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Japanese-made Hitachi air conditioners, with over 100 years of experience, are highly favored by consumers for their excellent quality and affordable prices. Despite being equipped with modern technology and smart features, Hitachi air conditioners may still encounter occasional issues during usage.
Error codes with letters and numbers for Hitachi air conditioners
The error code table for letters and numbers of Hitachi air conditioners includes the following:
+ Error code EE: Compressor protection. The alert duration can cause damage to the compressor within 6 hours.
+ Error code DD: Incorrect wiring among indoor devices. Incorrect wiring among indoor devices and remote control switch.
+ Error code E0: Abnormal operation of the water pump.
+ Error code E1: High-pressure protection of the compressor.
+ Error code E2: Anti-freezing protection within the indoor unit.
+ Error code E3: Low-pressure protection of the compressor.
+ Error code E4: Air release protection for high temperature of the compressor.
+ Error code E5: Overload protection of the compressor or inverter error.
+ Error code E6: Communication failure.
+ Error code E8: Indoor fan protection.
+ Error code E9: Water flow protection.
+ Error code P01: Pressure ratio control protection.
+ Error code P02: High-pressure increase protection.
+ Error code P03: Inverter current protection.
+ Error code P04: High temperature increase protection of the inverter fins.
+ Error code P05: High temperature protection of the discharge air at the top of the compressor.
+ Error code P06: Low-pressure decrease protection.
+ Error code P09: High-pressure decrease protection.
+ Error code P0A: Current control protection demand.
+ Error code P0D: Low-pressure increase protection.
+ Error code P11: Retry pressure ratio reduction.
+ Error code P12: Retry low-pressure increase.
+ Error code P13: Retry high-pressure increase.
+ Error code P14: Retry overcurrent at constant compressor speed.
+ Error code P15: Air release temperature increase/pressure decrease retry.
+ Error code P16: Supercooling gas release retry.
+ Error code P17: Abnormal inverter retry.
+ Error code P18: Abnormal inverter voltage retry / Inverter error retry.
+ Error code P26: High-pressure decrease retry.
+ Error code H1: Fault in the indoor unit.
+ Error code H2: Indoor ambient temperature.
+ Error code H3: Indoor coil temperature.
+ Error code H4: Set temperature in the indoor unit.
+ Error code FE: Communication between the main control panel and remote control wiring error.
+ Error code ER: Communication between the main control panel and error display panel.
+ Error code F0: Environmental sensor malfunction in the indoor air return vent.
+ Error code F1: Malfunction of the device evaporator sensor.
+ Error code F2: Condensation sensor malfunction.
+ Error code F3: Abnormal outdoor environmental sensor.
+ Error code F4: Malfunction of the discharge air sensor.
+ Error code F5: Malfunction of the environmental sensor on the display.
+ Error code H0: Auxiliary electric heating malfunction.
Flashing light error code table for Hitachi air conditioners
Flashing light error code table for Hitachi air conditioners includes the following:
+ 1 Flash: Insufficient heating or cooling system; refrigerant may be low.
+ 2 Flashes: Outdoor unit is operating under duress (not dissipating heat).
+ 3 Flashes: Indoor communication error. To troubleshoot, check the connecting cables.
+ 4 Flashes: Fault in the outdoor unit. To resolve, check the functionality of the outdoor unit.
+ 5 Flashes: Fault in the indoor fan motor or power relay. Check the indoor fan or power relay.
+ 6 Flashes: High water level alarm. Check the pipes and the pump.
+ 7 Flashes: Drain pump is in operation (not an error).
+ 8 Flashes: Louver malfunction. Inspect the air flap and the wiring system.
+ 9 Flashes: Indoor thermal resistor malfunction. Check the thermal resistor, air, and pipes.
+ 10 Flashes: Fan rotation error. Examine the indoor fan motor to resolve this issue.
+ 11 Flashes: High-voltage generator; ionization error. Inspect the high-voltage generator/ionizer, fix if damaged.
+ 12 Flashes: Communication error indoors/outdoors. To troubleshoot, check the connecting cables.
+ 13 Flashes: EFPROM error on the PCB. Conduct a PCB inspection.
2-Digit error code table for Hitachi air conditioners
2-Digit error code table for Hitachi air conditioners includes the following:
+ Error code 01: Sliding protection devices, faulty fan motor, drain pipe, PCB, relay.
+ Error code 02: Unlocking protection devices; activates PSH.
+ Error code 03: Abnormal connection between indoor and outdoor units; incorrect wiring. PCB malfunction, Tripping of fuse, power supply issues.
+ Error code 04: Abnormality between inverter and control PCB; damage during transmission between PCBs.
+ Error code 05: Unusual power supply; reverse-phase wiring; incorrect wiring.
+ Error code 06: Voltage drop due to too low or too high voltage for the outdoor unit; power supply voltage drop; wiring or power supply wire not loaded enough.
+ Error code 07: Excessive superheat reduction; refrigerant overcharge; expansion valve lock.
+ Error code 08: Increase in exhaust air temperature; insufficient refrigerant; reference leakage; blockage or expansion valve lock.
+ Error code 09: Sliding of protective devices; fan motor malfunction.
+ Error code 11: Input thermistor; damage to thermistor, sensor, connection.
+ Error code 12: Output thermistor; damage to thermistor, sensor, connection.
+ Error code 13: Frost protection Thermistor; damage to Thermistor, sensor, connection.
+ Error code 14: Air pipe thermistor; damage to thermistor, sensor, connection.
+ Error code 19: Fan motor malfunction.
+ Error code 21: High-pressure sensor; damage to thermistor, sensor, connection.
+ Error code 22: Outdoor air thermistor; damage to thermistor, sensor, connection.
+ Error code 23: Faulty exhaust thermistor; damage to Thermistor, sensor, connection.
+ Error code 24: Evaporator thermistor; damage to thermistor, sensor, connection.
+ Error code 29: Low-pressure sensor; damage to thermistor, sensor, connection.
+ Error code 30: Incorrect wiring connection between outdoor and indoor units.
+ Error code 31: Incorrect setting of outdoor and indoor units; incorrect power code setting.
+ Error code 32: Abnormal transmission from another indoor unit; power supply failure; PCB in another indoor unit malfunction; malfunction of another indoor unit in the same refrigeration cycle.
+ Error code 35: Incorrect settings in the indoor/outdoor units; no matching number of indoor units in the same refrigeration cycle.
+ Error code 38: Abnormal protection circuit in the outdoor unit; malfunction of the indoor unit PCB. Incorrect wiring connection to the PCB in the outdoor unit.
+ Error code 39: Continuous running current abnormality at the compressor; overcurrent, damaged current sensor bridge.
+ Error code 43: Pressure ratio reduction protection activated; compressor malfunction; inverter malfunction.
+ Error code 44: Low pressure protection activated; indoor cooling part overloaded, high outdoor air temperature in the heating system, expansion valve open.
+ Error code 45: High pressure protection activated; excessive operation load; refrigerant overcharge causing heat exchanger blockage.
+ Error code 46: High pressure reduction protection activated; insufficient refrigerant; recharge refrigerant gas fully.
+ Error code 47: Low pressure reduction protection activated; insufficient refrigerant; expansion valve closed; refrigerant leakage.
+ Error code 51: Abnormality of the current sensor for the inverter; sensor error on the inverter PCB.
+ Error code 52: Overcurrent protection activated; overload; excessive current; locked with the compressor.
+ Error code 53: IPM protection activated; automatic IPM stop.
+ Error code 54: Increase in inverter fin temperature; abnormal inverter fin thermistor. Outdoor fan is abnormal.
+ Error code 56: Abnormal detection of fan motor position; abnormal detection circuit.
+ Error code 57: Fan control unit protection activated; abnormal fan speed.
+ Error code 58: Abnormality of fan control unit; overcurrent.
+ Error code 59: AC Chopper circuit protection; damaged FET; power supply; CT for fan motor.
Above is the comprehensive and detailed update of the 2023 Hitachi air conditioner error code table, hoping it helps you identify the exact cause and find a quick solution.
