Hitachi Fault Codes all types very useful information
01 – Indoor Unit Protection Device Tripping (Flow Switch)
02 – Outdoor Unit Protection Device Trip (High Pressure Cutoff)
03 – Abnormality Between Indoor and Outdoor Units
04 – Abnormality Between Inverter PCB And Outdoor Unit PCB
04. – Abnormality Between Fan Control And Outdoor Unit PCB
05 – Abnormal Power Supply Phases
06 – Abnormal Inverter Voltage
06. – Abnormal Fan Control Voltage
07 – Decrease at Output Gas Temperature
08 – Output Gas Temperature Increase
0A – Abnormalities Between Outdoor Unitsk
0b – Incorrect Outdoor Unit Address Setting
0C – Incorrect Master Outdoor Unit Setting
11 – Air Inlet Thermistor
12 – Air Outlet Thermistor
13 – Frost Protection Thermistor
14 – Gas Piping Thermistor
19 – Indoor Unit Fan Protection Device Trip
21 – High Pressure Sensor
22 – Outdoor Thermistor
23 – Compressor Outlet Gas Thermistor
24 – Heat Exchanger Liquid Pipe Thermistor
25 – Heat Exchanger Gas Pipe Thermistor
29 – Low Pressure Sensor
31 – Incorrect Capacity Setting of Outdoor Unit or Indoor Unit
35 – Incorrect Setting of Indoor Unit Number
36 – Indoor Unit Combination Error
38 – Abnormality in the Receiving Circuit for Protection in the Outdoor Unit
39 – Abnormal Current Circulating in Constant Speed Compressor
3A – Abnormalities in Outdoor Unit Capacity
3b – Incorrect Adjustment of Outdoor Unit Model, Combination or Voltage
3d – Abnormality of Communication Between Master and Slave Unitsi
43 – Trip of Low Compression Ratio Protection Device
44 – Tripping of Low Pressure Surge Protection Device
45 – Opening the High Pressure Surge Protection Device
47 – Trip of Low Pressure Fall Protection Device (Vacuum Operation Protection)
51 – Abnormal Inverter Current Sensor
53 – Inverter Fault Signal Detector
54 – Inverter Blade Temperature Abnormality
55 – Inverter Failure
57 – Fan Control Protection Trip
5A – Fan Control Blade Temperature Abnormality
5b – Overcurrent Protection Tripping
5C – Abnormality in Fan Control Sensor
EE – Compressor Protection Alarm
b1 – Outdoor Unit No. Setting Incorrect Unit Setting and Cooling Cycle No.
b5 – Indoor Unit No. Setting Incorrect Indoor Unit Connection Number Setting
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