Haier 5U34HS1ERA Installation Manual - Page 17

Trouble shooting Malfunction Code 1 2 4 5 6 Diagnosis Possible reasons Faulty of outdoor unit EEPROM Communication failure between Module and ECU Faulty of outdoor unit EEPROM Communication cables broken or not well connected.IPM overcurrent or short circuit IPM on the module overcurrent,or short circuit Communication failure between Module and ECU Communication cables broken or not well connected. Communication cables broken,or not be well connected,or faulty main ECU,or faulty module Module operated overload Module worked overload Module low or high DC voltage (under 192V or above 375V) VDC 192V or VDC 375V 8 Discharging temperature overheating.Lack of refrigerant, Discharging temperature overheating.Lack of refrigerant,ambient ambient temperature too high or PMVs blocked. temperature too high or PMVs blocked. 9 Malfunction of the DC fan motor Fan is blocked,or the terminal is disconnected from the ECU 10 Malfunction of defrosting temp. sensor(Te) Sensor disconnected,or broken,or at wrong position or short circuit 11 Malfunction of compressor suction temp. sensor (Ts) Sensor disconnected,or broken,or at wrong position or short circuit 12 Malfunction of ambient temp. sensor(Ta) Sensor disconnected,or broken,or at wrong position or short circuit 13 Malfunction of compressor discharge temp. sensor (Td) Sensor disconnected,or broken,or at wrong position or short circuit 15 Communication failure between indoor&outdoor unit Wrong connection,or the wires be disconnected,or faulty ECU,or faulty power supply 17 4-way valve switching failure 18 Module overcurrent / Module switch failure Coil of 4-way valve is disconnected,or faulty outdoor ECU Module switch failure,or faulty module 20 Indoor overload 21 Indoor frosted Indoor overload Indoor frosted 23 Module temperature too high (Overload Protecter) Module temperature too high,or the temperature sensor broken(detected by the ECU) 24 Compressor overcurrent Over current of the compressor,or malfunction of the module 25 Input overcurrent Over current of the system,or malfunction with indoor or outdoor fan motors,or faulty ECU 26 MCU reset MCU on the ECU reset 27 Module current detect circuit malfunction Current detect circuit broken,or faulty module 28 Malfunction of liquid pipe temp. sensor for indoor unit A Sensor disconnected,or broken,or at wrong position or short circuit 29 Malfunction of liquid pipe temp. sensor for indoor unit B Sensor disconnected,or broken,or at wrong position or short circuit 30 Malfunction of liquid pipe temp. sensor for indoor unit C Sensor disconnected,or broken,or at wrong position or short circuit 31 Malfunction of liquid pipe temp. sensor for indoor unit D Sensor disconnected,or broken,or at wrong position or short circuit 32 Malfunction of gas pipe temp. sensor for indoor unit A Sensor disconnected,or broken,or at wrong position or short circuit 33 Malfunction of gas pipe temp. sensor for indoor unit B Sensor disconnected,or broken,or at wrong position or short circuit 34 Malfunction of gas pipe temp. sensor for indoor unit C Sensor disconnected,or broken,or at wrong position or short circuit 35 Malfunction of gas pipe temp. sensor for indoor unit D Sensor disconnected,or broken,or at wrong position or short circuit 36 Malfunction of gas pipe temp. sensor for indoor unit E Sensor disconnected,or broken,or at wrong position or short circuit 39 Malfunction of condensing temp. sensor(TC) Sensor disconnected,or broken,or at wrong position or short circuit 40 Malfunction of liquid pipe temp. sensor for indoor unit E Sensor disconnected,or broken,or at wrong position or short circuit 41 Malfunction of piping temp. sensor(TOCI) Sensor disconnected,or broken,or at wrong position or short circuit 42 System high pressure switch off High pressure switch is disconnected,or high pressure switch is broken,or high pressure switch worked 43 System low pressure switch off Low pressure switch is disconnected,or low pressure switch is broken,or low pressure switch worked 44 System high pressure protection.Refrigerant overabundance,High condensing temp. or malfunction of fan motor. Tc too high and faulty outdoor fan motors when cooling,or faulty indoor fan motor when heating,or refrigerant overabundance. 45 System low pressure protection.Refrigerant shortage,Low Te too low and faulty outdoor fan motors when heating,or faulty indoor defrosting temp., or malfunction of fan motor. fan motor when cooling,or refrigerant shortage. 46 Malfunction of module temp.sensor Sensor disconnected,or broken,or at wrong position or short circuit 15