Sunday, October 31, 2010

Fujitsu Air Conditioner Error Codes

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Fujitsu Air Conditioner Hardwired Remote Controller System Error Codes.
When EE:EE is displayed on remote control , press “Energy Save” &
“Zone Control” buttons simultaneously for longer than 3 secs.
The error code will then be displayed on the LCD.


Code Fault
E0:00 Coms error - indoor to remote
E1:00 Coms error - indoor to outdoor
E2:00 Return air thermistor open circuit
E3:00 Return air thermistor short circuit
E4:00 Indoor coil thermistor open
E5:00 Indoor coil thermistor shorted
E6:00 Outdoor coil thermistor open
E7:00 Outdoor coil thermistor shorted
EA:00 Outdoor ambient thermistor open
Eb:00 Outdoor ambient thermistor shorted
Ec:00 Discharge pipe themistor open
Ed:00 Discharge pipe thermistor shorted
EE:00 High Pressure problem
EF:00 Discharge pipe temp. Problem - too high = short of gas
Press “Energy Save” & “Zone Control” buttons simultaneously for longer
than 3 secs to return to normal operating mode


(1) Stop the air conditioner operation.
(2) Press the master control button and the fan control button simultaneously for 2 seconds or more to start the test run
(3) Press the start/stop button to stop the test run



[SELF-DIAGNOSIS]
When the error indication E:EE is displayed, follow the following items
to perform the self-diagnosis. E:EE indicates an error has occurred.

1. REMOTE CONTROLLER DISPLAY
1) Stop the air conditioner operation.
2) Press the set temperature buttons simultaneously for 5 seconds or more to start the self-diagnosis.
Refer to the following tables for the description of each error code
(3) Press the set temperature buttons simultaneously for 5 seconds or more to stop the self-diagnosis.



Error code = 00
Error contents = Communication error (indoor unit to remote controller)

Error code = 01
Error contents = Communication error (indoor unit to outdoor unit)

Error code = 02
Error contents = Room temperature sensor open

Error code = 03
Error contents = Room temperature sensor short-circuited

Error code = 04
Error contents = Indoor heat exchanger temperature sensor open

Error code = 05
Error contents = Indoor heat exchanger temperature sensor shortcircuited

Error code = 06
Error contents = Outdoor heat exchanger temperature sensor open

Error code = 07
Error contents = Outdoor heat exchanger temperature sensor shortcircuit

Error code = 08
Error contents = Power source connection error

Error code = 09
Error contents = Float switch operated

Error code = 0A
Error contents = Outdoor temperature sensor open

Error code = 0b
Error contents = Outdoor temperature sensor short-circuited

Error code = 0c
Error contents = Discharge pipe temperature sensor open

Error code = 0d
Error contents = Discharge pipe temperature sensor short-circuited

Error code = 0E
Error contents = Outdoor high pressure abnormal

Error code = 0F
Error contents = Discharge pipe temperature abnormal

Error code = 11
Error contents = Model abnormal

Error code = 12
Error contents = Indoor fan abnormal

Error code = 13
Error contents = Outdoor signal abnormal

Error code = 14
Error contents = Outdoor EEPROM abnormal

2. OUTDOOR UNIT LEDS
When the outdoor temperature drops, the outdoor units fans may switch
to low speed.
ERROR : HEAT & COOL MODEL (REVERSE CYCLE) ONLY
The LED lamps operate as follows according to the error contents.




These pages cover the current Inverter product range.
They also cover the ARY60U, ARY54U Single and AOY19/24F/U Multi Systems.

Models with Wireless Controllers
Trouble Shooting from the Indoor Unit

Wall Mounted Single Systems ASY, ASYA & ASYB
Includes AWYZ Nokria Models



Red Light Operation = Off
Green Light Timer = 2 Flashes
Reverse Comms Fail at Startup

Red Light Operation = Off
Green Light Timer = 3 Flashes
Reverse Comms Fail In Use

Red Light Operation = Off
Green Light Timer = 4 Flashes
Forward Comms Fail at Startup

Red Light Operation = Off
Green Light Timer = 5 Flashes
Forward Comms Fail In Use

Red Light Operation = Off
Green Light Timer = 8 Flashes
Wired Remote Control Failure

Red Light Operation = 2 Flashes
Green Light Timer = 2 Flashes
Indoor Air Sensor Fail

Red Light Operation = 2 Flashes
Green Light Timer = 3 Flashes
Indoor Pipe Sensor Fail

Red Light Operation = 3 Flashes
Green Light Timer = 2 Flashes OD
Disch Sensor Fail

Red Light Operation = 3 Flashes
Green Light Timer = 3 Flashes OD
Pipe Sensor Fail

Red Light Operation = 3 Flashes
Green Light Timer = 4 Flashes OD
Air Sensor Fail

Red Light Operation = 3 Flashes
Green Light Timer = 8 Flashes
Compressor Temp Sensor Fail

Red Light Operation = 4 Flashes
Green Light Timer = 2 Flashes
Forced Auto Switch Welded

Red Light Operation = 4 Flashes
Green Light Timer = 3 Flashes
Main Relay Welded

Red Light Operation = 4 Flashes
Green Light Timer = 4 Flashes
Power Failure

Red Light Operation = 4 Flashes
Green Light Timer = 7 Flashes
VDD Permament Stop Protection

Red Light Operation = 4 Flashes
Green Light Timer = 8 Flashes
Reverse VDD Permament Stop

Red Light Operation = 5 Flashes
Green Light Timer = 2 Flashes
Current Trip

Red Light Operation = 5 Flashes
Green Light Timer = 3 Flashes
CT Abnormal

Red Light Operation = 5 Flashes
Green Light Timer = 5 Flashes
Compressor Failure

Red Light Operation = 5 Flashes
Green Light Timer = 6 Flashes
Outdoor Fan Failure

Red Light Operation = 6 Flashes
Green Light Timer = 2 Flashes
ID Fan Motor Locked

Red Light Operation = 6 Flashes
Green Light Timer = 3 Flashes
ID Fan Motor Rotation Error

Red Light Operation = 7 Flashes
Green Light Timer = 2 Flashes
High Discharge Temperature

Red Light Operation = 7 Flashes
Green Light Timer = 3 Flashes
High Pressure

Red Light Operation = 7 Flashes
Green Light Timer = 5 Flashes
Pressure Switch Fail

Red Light Operation = 8 Flashes
Green Light Timer = 2 Flashes
Active Filter AFM Fail 1st Time

Red Light Operation = 8 Flashes
Green Light Timer = 3 Flashes
Active Filter AFM Fail 2nd Time

Red Light Operation = 8 Flashes
Green Light Timer = 4 Flashes
PFC Circuit Error

Red Light Operation = Blinking
Green Light Timer = Blinking
PCB Failure

All Other Wireless Indoor Units AUY, ABY & AWY Models
Including Multi Systems (Not J Series or VRF)


Red Light operation = On
Green Light Timer =
Yellow Light Swing =
Normal

Red Light operation = On
Green Light Timer = Slow Blink
Yellow Light Swing = Slow Blink
Test

Red Light operation = Blinks
Green Light Timer = Blinks
Yellow Light Swing = Off
ID PCB Fail

Red Light operation = Blinks
Green Light Timer = Blinks
Yellow Light Swing = Blinks
OD PCB Fail

Red Light operation = Blinks
Green Light Timer = 2 Pulses
Yellow Light Swing = Off
OD Power Connection Failure

Red Light operation = Blinks
Green Light Timer =3 Pulses
Yellow Light Swing = Off
OD Unit Pipe Sensor Fail

Red Light operation = Blinks
Green Light Timer =4 Pulses
Yellow Light Swing = Off OD
Unit Air sensor Fail

Red Light operation = Blinks
Green Light Timer =4 Pulses
Yellow Light Swing = Blinks
OD Unit Air sensor Short

Red Light operation = Blinks
Green Light Timer = 5 Pulses
Yellow Light Swing = Off
OD Unit Disch Sensor Fail

Red Light operation = Blinks
Green Light Timer = 5 Pulses
Yellow Light Swing = Blinks
OD Unit Disch Sensor Short

Red Light operation = Blinks
Green Light Timer = 6 Pulses
Yellow Light Swing = Off
High Pressure

Red Light operation = Blinks
Green Light Timer = 7 Pulses
Yellow Light Swing = Off
High Discharge or Compressor Temp

Red Light operation = Blinks
Green Light Timer = 9 Pulses
Yellow Light Swing = Off
OD Unit Compressor Temp Sensor

Red Light operation = Blinks
Green Light Timer = 10 Pulses
Yellow Light Swing = Off
IPM Error

Red Light operation = Blinks
Green Light Timer = 11 Pulses
Yellow Light Swing = Off
CT Error

Red Light operation = Blinks
Green Light Timer = 12 Pulses
Yellow Light Swing = Off
AFM Filter Error

Red Light operation = Blinks
Green Light Timer = 13 Pulses
Yellow Light Swing = Off
Compressor Error

Red Light operation = Blinks
Green Light Timer = 14 Pulses
Yellow Light Swing = Off
OD Fan Motor Fail

Red Light operation = 2 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Off
Air Sensor Open

Red Light operation = 2 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Blinks
Air Sensor Closed

Red Light operation = 3 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Off
Pipe Sensor Open

Red Light operation = 3 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Blinks
Pipe Sensor Closed

Red Light operation = 4 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Off
Drain Problem

Red Light operation = 5 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Off
Communication Error

Red Light operation = 5 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Blinks
OD PCB or Wiring Error

Red Light operation = 6 Pulses
Green Light Timer = Blinks
Yellow Light Swing = Off
Indoor Fan Failure


Wall Mounted Multi Models
Initial Display
Red = 2 Flashes
Green = Blinks
Meaning = ID Sensor Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 2 Flashes
ID Air Sensor

Initial Display
Red = 2 Flashes
Green = Blinks
Meaning = ID Sensor Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 3 Flashes
ID Pipe Sensor

Initial Display
Red = 4 Flashes
Green = Blinks
Meaning = ID Control Error
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 2 Flashes
Manual Auto Button Error

Initial Display
Red = 4 Flashes
Green = Blinks
Meaning = ID Control Error
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 4 Flashes
Power Source Failure

Initial Display
Red = 5 Flashes
Green = Blinks
Meaning = Comms Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 2 Flashes
Reverse Comms Failure

Initial Display
Red = 5 Flashes
Green = Blinks
Meaning = Comms Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 3 Flashes
Forward Comms Failure

Initial Display
Red = 6 Flashes
Green = Blinks
Meaning = ID Fan Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 2 Flashes
Motor locked

Initial Display
Red = 6 Flashes
Green = Blinks
Meaning = ID Fan Failure
Further Interrogation by Pressing Test Button on Infra Red RC
Red = Blinks
Green = 3 Flashes
Motor RPM Incorrect

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fail
Further Interrogation by Pressing Test Button on Infra Red RC
Red = 2 Flashes
Green = Blinks
OD Discharge Sensor Fail

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fai
Further Interrogation by Pressing Test Button on Infra Red RCl
Red = 4 Flashes
Green = Blinks
OD Pipe Sensor Fail

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fail
Further Interrogation by Pressing Test Button on Infra Red RC
Red = 6 Flashes
Green = Blinks
OD Air Sensor Fail

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fail
Further Interrogation by Pressing Test Button on Infra Red
Red = 8 Flashes
Green = Blinks
Compressor Temp Sensor Fail

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fail
Further Interrogation by Pressing Test Button on Infra Red
Red = 9 Flashes
Green = Blinks
2 Way Valve Sensor Fail

Initial Display
Red = Blinks
Green = 2 Flashes
Meaning = OD Thermistor Fail
Further Interrogation by Pressing Test Button on Infra Red
Red = 10 Flashes
Green = Blinks
3 Way Valve Sensor Fail

Initial Display
Red = Blinks
Green = 3 Flashes
Meaning = Pressure Switch
Red = 2 Flashes
Green = Blinks
Pressure Switch

Initial Display
Red = Blinks
Green = 4 Flashes
IMeaning = D Units Incorrect
Further Interrogation by Pressing Test Button on Infra Red
Red = 2 Flashes
Green = Blinks
Incorrect Indoor Unit Index

Initial Display
Red = Blinks
Green = 5 Flashes
Meaning = Inverter Failure
Further Interrogation by Pressing Test Button on Infra Red
Red = 2 Flashes
Green = Blinks
IPM Failure

Initial Display
Red = Blinks
Green = 5 Flashes
Meaning = Inverter Failure
Further Interrogation by Pressing Test Button on Infra Red
Red = 5 Flashes
Green = Blinks
Compressor Failure


Indoor unit 
ASYG07LMCA
ASYG09LMCA
ASYG12LMCA
Outdoor unit
AOYG07LMCA
AOYG09LMCA
AOYG12LMCA

Error = Serial communication error
Operation = 1 flash (0.5s on / 0.5s off)
Timer = 1 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Indoor unit PCB model information error
Operation = 3 flash (0.5s on / 0.5s off)
Timer = 2 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Manual auto switch error
Operation = 3 flash (0.5s on / 0.5s off)
Timer = 5 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Room temp. sensor error
Operation = 4 flash (0.5s on / 0.5s off)
Timer = 1 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Indoor unit Heat Ex. Middle temp.sensor error
Operation = 4 flash (0.5s on / 0.5s off)
Timer = 2 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Indoor unit fan motor error
Operation = 5 flash (0.5s on / 0.5s off)
Timer = 1 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Indoor unit error
Operation = 5 flash (0.5s on / 0.5s off)
Timer = 15 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Outdoor unit main PCB model information error or communication error
Operation = 6 flash (0.5s on / 0.5s off)
Timer = 2 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Inverter error
Operation = 6 flash (0.5s on / 0.5s off)
Timer = 3 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Active filter error, PFC circuit error
Operation = 6 flash (0.5s on / 0.5s off)
Timer = 4 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Trip terminal L error
Operation = 6 flash (0.5s on / 0.5s off)
Timer = 5 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Display PCB microcomputers communication error
Operation = 6 flash (0.5s on / 0.5s off)
Timer = 10 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Discharge temp. sensor error
Operation = 7 flash (0.5s on / 0.5s off)
Timer = 1 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Outdoor unit Heat Ex. liquid temp. sensor error
Operation = 7 flash (0.5s on / 0.5s off)
Timer = 3 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Outdoor temp. sensor error
Operation = 7 flash (0.5s on / 0.5s off)
Timer = 4 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Current sensor error
Operation = 8 flash (0.5s on / 0.5s off)
Timer = 4 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Trip detection
Operation = 9 flash (0.5s on / 0.5s off)
Timer = 4 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Compressor rotor position detection error
Operation = 9 flash (0.5s on / 0.5s off)
Timer = 5 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = 4-way valve error
Operation = 9 flash (0.5s on / 0.5s off)
Timer = 9 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)

Error = Discharge temp. error
Operation = 10 flash (0.5s on / 0.5s off)
Timer = 1 flash (0.5s on / 0.5s off)
Economy = Rapid flash (0.1s on / 0.1s off)


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Sanyo SPW error codes

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Sanyo SPW error codes

E01 Error in receiving serial communication signal (Signal from main indoor unit in case of group control) Auto address is not completed Outdoor system address, indoor system address, or indoor unit individual/main/sub setting is not set (Automatic address setting is not completed)

E02 Error in transmitting serial communication signal

E03 Indoor unit is detecting error signal from remote controller (and system controller)

E08 Indoor unit address setting is duplicated

E09 Remote controller setting is duplicated

E10 Error in transmitting serial communications signal

E11 Main unit duplication in simultaneous-operation multi control (detected by outdoor unit)

E14 Error in receiving serial communications signal

E04 Error in transmitting serial communications signal

E05 Error in receiving serial communications signal (including unit quantity verification failure)

E06 Error in transmitting serial communications signal

E07 Indoor unit capacity too low

E15 Indoor unit capacity too high

E16 No indoor units connected

E20 Error in transmitting serial communications signal

E17 Error in receiving serial communications signal

E18 Communications failure with MDC

E31 Indoor unit group settings error

L01 Indoor/outdoor unit type mismatch

L02 Main unit duplication in group control (detected by indoor unit)

L03 Outdoor unit address duplication (system address)

L04 Group wiring connected for independent indoor unit

L07 Address not set or group not set

L08 Indoor unit capacity not set

L09 Outdoor unit capacity not set or setting error

L10 Miswiring in group control wiring

L11 Indoor unit type setting error (capacity)

L13 Ceiling panel connection failure

P09 Fan protective thermostat

P01 Float switch

P10 Discharge temperature trouble

P03 Open phase detected, AC power trouble

P05 No gas

P15 4-way valve locked

P19 High cooling load

P20 Outdoor fan trouble

P22 Inverter compressor trouble (HIC PCB)

P26 Inverter compressor trouble (MDC)

P29 Simultaneous-operation multi control trouble

P31 Compressor current failure (overload)

H01 Indoor heat exchanger temperature sensor (E1)

F01 Indoor heat exchanger temperature sensor (E2)

F02 Indoor temperature sensor

F10 Discharge temperature (TD)

F04 Outdoor heat exchanger temperature (C1)

F06 Outdoor heat exchanger temperature (C2)

F07 Outdoor air temperature (TO)

F08 Intake temperature (TS)

F12 Indoor EEPROM error

F29 Outdoor EEPROM error

F31 Outdoor EEPROM error

































Remote controller alarm displayAlarm contentsJudgment conditionClear conditionJudgment and correction
PO3
Abnormal discharge temperature •Discharge temp. detected at or above the specified valueStops when temp. exceeds 111°C. Recovery at restart1. Check refrigerant cycle (gas leak). 2. Electronic control valve trouble 3. Check tubing sensor (TD).
P05 Missing phase detected. (CT disconnected or AC power trouble) Current value sent from MDC on outdoor unit control PCB is low. No AC power input for 3 minutes or longer: pre-trip - 5 Recovery at restart 1. Check R/S/T power. 2. Check inverter control PCB. 3. Check outdoor unit control PCB.
P15nsufficient gas level detected. The following conditions continue for 1 minute. •Discharge temp. is 95°C or higher. •Electronic control valve is at step 480. •Current value from MDC is 1.7 A (3-phase) or 1.0 A (1-phase) or less. Recovery at restart Check refrigerant cycle (gas leak).
P194-way valve locked •Judgment occurs after compressor has been ON for 5 minutes. Indoor heat exchanger temp. drops although compressors are ON in heating mode: [min(E1, E2)] ≤10°C. Indoor heat exchanger temp. rises although compressors are ON in cooling mode: E2 ≥40°CRecovery at restart 1. Check 4-way valve. 2. Check 4-way valve wiring. 3. Check outdoor unit control PCB.
P20High-pressure protection trouble detected from cooling high-load C2 temp.Temp. exceeds 64°C and subsequently does not drop to 55°C or below. •Continuously for 30 seconds →Alarm is output when this occurs once. •Continuously for less than 30 seconds →Inverter stops.Recovery at restart1. Refrigerant cycle overload operation 2. Outdoor coil temperature sensor C2
P22Outdoor unit fan motor trouble •Inverter protection circuit was activated, or lock was detected, at outdoor unit fan motor.Inverter stops after alarm is detectedRecovery at restart1. Position detection trouble 2. Overcurrent protection circuit at outdoor unit fan motor was activated. •Check outdoor unit control PCB. •Refer to outdoor unit fan judgment methods.
P26Inverter protection circuit was activated, or G-Tr short-circuit (short time: 0.8 s or less) in inverter control nverter stops after alarm is detected. Alarm is output when inverter stops (pre-trip) consecutively 4 times.Recovery at restart1. Stops immediately when restarted. •Layer short in the compressor 2. Check inverter control PCB. •Wiring trouble
P29Current detection circuit trouble •AC current value is high even when compressor is stopped.Inverter stops after alarm is detected. Alarm is output when inverter stops (pre-trip) consecutively 4 times.Recovery at restart 1. Stops immediately when restarted. •Layer short in the compressor 2. Check inverter control PCB. •Wiring trouble

Compressor motor output trouble, Inverter compressor trouble, MDC trouble Inverter stops after alarm is detected. Recovery at restart1. Refrigerant cycle trouble, overload operation 2. Loose screws and contact failure between HIC control PCB and radiating plate 3. Cooling failure of radiating plate 4. Check outdoor unit PCB wiring.

Compressor does not run. (Overcurrent protection circuit activates after a certain period of time following compressor start.) Inverter stops after alarm is detected. Recovery at restart1. Compressor trouble (locked, etc.) •Replace the compressor. 2. Compressor wiring trouble (missing phase)

Compressor breakdown •Starts to operate but operating frequency drops and compressor stops.Inverter stops after alarm is detected.Recovery at restart1. Check power voltage: AC 200 V ±20 V. 2. Refrigerant cycle overload operation 3. Check AC current detection circuit.

Inverter control PCB position detection circuit troubleInverter stops after alarm is detected.Recovery at restartPosition detection circuit is activated even when the compressor 3P connector is disconnected and the compressor operated. • Replace the inverter control PCB.
F04Disconnection, open circuit, or short circuit in discharge temp. sensor (TD)Sensor detection trouble (90°C or higher when 15 minutes have elapsed after compressor stopped). (Open circuit)Automatic recovery1. Check discharge temp. sensor (TD). 2. Check outdoor unit control PCB.
F06Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C1)Open circuit or short circuitAutomatic recovery1. Check outdoor heat exchanger temp. sensor (C1). 2. Check outdoor unit control PCB
F07Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C2)Open circuit or short circuitAutomatic recovery1. Check outdoor heat exchanger temp. sensor (C2). 2. Check outdoor unit control PCB.
F08Disconnection, open circuit, or short circuit in outdoor air temp. sensor (TO)Open circuit or short circuitAutomatic recovery1. Check outdoor air temp. sensor (TO). 2. Check outdoor unit control PCB.
F12Disconnection, open circuit, or short circuit in intake temp. sensor (TS)Open circuit or short circuitAutomatic recovery1. Check intake temp. sensor (TS). 2. Check outdoor unit control PCB.
F31EEPROM trouble Reading/writing failureRecovery at power reset1. Check EEPROM (IC901). 2. Check outdoor unit control PCB.
L02Mismatch of indoor and outdoor unit types (Espacio, Multi, GHP)Indoor unit judges that type does not match outdoor unit type.Recovery at power reset 1. Check indoor unit EEPROM. 2. Check indoor unit control PCB
L04Settings failureDuplicated outdoor unit address (system address)Automatic recovery1. Check outdoor unit system address. 2. Check inter-unit control wiring.
L07Settings failureGroup control wiring is connected to an independent-control indoor Recovery at power reset1. Check inter-unit control wiring. 2. Check indoor unit EEPROM.
L10Settings failureOutdoor unit capacity not set. Recovery at power resetCheck outdoor unit EEPROM.
L13Indoor-outdoor unit types Outdoor unit judges that type does not match indoor unit type.Recovery at power reset 1. Check indoor unit EEPROM. 2. Check outdoor unit control PCB.
E06Outdoor unit detected abnormal signal from indoor unit.Serial signal receiving failure (including failure to verify No. of units)Automatic recovery 1. Check inter-unit control wiring. 2. Check outdoor unit
E07Outdoor unit sending failure to indoor unitSerial signal sending failureAutomatic recovery1. Check inter-unit control wiring. 2. Check outdoor unit control PCB.
E14Settings failureDuplicated master unit in simultaneous-operation multi control (Detected by outdoor unit) Recovery at power reset1. Check inter-unit control wiring. 2. Check indoor unit combination.
E15Automatic address setting failureIndoor unit capacity too low.Recovery at power reset1. Check inter-unit control wiring. 2. Check outdoor unit control PCB.
E16Automatic address setting failureIndoor unit capacity too high.Recovery at power reset 1. Check inter-unit control wiring. 2. Check outdoor unit control PCB.
E20Automatic address setting failureOutdoor unit cannot receive any serial signals from indoor units.Recovery at power reset1. Check inter-unit control wiring. 2. Check outdoor unit control PCB.
E31Communications trouble within unitNo communication possible with MDC for 3 minutes or longer.Automatic recoveryCheck outdoor unit control PCB.
H01OvercurrentInverter stops after alarm is detected.Recovery at restart 1. Refrigerant cycle trouble, overload operation 2. Loose screws between HIC control PCB and radiating plate 3. Cooling failure of radiating plate 4. Check outdoor unit PCB wiring.

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Monday, October 25, 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 ->>

Sunday, October 24, 2010

Panasonic Error Code

3 komentar
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

2 komentar
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:

Wink time = 1
Failure = IPM protection

Wink time = 2
Failure = higher or lower voltage

Wink time = 3
Failure = Over current

Wink time = 4
Failure = Discharge temperature too high

Wink time = 5
Failure = Outdoor coil temperature too high

Wink time = 6
Failure = Drive abnormity

Wink time = 7
Failure = Communication abnormity with indoor unit

Wink time = 8
Failure = Compressor over heat (switch on top of compressor)

Wink time = 9
Failure = Outdoor air temperature sensor failure

Wink time = 10
Failure = Outdoor coil temperature sensor failure

Wink time = 11
Failure = Outdoor discharge pipe temperature sensor failure

Wink time = 12
Failure = Voltage sensor failure

Wink time = 13
Failure = Current sensor failure

Wink time = 14
Failure = IPM abnormity

Wink time = 15
Failure = Outdoor communication abnormity

Wink time = 16
Failure = DC fan motor no feedback

Wink time = 17
Failure = defrosting
Read More ->>

Saturday, October 23, 2010

Haier Fault Codes

0 komentar
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 ->>

Friday, October 22, 2010

LG Fault Code For SMS

0 komentar
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
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