Hitachi Air Conditioning Error Codes
If a Safety Device is activated, cutting out the compressor, the Run light on the Remote Control switch blinks continuously and ABNML is indicated on the LCD display.
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 Inverter- Abnormality between Inverter and Control PCB- Failure in Transmission between PCBs
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 Cycle-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-Failure of Thermistor, Sensor, Connection
12 Outlet Air Thermistor-Failure of Thermistor, Sensor, Connection
13 Freeze Protection Thermistor-Failure of Thermistor, Sensor, Connection
14 Gas Piping Thermistor-Failure of Thermistor, Sensor, Connection
19 Tripping of Protection Device for Fan Motor -Failure of Fan Motor
21 High Pressure Sensor-Failure of Thermistor, Sensor, Connection
22 Outdoor Air Thermistor-Failure of Thermistor, Sensor, Connection
23 Discharge Gas Thermistor on Comp.-Failure of Thermistor, Sensor, Connection
24 Evaporating Thermistor-Failure of Thermistor, Sensor, Connection
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/Outdoor Unit No.- Existence of the same Indoor Unit No.
in the same refrigerant cycle.
38 Abnormality of Protective Circuit in Outdoor Unit- Failure of Indoor Unit PCB. Incorrect Wiring
Connection to PCB in Outdoor Unit
39 Abnormality of Running Current at Constant Compressor- Overcurrent, Melted 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 Low Pressure Decrease Protection Activating- Insufficient Refrigerant.
Expansion Valve Close Lock. Refrigerant Leakage.
51 Abnormality of Current Sensor for Inverter- Failure of Sensor on Inverter PCB
52 Overcurrent Protection Activating- Overload, Overcurrent, Locked to Compressor
53 IPM Protection Activating- Automatic Stoppage of IPM (Overcurrent, Low Voltage or Overheating)
54 ** 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 ** Abnormality of Fan Controller- Overcurrent, Abnormal Fan Controller Fin
59 AC Chopper AC Chopper Circuit Protection- Failure of FET, Power Supply, CT for Fan Motor
EE Compressor Compressor Protection- 3 Time Occurrence of Alarm Giving Damage to Compressor within 6 hours
dd *** Transmission Incorrect Wiring between Indoor Units- Incorrect Wiring between Indoor Units and Remote
* : For only FXG and FX3 series. Other code Nos. are common with FSG and FS3 series.
** : For only 24, 30FSG1/FSG5 (220V 60Hz), *** : In case of PC-2H2
Failure of Thermistor, Sensor, Connection