ALARM CODES
31
18. ALARM CODES
If RUN lamp flashes 5 times (5 seconds) with unit number and
alarm code displayed, note the alarm code (see table below)
and ask your contractor for service.
Unit Number Alarm Code Model Code
If RUN lamp flashes for 2 seconds, there is a failure in
transmission between Indoor Unit and Remote Control
Switch. Possible causes are:
Remote Cable broken
Contact Failure in Remote Control Cable
IC or Microcomputer defective
In any case, ask your contractor for service
Refrigerant Cycle Number Number of connected Units
Code
No.
Category Content of Abnormality Leading Cause
01 Indoor Unit Tripping of Protection Device Failure of Fan Motor, Drain Discharge, PCB, Relay.
02 Outdoor Unit Tripping of Protection Device Activation of PSH
03 Transmission
Abnormality between Indoor (or Outdoor) and
Outdoor (or Indoor)
Incorrect Wiring. Failure of PCB. Tripping of Fuse. Power Supply
OFF
04 Failure in Transmission between PCBs
04.
Inverter Abnormality between Inverter and Control PCB
Fan controller transmission failure
05 Transmission Abnormality of Power Source Wiring Reverse Phase Incorrect Wiring.
06 Voltage Drop
Voltage Drop by Excessively Low or High Voltage
to Outdoor Unit
Voltage Drop of Power Supply. Incorrect Wiring or insufficient
Capacity of Power Supply Wiring.
07 Decrease in Discharge Gas Superheat Excessive Refrigerant Charge. Expansion Valve Open Lock.
08
Cycle
Increase in Discharge Gas Temperature
Insufficient Refrigerant. Ref. Leakage, Clogging or Expansion Valve
Close Lock
09 Outdoor Unit Tripping of Protection Device Failure of Fan Motor.
11 Inlet Air Thermistor
12 Outlet Air Thermistor
13 Freeze Protection Thermistor
14 Gas Piping Thermistor
Failure of Thermistor, Sensor, Connection.
19
Sensor on
Indoor Unit
Tripping of Protection Device for Fan Motor Failure of Fan Motor
21 High Pressure Sensor
22 Outdoor Air Thermistor
23 Discharge Gas Thermistor on Comp.
24 Evaporating Thermistor
29 Low Pressure Sensor
Failure of Thermistor, Sensor, Connection
30 Incorrect wiring connection
Incorrect wiring connection between outdoor unit, CH unit and
indoor unit
31 Incorrect Setting of Outdoor and Indoor Unit Incorrect Setting of Capacity Code.
32 Abnormal Transmission of Other Indoor Unit
Failure of Power Supply, PCB in other Indoor Unit. Failure of other
Indoor Unit of the same Refrigerant Cycle
35 Incorrect Setting in Indoor Unit No. Existence of the same Indoor Unit No. in the same Refrigerant Cycle
36 Incorrect Indoor unit Type Indoor Unit is not for R410A
38 Abnormality of Protective Circuit in Outdoor Unit
Failure of Indoor Unit PCB. Incorrect wiring. Connection to PCB in
Indoor Unit.
39
Sensor on
Outdoor Unit
Abnormality of Running Current at Constant
Compressor
Overcurrent, Blown Fuse of Failure of Current Sensor.
43 Pressure Ratio Decrease Protection Activating Failure of Compressor, Inverter
44 Low Pressure Increase Protection Activating
Overload to Indoor in Cooling. High Temperature of Outdoor Air In
Heating Expansion Valve Open Lock
45 High Pressure Increase Protection Activating
Overload Operation. Excessive Refrigerant. Clogging of Heat
Exchanger
46 High Pressure Decrease Protection Activating Insufficient Refrigerant.
47
Pressure
Low Pressure Decrease Protection Activating Insufficient refrigerant .
51 Abnormality of Current Sensor for Inverter Failure of Sensor on Inverter PCB
52 Overcurrent Protection Activating Overload, Overcurrent, Locking to Compressor.
53 IPM Protection Activating
Automatic Stoppage of IPM (Overcurrent, Low Voltage or
Overheating).
54
Inverter
Increase in Inverter Fin Temperature
Abnormal Inverter Fin Thermistor.
Abnormal Outdoor Fan
56 Abnormality of Detection for Fan Motor Position Abnormal detection Circuit of Transmission
57 Fan Controller Protection Activating Abnormal Fan Speed
58
Outdoor Fan
Abnormality of Fan Controller Overcurrent, Abnormal Fan Controller Fin
EE Inverter Compressor Protection
3 Time Occurrence of Alarm Giving Damage to Compressor within 6
hours
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