Table of Contents
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Code
Category
No.
Indoor Unit
01
Outdoor Unit
02
Transmission
03
Inverter
04
04
*
G
Transmission
05
Voltage Drop
06
07
Cycle
08
09
Outdoor Unit
11
12
Sensor on
13
Indoor Unit
14
19
21
22
Sensor on
23
Outdoor Unit
24
29
31
32
35
System
38
39
43
44
Pressure
45
47
51
52
Inverter
53
54
56
Outdoor Fan
57
58
Transmission
dd**
EE
Compressor
*
The indication flashes.
** In case of PC-P1H.
30
Table 7.3 Alarm Code
Content of Abnormality
Tripping of Protection Device
Tripping of Protection Device
Abnormality between Indoor and
Outdoor (or Indoor)
Inverter Trip of Outdoor Unit
Abnormality of Fan Controller
Abnormality of Power Source Wiring
Voltage Drop in Outdoor Unit Excessively
Low or High Voltage to Outdoor Unit
Decrease in Discharge Gas Superheat
Increase in Discharge Gas Temperature
Tripping of Protection Device
Inlet Air Thermistor
Outlet Air Thermistor
Freeze Protection Thermistor
Gas Piping Thermistor
Tripping of Protection Device
High Pressure Sensor
Outdoor Air Thermistor
Discharge Gas Thermistor
Evaporating Thermistor
Low Pressure Sensor
Incorrect Setting of Outdoor and Indoor Unit
Abnormal Transmission of Other Indoor Unit
Incorrect Setting in Indoor Unit No.
Abnormality of Protective Circuit in
Outdoor Unit
Abnormality of Running Current at
Constant Compressor
Pressure Ratio Decrease Protection
Activating
Low Pressure Increase Protection
Activating
High Pressure Increase Protection
Activating
Low Pressure Decrease Protection
Activating
Abnormality of Current Sensor for Inverter
Thermal Protection Activating
Overcurrent Protection Activating
IPM Protection Activating
Increase in Inverter Fin Temperature
Abnormality of Detection for
Fan Motor Position
Fan Controller Protection Activating
Abnormality of Fan Controller
Incorrect Wiring between Indoor Units
Compressor Protection
Leading Cause
Failure of Fan Motor, Drain Discharge,
PCB, Relay.
Failure of Compressor, Refrigerant
Quantity, Inverse Phase.
Incorrect Wiring. Failure of PCB.
Tripping of Fuse.
Failure in Transmission of PCB for
Inverter.
Failure in Transmission between
Fan Controller and Inverter.
Reverse Phase Incorrect Wiring.
Voltage Drop. Incorrect Wiring.
Tripping of Fuse.
Excessive Refrigerant Charge.
Failure of Thermistor, Wiring.
Insufficient Refrigerant.
Failure of Thermistor, Wiring.
Failure of Fan Motor, Incorrect Wiring.
Failure of Thermistor, Sensor,
Connection.
Failure of Fan Motor, Incorrect Wiring.
Failure of Thermistor, Sensor,
Connection.
Incorrect Setting of Capacity Code.
Failure of Power Supply, PCB in
Other Indoor Unit.
Existence of the same Indoor Unit No.
Incorrect Connection to PCB in
Outdoor Unit.
Incorrect Wiring.
Failure of Compressor, Inverter,
Power Supply.
Overload to Indoor in Cooling.
High Temperature or Outdoor Air.
Overload Operation.
Excessive Refrigerant.
Vacuum Condition in Cycle Failure of
Expansion Valve. Insufficient Refrigerant.
Failure of Current Sensor.
Overload, Overcurrent, Locking to
Compressor.
Overcurrent, Low Voltage,
Overheating of Inverter Parts.
Abnormal Inverter Fin Thermistor,
Abnormal Outdoor Fan.
Abnormal Detection Circuit of
Transmission.
Overcurrent, Abnormal Fan
Controller Fin.
Abnormal Fan Speed.
Incorrect Wiring between Indoor Units and
Remote Control Switch.
Failure of Compressor.
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