor

CH45 Outdoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

CH46 Outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor.

CH47 Compressor discharge sensor fault. Disconnect from PCB measure resistance. 237 kOhm at 20°C and 168 kOhm at 30°C. If OK replace PCB, if not replace
sensor.

CH48 Split/Multi Split = Outdoor unit discharge and air sensor both unplugged. Multi V = Outdoor unit coil sensor. Text 45 for diagnostics.

CH49 Check power supply voltage to the outdoor unit is correct (1ph ?220 Vac ±10% or 3ph ?380 Vac ±10%). If OK check fuses, if fuses OK, replace outdoor main
PCB.

CH50 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH51 Unit mismatch. Check model number of units do not exceed maximum. Multi V - also check Sub outdoor unit dipswitch settings.

CH52 Communication error between inverter PCB and main outdoor unit PCB. Check wiring fuses and LEDs . If OK either inverter or main PCB defective.

CH53 Comms error indoor to outdoor unit. Check your wiring . Split and Multi - check voltage from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4.

CH54 Reverse or open phase. Check all 3 phases are present and correct. If correct voltage appears at all three phases, swap any two to cure the fault.

CH55 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH56 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH57 Comms error between outdoor main PCB and inverter PCB. Check wiring fuses and LEDs are lit. If OK either inverter or main PCB defective.

CH58 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH59 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH60 Outdoor unit PCB EEPROM failure, try removing EEPROM and refitting if removable (possible contact fault), otherwise replace PCB if the EEPROM is nonremovable.

CH61 Condenser coil over 65°C. Check coil and filters are clean and free from debris, and airflow is OK. Check system pressures for non-condesables.

CH62 Inverter over 85°C. Check air flow across heat sink, check inverter tight to heatsink use thermal paste. Multi V - check inverter cooling fan.
CH63 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH64 no such fault code Text 1, 2 or 3 digit fault code number only. If you see fault code CH07 only type 7 in your text message.

CH65 Outdoor unit inverter fin temperature sensor fault. Disconnect from PCB measure resistance. 8 kOhm at 30°C and 13 kOhm at 20°C.

CH67 Outdoor Fan Motor siezed, or rotation sensing circuit failure. Check motor for mechanical and electrical failure.

CL CL = Child Lock. Press Timer & Min buttons simultaneously for 5 seconds to engage/disengage function.

help Text the 1, 2 or 3 digit fault code number only. I.e. If you see fault code CH07 on your indoor unit or R/Controller, only type 7 or 07 in your text message.

HL Condensate pump float switch risen. Check drain pan is empty, check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.
Alternatively, Dry Contact Interface is in "OFF" condition. Check status and adjust as necessary.

Po Po = Jet Cool Mode selected. To cancel press Jet Cool, Fan Speed or Set Temperature butto
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LG Multi Split Units Error Code

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LG Air Conditioning Multi F(DX) Fault Codes Sheet

Multi Split Units
If there is a fault on any LG Multi unit, an Error mark is indicated on the display window of the indoor unit, wired-remote controller, and LED’s of outdoor unit control board.
A two digit number will appear on the wired remote controllers LCD display, e.g. CH05. If the unit does not have a wired remote the fault will be displayed using the LED's on the front of the indoor unit.
If more than two troubles occur simultaneously, the lower numbered error code is displayed first.
After an error occurs, if error is released, error LED is also released simultaneously.
Error IndicatorIndoor unit faults = CH01 or C1
Fascia LED’s
- RED = None
- GREEN = 1 Flash
Contents = Indoor Air Sensor (Open/Short)
Case of Error = Open or Short Circuit
Indoor Status = Off

Indoor unit faults = CHO2 or C2
Fascia LED’s
- RED = None
- GREEN = 2 Flash
Contents = Inlet Pipe Sensor
Case of Error = Open or Short Circuit
Indoor Status = Off

Indoor unit faults = CH03 or C3
Fascia LED’s
- RED = None
- GREEN = 3 Flash
Contents = Communication (Indoor Wired R/Control)
Case of Error = Data Communication Fault
Indoor Status = Off

Indoor unit faults = CH04 or C4
Fascia LED’s
- RED = None
- GREEN = 4 Flash
Contents = Drain Pump / Float Switch
Case of Error = Float Switch Open Circuit (High Level Water Alarm)
Indoor Status = Off

Indoor unit faults = CH05 or C5
Fascia LED’s
- RED = None
- GREEN = 5 Flash
Contents = Communication Error (Indoor Outdoor)
Case of Error = Data Communication Fault
Indoor Status = Off

Indoor unit faults = CH06 or C6
Fascia LED’s
- RED = None
- GREEN = 6 Flash
Contents = Outlet Pipe Sensor
Case of Error = Open or Short Circuit
Indoor Status = Off

Indoor unit faults = CH07 or C7
Fascia LED’s
- RED = None
- GREEN = 7 Flash
Contents = Different Operation Mode
Case of Error = Indoor Unit is Set in Different Cool/Heat Operation Mode
Indoor Status = Off

Indoor unit faults = CH09 or C9
Fascia LED’s
- RED = None
- GREEN = 9 Flash
Contents = EEPROM Check Sum
Case of Error = Check Sum Mis-matching
Indoor Status = Off

Indoor unit faults = CH10 or CA
Fascia LED’s
- RED = 1 Flash
- GREEN = None
Contents = BLDC Fan Motor Lock
Case of Error = Fan Motor not Operating
Indoor Status = Off

Indoor unit faults = HL
Fascia LED’s
- RED =
- GREEN =
Contents = High Limit (Float Switch) or Hard Lock
Case of Error = Same as CH 04 (Float Switch Open Circuit) or Unit under Central Control
Indoor Status = Off

Indoor unit faults = CL
Fascia LED’s
- RED =
- GREEN =
Contents = Child Lock Function Selected
Case of Error = Not an Error, Press Timer & Min Buttons Simultaneously for 3 seconds to Toggle On/Off
Indoor Status = On

Indoor unit faults = Po
Fascia LED’s
- RED =
- GREEN =
Contents = Jet Cool Mode Selected
Case of Error = Not an Error, Press Jet Cool Button to Toggle On/Of
Indoor Status = On

Indoor unit faults = Lo
Fascia LED’s
- RED =
- GREEN =
Contents = System in Test Mode
Case of Error = Not an Error
Indoor Status = On


Outdoor Unit Faults can also be read from the outdoor unit PCB using the flashing LED’s as below:

Error code = 21
Contents = IPM Fault (Compressor Over Current)
LED01G (Red) = 2 times
LED02G (Green) = 1 time
Case of Error = Compressor Malfunction, IPM Fault
Outdoor Status = Off

Error code = 22
Contents = CT 2 (Max. Current)
LED01G (Red) = 2 times
LED02G (Green) = 2 times
Case of Error = Current is 14A
Outdoor Status = Off

Error code = 23
Contents = DC Link Low Volt
LED01G (Red) = 2 times
LED02G (Green) = 3 times
Case of Error = DC Link Voltage is 140V
Outdoor Status = Off

Error code = 24
Contents = Low / High Pressure
LED01G (Red) = 2 times
LED02G (Green) = 4 times
Case of Error = Low / High Press Switch OPEN Circuit
Outdoor Status = Off

Error code = 25
Contents = AC Low / AC High Volts
LED01G (Red) = 2 times
LED02G (Green) = 5 times
Case of Error = Abnormal AC Input Voltage (140V , 300V )
Outdoor Status = Off

Error code = 26
Contents = DC Compressor Position
LED01G (Red) = 2 times
LED02G (Green) = 6 times
Case of Error = Position Detection Error
Outdoor Status = Off

Error code = 27
Contents = PSC Fault (Reactor)
LED01G (Red) = 2 times
LED02G (Green) = 7 times
Case of Error = Over Current at “IGBT”
Outdoor Status = Off

Error code = 28
Contents = DC Link High Volts
LED01G (Red) = 2 times
LED02G (Green) = 8 times
Case of Error = DC Link Voltage is 420V
Outdoor Status = Off

Error code = 32
Contents = Discharge Pipe Temp. High (INV. Compressor)
LED01G (Red) = 3 times
LED02G (Green) = 2 times
Case of Error = Discharge Sensor High Temp. (105oC )
Outdoor Status = Off

Error code = 33
Contents = Discharge Pipe Temp. High (Cons. Compressor)
LED01G (Red) = 3 times
LED02G (Green) = 3 times
Case of Error = Discharge Sensor High Temp. (105oC )
Outdoor Status = Off

Error code = 40
Contents = CT Circuit
LED01G (Red) = 4 times
LED02G (Green) =
Case of Error = CT Circuit malfunction Off
Outdoor Status = Off

Error code = 41
Contents = D-Pipe Sensor INV. Compressor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 1 times
Case of Error = Open / Short Circuit
Outdoor Status = Off

Error code = 44
Contents = Air Sensor (Open/Short
LED01G (Red) = 4 times
LED02G (Green) = 4 times
Case of Error = Open / Short circuit
Outdoor Status = Off

Error code = 45
Contents = Cond. Pipe Sensor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 5 times
Case of Error = Open / Short circuit
Outdoor Status = Off

Error code = 46
Contents = Suction Pipe Sensor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 6 times
Case of Error = Open / Short circuit
Outdoor Status = Off

Error code = 47
Contents = D-Pipe Sensor Cons. Compressor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 7 times
Case of Error = Open / Short circuit
Outdoor Status = Off

Error code = 48
Contents = D-Pipe & Air Sensor (Open)
LED01G (Red) = 4 times
LED02G (Green) = 8 times
Case of Error = Dual Sensor unplugged
Outdoor Status = Off

Error code = 51
Contents = Over Capacity
LED01G (Red) = 5 times
LED02G (Green) = 1 times
Case of Error = Over Capacity Combination
Outdoor Status = Off

Error code = 53
Contents = Communication Error (Indoor Outdoor)
LED01G (Red) = 5 times
LED02G (Green) = 3 times
Case of Error = Poor/Loss of Communication
Outdoor Status = Off

Error code = 60
Contents = EEPROM Check Sum
LED01G (Red) = 6 times
LED02G (Green) =
Case of Error = Check Sum Mis-Match
Outdoor Status = Off

Error code = 61
Contents = Cond. Pipe Sensor Temp
LED01G (Red) = 6 times
LED02G (Green) = 1 time
Case of Error = Cond. Temp. High (65oC )
Outdoor Status = Off

Error code = 62
Contents = Heat Sink Sensor Temp
LED01G (Red) = 6 times
LED02G (Green) = 2 times
Case of Error = Heat Sink Temp. High (85oC )
Outdoor Status = Off

Error code = 65
Contents = Heat Sink Sensor (Open/Short)
LED01G (Red) = 6 times
LED02G (Green) = 5 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Read More ->>

Friday, October 22, 2010

Toshiba RAV Error Codes

2 komentar
Toshiba RAV Error Codes

Fault code = 0C
Fault = ROOM TEMP. SENSOR (TA)
Out of place, break,short-circuit.
Operation continuing = 1. Check the indoor temp. sensor. 2. Check the indoor PC board

Fault code = 0d
Fault = INDOOR HEAT-EXCHANGER SENSOR (TC).
Out of place, break, short-circuit.
Operation continuing = 1. Check the indoor heat-exchanger sensor. 2. Check the indoor PC board

Fault code = 04
Fault = RETURN SIGNAL NOT COMING TO INDOOR.
1) Wrong wiring in connecting cable (serial signal).
Operation continuing
1. If outdoor unit does not work at all.
(1) Check the connecting cable correct wrong wiring.
(2) Check the outdoor PC board.
2. If operates normally.
Between indoor terminal plates 2 and 3, return signal is:
Available: Check the indoor PC board.
Not available: Check the outdoor PC board.

Fault code = 08
Fault = 4-WAY VALVE SYSTEM
1) Indoor heat-exchanger temperature rises, after starting cooling operation.
2) Indoor heat-exchanger temperature drops after starting heating operation
Operation continuing
1. Check the 4-way valve.
2. Check the 2-way valve and check valve.
3. Fault with indoor heat exchanger sensor.
4. Check the indoor PC board.

Fault code = 09
Fault = OTHER CYCLE SYSTEM
1) Indoor heat exchange temperature does not change after starting cooling/heating operation.
2) When transmitting instruction for stopping compressor by freeze preventing control.
Operation continuing
1. Compressor case thermostat, IOL, OL operation. (contactor OFF, compressor stops: AH8 Models) (contactor ON, compressor stops: AH Models)
2. Indoor heat-exchange sensor out of place.
3. Check the indoor PC board.
4. Check that service valves are OPEN.
Outdoor unit stops (indoor fan L)
1. Check the charged amount of refrigerant gas.
(Gas shortage ® gas supplement, check for gas leaks)
2. Indoor fan locked.

Fault code = 18
Fault = DEFROST SENSOR (TE)
Out of place, break, shortcircuit.
Full stop
1. Check the defrosting sensor.
2. Check the outdoor PC board

Fault code = 19
Fault = OUTDOOR HEAT-EXCHANGER SENSOR (TL)
Out of place, break, short-circuit.
Full stop
1. Check the outdoor heat-exchanger sensor.
2. Check the outdoor PC board

Fault code = 21
Fault = HIGH PRESSURE SWITCH
High pressure switch does not reset. (5 sec in cooling 30 sec in heating)
Full stop
1. Check the high pressure switch.
2. Check the outdoor PC board

Fault code = 1C
Fault = OTHER ABNORMALITY OF OUTDOOR UNIT
Compressor does not operate. Start once, but soon after stop by OCR
Full stop
1. Check the compressor.
2. Check the wiring of compressor. (lack of phase, short circuit)
3. Check the voltage.
4. Check the outdoor PC board.

Fault code = 99
Fault = WRONG WIRING OF REMOTE CONTROL UNIT
Indoor unit does not operate at all.
Full stop
1. Check the wiring between remote control unit and indoor unit.
2. Check the indoor unit PC board.

Fault code = 0b
Fault = FLOAT SWITCH
Outdoor unit stops
1. Fault in drain pump.
2. Drain pipe clogged.
3. Check for indoor PC board

* With drain pump
Read More ->>

Hitachi Error Codes

64 komentar

 10.2 ALARM CODES

If a Safety Device is activated, cutting out the compressor, the Run light on the Remote Control switch blinks continuously and ABNML is indicated on the LCD display.

The Unit Identification A* etc is shown along with the Code Number for the Fault that has occurred.

The Code Numbers relating to each type of Fault is shown below.


Heat Pump


Fault Code = 01

Fault = Safety Device (Indoor Unit)


Fault Code = 02

Fault = Safety Device (Outdoor Unit)


Fault Code = 03

Fault = Transmission Indoor/Outdoor Unit


Fault Code = 05 Phase Rotation

Fault =


Fault Code = 08

Fault = Compressor High Temperature


Fault Code = 11

Fault = Air Inlet Thermistor


Fault Code = 12

Fault = Air Outlet Thermistor


Fault Code = 13

Fault = Freeze Protection Thermistor


Fault Code = 20

Fault = Compressor Thermistor


Fault Code = 22

Fault = Ambient Air Thermistor


Fault Code = 24

Fault = Defrost Thermistor


Fault Code = 25

Fault = Condensing Temperature Thermistor


Fault Code = 38

Fault = PCB Protection Circuit


Fault Code = 41

Fault = Overload Operation for Cooling


Fault Code = 42

Fault = Overload Operation for Heating



The LED’s 1-4 on the Outdoor Unit PCB will also light up according to the following table to indicate the fault which has occurred.


Fault Code = Normal

LED1 =

LED2 =

LED3 =

LED4 =


Fault Code = 01

LED1 = *

LED2 =

LED3 =

LED4 =


Fault Code = 02

LED1 =

LED2 = *

LED3 =

LED4 =


Fault Code = 03

LED1 =

LED2 =

LED3 = *

LED4 =


Fault Code = 05

LED1 =

LED2 =

LED3 =

LED4 = *


Fault Code = 08

LED1 = *

LED2 = *

LED3 = *

LED4 =


Fault Code = 20

LED1 = *

LED2 =

LED3 =

LED4 = *


Fault Code = 22

LED1 = *

LED2 = *

LED3 =

LED4 =


Fault Code = 24

LED1 = *

LED2 =

LED3 = *

LED4 =


Fault Code = 38

LED1 =

LED2 = *

LED3 = *

LED4 =


Fault Code = 41

LED1 = *

LED2 = *

LED3 =

LED4 =


Fault Code = 42

LED1 =

LED2 = *

LED3 = *

LED4 = *


Fault Code = 11-13

LED1 = *

LED2 = *

LED3 = *

LED4 = *




Cooling Only


Fault code = 02

Fault = Safety Device (Indoor or Outdoor Unit)


Fault code = 11

Fault = Air Inlet Thermistor


Fault code = 13

Fault = Freeze Protection Thermistor


Fault code = 38

Fault = PCB Protection Circuit


The reason for the failure should be traced and rectified as early as possible. The unit may then be restarted by pressing the Run/Stop button.


Read More ->>

Thursday, October 21, 2010

LG Fault Code

259 komentar
for all wall mounted and Artcool split system codes

Error code = C1 or CH1
Flashing Light = 1
Fault = Indoor temperature sensor open or closed circuit.
Display = Indoor.
Indoor Operation = ON

Error code = C2 or CH2
Flashing Light = 2
Fault = Outdoor temperature sensor open or closed circuit.
Display = Indoor Outdoor.
Indoor Operation = ON

Error code = C4 or CH4
Flashing Light = 4
Fault = Heat sink temperature sensor open or closed circuit.
Display = Indoor Outdoor.
Indoor Operation = ON

Error code = C5 or CH5
Flashing Light = 5
Fault = Communication between indoor and outdoor units.
Display = Indoor Outdoor
Indoor Operation = OFF

Error code = C6 or CH6
Flashing Light = 6
Fault = Excessive current at inverter DC power circuit.
Display = Indoor Outdoor
Indoor Operation = SHUTDOWN

Error code = C7 or CH7
Flashing Light = Excessive compressor current
Fault = 7
Display = Indoor Outdoor
Indoor Operation = SHUTDOWN

Error code = C8 or CH8
Flashing Light = 8
Fault = Indoor fan not rotating.
Display = Indoor
Indoor Operation = OFF

Error code = C9 or CH9
Flashing Light = 9
Fault = Outdoor fan not rotating.
Display = Indoor Outdoor
Indoor Operation = OFF

Error code = CA
Flashing Light = 10
Fault = 1. Discharge temp more than130 °C 2. Faulty discharge thermistor
Display = Indoor Outdoor
Indoor Operation = ON

Error code = CC
Flashing Light = 2+1
Fault = EEPROM error
Display = Outdoor
Indoor Operation = ON

Error code = CD
Flashing Light = 3+1
Fault = Inverter module error
Display = Outdoor
Indoor Operation = ON

Error code = Po
Flashing Light =
Fault = System in Power Mode – not a fault
Display = Indoor
Indoor Operation =

Error code = Lo
Flashing Light =
Fault = System in test mode – not a fault
Display = Indoor
Indoor Operation =


LG Air Conditioning Universal & Multi Split Fault Codes Sheet
Error Code = 01
Contents = Air sensor (open/short)
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 02
Contents = Inlet pipe sensor
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 03
Contents = Communication(Indoor Wired R/Control)
Case Of Error = Communication Poorly
Indoor Status = Off

Error Code = 04
Contents = Drain pump / Float switch
Case Of Error = Float switch Open circuit (High level water alarm)
Indoor Status = Off

Error Code = 05
Contents = Communication(Indoor Outdoor)
Case Of Error = Communication Poorly
Indoor Status = Off

Error Code = 06
Contents = Outlet pipe sensor
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 07
Contents = Different operation mode
Case Of Error = Indoor units set in different operation modes
Indoor Status = Off

Error Code = HL
Contents = High Limit (Float Switch)
Case Of Error = Same as code 04, Float switch Open circuit
Indoor Status = Off


Error Code = CL
Contents = Child Lock Function selected
Case Of Error = Not an error, press Timer & Min buttons simultaneously for 3 seconds to toggle On/Off
Indoor Status = On


Error Code = 21
Contents = IPM Fault (Compressor Over current)
LED01G = 2 times
(Red)
LED02G = 1 time
(Green)
Case Of Error = Compressor malfunction, IPM Fault
Outdoor Status = Off

Error Code = 22
Contents = CT 2 (Max. Current)
LED01G = 2 times
(Red)
LED02G = 2 times
(Green)
Case Of Error = Current is 14A
Outdoor Status = Off

Error Code = 23
Contents = DC Link Low Volt.
LED01G = 2 times
(Red)
LED02G = 3 times
(Green)
Case Of Error = DC Link volt. Is 140V
Outdoor Status = Off


Error Code = 24
Contents = Low / High Pressure
LED01G = 2 times
(Red)
LED02G = 4 times
(Green)
Case Of Error = Low / High press switch OPEN
Outdoor Status = Off

Error Code = 25
Contents = AC Low / AC High Volts.
LED01G = 2 times
(Red)
LED02G = 5 times
(Green)
Case Of Error = Abnormal AC volt. Input.
Outdoor Status = Off

Error Code = 26
Contents = DC Compressor Position
LED01G = 2 times
(Red)
LED02G = 6 times
(Green)
Case Of Error =
Outdoor Status = Off

Error Code = 27
Contents = PSC Fault (Reactor)
LED01G = 2 times
(Red)
LED02G = 7 times
(Green)
Case Of Error =
Outdoor Status = Off

Error Code = 28
Contents = DC Link High Volts
LED01G = 2 times
(Red)
LED02G = 8 times
(Green)
Case Of Error = Off
Outdoor Status = Off

Error Code = 32
Contents = Discharge Pipe Temp. High (INV)
LED01G = 3 times
(Red)
LED02G = 2 times
(Green)
Case Of Error = Off
Outdoor Status = Off

Error Code = 33
Contents = Discharge Pipe Temp. High (Cons.)
LED01G = 3 times
(Red)
LED02G = 3 times
(Green)
Case Of Error = Off
Outdoor Status = Off

Error Code = 40
Contents = CT Circuit
LED01G = 4 times
(Red)
LED02G =
(Green)
Case Of Error = CT Circuit malfunction
Outdoor Status = Off

Error Code = 41
Contents = D-Pipe sensor INV. (Open/Short)
LED01G = 4 times
(Red)
LED02G = 1 time
(Green)
Case Of Error = Open / Short circuit.
Outdoor Status = Off

Error Code = 44
Contents = Air sensor (Open/Short)
LED01G = 4 times
(Red)
LED02G = 4 times
(Green)
Case Of Error = Open / Short circuit.
Outdoor Status = Off

Error Code = 45
Contents = Cond. Pipe Sensor (Open/Short)
LED01G = 4 times
(Red)
LED02G = 5 times
(Green)
Case Of Error = Open / Short circuit.
Outdoor Status = Off

Error Code = 46
Contents = Suction Pipe Sensor (Open/Short)
LED01G = 4 times
(Red)
LED02G = 6 times
(Green)
Case Of Error = Open / Short circuit
Outdoor Status = Off

Error Code = 47
Contents = D-pipe Sensor Cons. (Open/Short)
LED01G = 4 times
(Red)
LED02G = 7 times
(Green)
Case Of Error = Open / Short circuit
Outdoor Status = Off

Error Code = 48
Contents = D-Pipe & Air Sensor (Open)
LED01G = 4 times
(Red)
LED02G = 8 times
(Green)
Case Of Error = Dual Sensor unplugged
Outdoor Status = Off

Error Code = 51
Contents = Over Capacity
LED01G = 5 times
(Red)
LED02G = 1 times
(Green)
Case Of Error = Over Load Combination
Outdoor Status = Off

Error Code = 52
Contents = Communication Error (Main micom Sub micom)
LED01G = 5 times
(Red)
LED02G = 2 times
(Green)
Case Of Error = Poor/Loss of Communication
Outdoor Status = 0ff

Error Code = 53
Contents = Communication Error (Indoor Outdoor)
LED01G = 5 times
(Red)
LED02G = 3 times
(Green)
Case Of Error = Poor/Loss of Communication
Outdoor Status = Off

Error Code = 54
Contents = Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase
LED01G = 5 times
(Red)
LED02G = 4 times
(Green)
Case Of Error = Incorrect Wiring
Outdoor Status = Off

Error Code = 60
Contents = EEPROM Check Sum
LED01G = 6 times
(Red)
LED02G =
(Green)
Case Of Error = Check Sum Mis-Match
Outdoor Status = Off

Error Code = 61
Contents = Cond. Pipe Sensor Temp. High
LED01G = 6 times
(Red)
LED02G = 1 time
(Green)
Case Of Error = Cond. Temp. High
Outdoor Status = Off

Error Code = 62
Contents = Heat Sink Sensor Temp. High
LED01G = 6 times
(Red)
LED02G = 2 times
(Green)
Case Of Error = Heat Sink Temp. High
Outdoor Status = Off

Error Code = 63
Contents = Cond. Pipe Sensor Temp. Low
LED01G = 6 times
(Red)
LED02G = 2 times
(Green)
Case Of Error = Cond. Temp. Low
Outdoor Status = Off

Error Code = 65
Contents = Heat Sink Sensor (Open/Short)
LED01G = 6 times
(Red)
LED02G = 5 times
(Green)
Case Of Error = Open / Short circuit
Outdoor Status = Off

Error Code = 67
Contents = Outdoor BLDC Fan Loc
LED01G = 6 times
(Red)
LED02G = 7 times
(Green)
Case Of Error = Fan Motor/Circuit Problem
Outdoor Status = Off


Error Code = 73
Contents = PFC Fault Error (S/W)
LED01G = 7 times
(Red)
LED02G = 3 times
(Green)
Case Of Error = Inverter PCB input current is over 48A (Peak) for 2ms
Outdoor Status =

Error Code = 105
Contents = Comms. Error (Main board Fan board)
LED01G = 6 times
(Red)
LED02G = 5 times
(Green)
Case Of Error = Poor/Loss of Communication
Outdoor Status = Off

Fault code 01
Is a fault with the Indoor unit return air Thermistor, Unplug the Thermistor from the PCB
Check its Resistance of Air thermistor and check Voltage across Air thermistor

Fault code 02
Is a problem with the Indoor unit coil inlet Thermistor
Unplug the Thermistor from the indoor PCB, Check its Coil thermistor resistance k Ohms  and check Voltage across coil thermistor

Fault Code 03
Indicates a wiring error between the remote controller and the fan coil, this is most common in group control applications where more than 1 fan coil is connected to a single remote controller

Fault Code 04
Fault code CH04 indicates that the float switch of the fan coil has risen.
On fan coils without a drain pump it indicates that the jumper (blue plug with 30mm of blue wire) in terminal CN FLOAT is missing.
If the fan coil is running and the float rises it will take 3 ½ minutes for the fault to show on the controller, this is to give the unit time to pump excess water away. Once the float falls, (or the jumper is put back into the board) it will not be possible to clear the fault for 40 seconds. It is considered good practice to reset the power to clear this fault code.

Fault Code 05
These error codes indicate a communication fault between the indoor and outdoor units; it appears
approximately 5 minutes after powering up the system.
The communication between the units is a fluctuating DC voltage commonly called a serial signal, it can be easily lost if the wiring is not done correctly. If there is a communication error fault CH05 will appear on the Wired Remote within 5 mins of powering up the system.
Testing
First check for any isolator or switches on the interconnecting cable and ensure both the Comms and Neutral are un-switched. Then confirm connections are correct and secure at both the Indoor and Outdoor units.
Check if any other devices are connected on the interconnecting cable, remove such equipment, and connect them elsewhere.
Open the outdoor unit to reveal the Main PCB and identify the Green and Red LED’s on that board. The Green LED should be lit steadily if power is present, the Red LED should be doing one of the following:-
1. If the outdoor unit receives communications from the indoor unit, the Red LED should be flickering.
2. If the Red LED glows steadily without flickering, then no communication is being received from the indoor unit. Check the interconnecting cables for any short or open circuits, not forgetting the connecting cables between the terminal rail and PCB on both Indoor & Outdoor units. Repair wiring, or replace the Indoor PCB as necessary.
3. If the Red LED does not light at all, then the fault is with the outdoor PCB, or connections to it. Confirm that the Outdoor PCB is receiving power (Green LED lit). Repair wiring, or replace the Outdoor PCB as necessary.
4. If Condition 3 above applies please check the following and repair/replace as required. Failure to do so may result in the new PCB becoming damaged.
a. Check PCB Control Fuse, if blown, identify cause and rectify.
b. Check Fan Motor(s).
i. AC Motors for Short Circuits or Down to Earth.
ii. BLDC Motors (See Product Technical Update - Sheet 83).
c. Reversing Valve Coil, for Short Circuit or Down to Earth.
d. Reactor, for Open Circuit.
e. Electronic Expansion Valve Down to Earth (See Product Technical Update - Sheet 96).
f. Compressor, for Short Circuit or Down to Earth.
Additional Tests:
Set your meter to DC Volts, Test between terminals 2 and 3 of the outdoor unit and wiring terminals, you should see 0-75 Vdc, it will be fluctuating rapidly.
If this signal voltage is not present disconnect the wire from terminal 3 of the inter unit cabling, and test terminal 3 Voltage again. If Voltage is still not present, the outdoor PCB must be faulty.
If this signal voltage is detected leaving the outdoor unit, reconnect wire 3 and check what is being received at the indoor unit. Disconnect wire 3 from the indoor terminal block and check the DC Voltage between this wire and terminal 2. It should be the same as what you saw at the outdoor unit, if not your wiring is at fault.
With the wire still disconnected, check between terminals 2 & 3. You should see a relatively steady voltage in the range of 0.5 – 15Vdc (Negative). Any significant difference would indicate a faulty Indoor PCB.
Important: Comms Errors are also created on Universal “Synchro Systems” when they are not configured/commissioned correctly. Please follow the correct Synchro Commissioning Procedures

Fault code 06
Is a problem with the Indoor unit coil outlet Thermistor

Fault Code 07
On Multi split systems, the first unit switched on is the cool heat master, the master tells the condensing unit what to do. If the condenser is in heating and any slave is set to cooling a CH07 fault code will appear.
Likewise if the condenser is in cooling and any slave is set to heating a CH07 fault code will appear. If the master is switched off the next longest running unit becomes the master.
To clear the fault turn off the unit at the remote controller, turn it back on again and change the mode

Fault Code 09
Check for loose connections or dry joints where EEPROM connects on Main PCB, repair if possible, if not replace PCB.

Fault Code 10
Indoor Fan Motor problem, See Fault Code 67 for Troubleshooting help.

Fault Code 21
This fault is caused by an over current in the inverters DC power circuit. If the DC part of the circuit exceeds 14 Amps fault code 21 will be displayed.
This is caused by either the inverter PCB being faulty or compressor being short circuit or down to earth

Disconnect the electrical connections to the compressor and check the resistance of the compressor windings, measure from U to V, V to W and W to U the values should be between 0.25 and 5 Ohms each.

The next test is to measure the resistance of the compressor windings to earth.
Using a Megger (High Voltage Meter) measure the resistance from any of the 3 compressor terminals to an Earth point (pipe work).
The value should exceed 2 M Ohms.

If the compressors fail these tests it will need replacing.
If the compressor is OK you will need to check the inverter output voltages. Please see section on Inverter testing at end

Fault Code 22
This fault is caused by a Compressor over-current see code 21
Please see section on Inverter testing at the end

Fault Code 23
This fault indicates a fault in the DC part of the inverter circuit; it means that the Dc Voltage to the inverter is below 140 V Dc, it should be 370 V for single phase machines and 600 V dc for three phase machines. The fault is usually caused by the inverter charging resistor being faulty; this component is mounted on the outdoor unit PCB and cannot be replaced.
Start the unit running and measure the DC Voltage supply to the inverter. This is easiest to measure at the inverter capacitors; it should be 370 V for single phase machines and 600 V dc for three phase machines
See section on Inverter testing at the end.

Fault Code 24
If the unit has a low or high pressure fault CH24 will display.
If the LP switch goes open circuit the compressor will be stopped, on inverter units this can take up to 30 seconds. The LP Switch goes open circuit when the suction pressure falls below 0.5 bar the Hp Switch opens at 41 bar.
The fault code will only occur if the pressure switch is tripped 5 times within 1 hour, this can only be reset by switching off the power to the condensing unit for 2 minutes.
If your unit does not have any pressure switches it may still have a plug on the outdoor unit PCB labelled CN Press, it should have a link plugged in, if the link is missing it must be replaced.

Fault Code 25
This fault indicates a problem with the incoming power supply to the system.
Measure the Voltage of the incoming supply, if it is less than 140V AC or greater than 300V AC this fault will occur.
If the Power supply is correct and the fault persists replace the outdoor unit PCB.

Fault Code 26
This fault indicates a problem with the positioning system of the inverter compressor, which indicates a seized compressor.
Firstly check the compressor is correctly connected. Next reset the power supply to the system ensuring the power is left off for 5 minutes. Start the unit up, after a couple of minutes the compressor will try and start, you can hear a high pitched whine when it does. If the compressor does not start turning within a couple of seconds the whining will stop. The compressor will try to start 3 times then the fault will recur.

Fault Code 27
This fault indicates a problem with the inverter module, see section on testing inverters. Also check reactor is connected to the PCB and check its resistance it should be well under 1 Ohm.

Fault Code 28
This fault indicates a problem in the DC part of the inverter circuit; it means that the DC Voltage to the inverter is too high.
Start the unit running and measure the DC Voltage supply to the inverter. This is easiest to measure at the inverter capacitors; it should be 370 V for single phase machines and 600 V dc for three phase machines. See section on Inverter testing at end.

Fault Code 29
Check and correct for any:
1. Overload operation (Pipe restrictions / Restricted Airflow / EEV defect / Refrig. Overcharged)
2. Compressor damage (Insulation damage / Motor damage)
3. Input Voltage Low
4. ODU Inverter PCB assembly damage

Fault Code 32
Indicates that the Inverter compressor discharge temperature is high (above 105ºC) this usually indicates the system has either a shortage of refrigerant or a blockage in the system.
Reset the power to the unit for 2 minutes and restart it. If the compressor starts measure the compressor discharge temperature, typically it should not be more than 50ºC above the ambient temperature around the condensing unit. It may take quite a long period for the compressor to overheat so don’t just start the unit and run. Make sure you check the unit is operating correctly and providing adequate cooling.

Fault Code 33
Indicates that the fixed speed compressor discharge temperature is high (above 105ºC) this usually indicates the system has either a shortage of refrigerant or a blockage in the system.
Reset the power to the unit for 2 minutes and restart it, If the compressor starts measure the compressor discharge temperature, typically it should not be than 50ºC above the ambient temperature around the condensing unit. It may take quite a long period for the compressor to overheat so don’t just start the unit and run. Make sure you check the unit is operating correctly and providing adequate cooling

Fault Code 39
Check and repair or replace as necessary:
1. PCB defect / Wiring defect
2. Different Micom Software Version
3. ODU Inverter PCB assembly damage

Fault Code 40
This fault indicates a problem with the current drawn by the AC part of the inverter circuit.
Refer to the inverter testing procedure at the end.

Fault Code 41
This fault indicates an Inverter Compressor discharge Thermistor fault
Unplug the Thermistor and Check its resistance

Fault Code 44
Indicates a fault with the Outdoor unit air Thermistor
Unplug the Thermistor from the PCB and Check its resistance

Fault Code 45
Indicates a problem with the condenser coil outlet Thermistor
Unplug the Thermistor from the indoor PCB and Check its resistance

Fault Code 46
Indicates a problem with the compressor suction Thermistor
Unplug the Thermistor from the indoor PCB and Check its resistance

Fault Code 47
Indicates an Inverter Compressor discharge Thermistor fault
Unplug the Thermistor from the PCB and Check its resistance

Fault Code 48
This fault indicates that the compressor discharge sensor and the condenser air temperature sensors are both unplugged. Both these sensors are connected to a single connector on the outdoor unit PCB, plug it in and the fault will go away.

Fault Code 51
This indicates that the capacity of the indoor unit / units is too great for the condensing unit. Make a note of the model number of the fan coil/coils and the condensing unit and check with the equipment supplier that the units you have installed can be connected together.

Fault Code 52
This fault code indicates a communication error between the Main and Sub micom (CPU’s) on the outdoor unit main PCB. Check for evidence of damage, if none found reset power, if fault reappears replace pcb.

Fault Code 53, (see fault code 05)

Fault Code 54
This fault normally indicates a lost phase or the phases are reversed on the power supply to 3 phase units.
Check all 3 phases are available at the power terminals to the unit. You should have 415v AC across red to blue, blue to yellow and red to yellow, If this is all ok turn off the power and swap the red and yellow cores of the power supply cable over, reset the power and the unit will operate.

Fault Code 60
Check the correct PCB assembly has been installed, check for dry joints, replace outdoor unit PCB if nothing is found.

Fault Code 61
Indicates the outdoor unit condenser coil temperature is high above 65ºC, this will usually be experienced in cooling mode and will indicate insufficient air being drawn over the coil.
Check there are no blockages to the coil (carrier bags dirt etc); check the air flow is not short circuiting from the front to the back of the unit and check for Nitrogen in the system

Fault Code 62
Indicates the outdoor unit Inverter heat-sink thermistor has detected that the heat sink is overheating 85ºC.
This is usually caused by debris blocking the heat-sink fins or an error with the thermistor, see code 65

Fault Code 65
Is a problem with the Inverter PCB heat sink thermistor for the heat sink on the outdoor unit PCB, unplug the Thermistor from the PCB and Check its resistance

Fault Code 67
This is a problem with the Outdoor Fan Motor, where rotation is not detected, and could be result of either Mechanical or Electrical failure.
· Check that motor is free to rotate and not seized.
· Check the motor is electrically sound, windings not Open or Short circuit.
· Check power output from PCB to fan motor.
· Check rotation feedback circuit.
More modern units use inverter fan motors, which are powered by a DC Voltage.
In reality these fan motors are AC fan motors with a small inverter-type circuit build inside. This inverter circuit is integrated with the fan motor and impossible to replace, you have to replace the entire fan motor.
Similar to inverter-controlled compressors, the speed of these fan motors can be changed to whatever is needed (within certain limits). In practice the change in fan speed is not ‘continuous’ but certain fixed speeds have been programmed inside the AC unit.
This type of fan control can be recognized by the 5 wires coming from the fan on a connector with 7 possible connections
These fan motors have 5 connections, power supply is 360VDC, and the speed is determined by a voltage ranging from 0 (0 rpm) to 5VDC (max speed) and a power supply for the internal electronics of 15VDC.
These motors are easy to identify from a wiring diagram, they always show them not connected to anything as the electronics are too difficult to draw on the diagram.

Detail of Hall Sensors
A Hall effect sensor works like a magnetic reed switch, one end is wired to a 15 Vdc supply and the other is the feed back to the PCB. As a magnet mounted on the rotor of the motor passes the hall sensor the reed switch closes momentarily and allows the DC signal to flow through it back to the PCB. The hall sensors have a resistance so the voltage fed back to the PCB will only be approximately 12V DC.
The pcb will know what speed the fan motor should be turning as it is also controlling the output of the inverter, if there is a discrepancy between the inverter output RPM and the feedback from the hall sensors a fault will occur. Usually the fan will rev very fast for a few seconds then stop this indicates hall sensor problems.
Replace either Motor or Fan PCB as necessary

Fault Code 73
Check and repair or replace as necessary:
1. Overload operation (Pipe restrictions / Restricted Airflow / EEV defect / Refrig. Overcharged)
2. Compressor damage (Insulation damage / Motor damage)
3. Input Voltage abnormal
4. Power supply wiring abnormal
5. Inverter PCB assembly damage

Fault Code 105
This is due to a Communication error between the Main outdoor PCB and Fan PCB.
· Check for Open/Short of communication line between the Main and Fan PCB’s.
· Check communication cable plug connections.
· Is the communication LED on?



















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