Models: ACMX-H65/5, ACMX-H95/5, ACMX-H130/5, ACMX-H65/5R1
| the fault code | the fault code definition | possible cause | Solution | |
| 1 、 The water flow switch and the power supply wires are not well | 1. reconnect the wires firmly | |||
| connected | 2. Replace a normal water flow switch | |||
| E01 | 2. The water flow switch malfunction | |||
| The water flow switch protection | 3. Repair or replace the circulating water pump | |||
| 3. Circulating the water pump malfunction | ||||
| 4. Clean or replace the water filter | ||||
| 4. The water filter clogging | ||||
| 5. Clean the evaporator tubes | ||||
| 5. The evaporator tubes have a dirty plugging phenomenon | ||||
| E03 | The outdoor fan NO1. &NO3. overload | 1. The outdoor unit ventilation is insufficient | 1. Improve or enhance the ventilation | |
| protection | ||||
| E04 | The outdoor fan NO2. overload protection | 2. The fan motor stuck | 2. Replace the fan motor | |
| E05 | Input the power supply phase sequence | 1. Phase loss | 1. reconnect the wires firmly | |
| protection | 2. Phase dislocation | 2. change the two-phase sequence of the power supply | ||
| E07 | Return the water temperature to the fault | 1. The temperature sensor broken | 1. Replace the sensor | |
| 2. Sensor plug insert again to PCB | 2. Reconnect the sensor firmly | |||
| 3. Main control board malfunction | 3. Replace the main control board | |||
| E08 | The water outlet temperature is the fault | 1. The temperature sensor broken | 1. Replace the sensor | |
| 2. Sensor plug insert again to PCB | 2. Reconnect the sensor firmly | |||
| 3. Main control board malfunction | 3. Replace the main control board | |||
| 1. The temperature sensor broken | 1. Replace the temperature sensor | |||
| 2. Repair or replace the circulating water pump | ||||
| E12 | Anti-hyperthermal protection | 2. Circulating the water pump malfunction | ||
| 3. Clean or replace the water filter | ||||
| in heating mode | 3. The water filter clogging | |||
| 4. Clean the evaporator tubes | ||||
| 4. The evaporator tubes have a dirty plugging phenomenon | ||||
| 1 The return of the water temperature or the water inlet sensor | 1. Replace the temperature sensor | |||
| The water flow shortage protection | broken | 2. Clean or replace the water filter | ||
| E13 | 2. The water filter clogging | 3. Repair or replace the circulating water pump | ||
| (Chilled the water big temperature difference) | ||||
| 3. Circulating the water pump malfunction | 4. Clean the evaporator tubes | |||
| 4. The evaporator tubes have a dirty plugging phenomenon | ||||
| 1. The connection plug loose | 1. Reconnect firmly | |||
| E15 | Communication the fault between wired | 2. Wired controller malfunction | 2. Replace a new one | |
| controller and PCB | 3. The communication wire is an open or short circuit | 3. Replace a normal one | ||
| 4. Main control board malfunction | 4. Replace a new one | |||
| E16 | Circulating the water anti-freezing protection | 1. The outdoor ambient temperature is too low | 1. Start the heating mode | |
| in winter | 2. The outdoor ambient temperature sensor malfunction | 2. Replace The outdoor ambient temperature sensor | ||
| 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | |||
| E26 | High discharge temperature protection of | 2. The outdoor fan blade is broken | 2. Replace the fan blade | |
| the compressor 1# | 3. The connection between the fan blade and the outdoor fan | 3. Tighten or replace the sleeve | ||
| motor lose | ||||
| 4. The outdoor fan stops working | 4. Eliminate the malfunction cause | |||
| 5. The connection between the discharge temperature sensor | 5. Reconnect the wire plug to the main control board | |||
| E27 | High discharge temperature protection of | and the main control board lose | ||
| the compressor 2# | 6. The outdoor exchanger is dirty or sticky | 6. Clean the heat exchanger | ||
| 7. Discharge temperature sensor deviation | 7. Replace the sensor | |||
| 8. Refrigerant leak | 8. Find out the leak point, repair the welding, refill | |||
| High discharge temperature protection of | unit after vacuuming it | |||
| E28 | 9. The indoor capillary or the filter is blocked | 9. Replace the capillary or filter | ||
| the compressor 3# | 10. There are some airs in the refrigerant line | 10. Find out the leak point, repair the welding, refill | ||
| the unit after vacuuming it | ||||
| 1. The connection plug loose | 1. Reconnect firmly | |||
| E30 | Communication the fault between different | 2. The communication wire between modules is short | 2. Replace a new one | |
| circuit or open circuit | ||||
| modules | ||||
| 3. The communication wire is an open or short circuit | 3. Replace a normal one | |||
| 4. Main control board malfunction | 4. Replace a new one | |||
| 1. The water outlet temperature sensor malfunction | 1. Replace a normal one | |||
| 2. Repair it or change a normal one | ||||
| 2. Circulating the water pump malfunction | ||||
| E33 | 3. Clean the water filter | |||
| Anti-freezing protection in cooling mode | 3. The water filter clogging | |||
| 4. Clean the evaporator tubes | ||||
| 4. The evaporator tubes have a dirty plugging phenomenon | ||||
| 5. Refrigerant leak | 5. Find out the leak point, repair the welding, refill the freon | |||
| unit after vacuuming it | ||||
| E34 | Over-current protection of the compressor 1# | 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | |
| 2. Tighten or replace the sleeve | ||||
| 2. The connection between the fan blade and the outdoor fan | ||||
| motor lose | 3. Eliminate the malfunction cause | |||
| 3. The outdoor fan stops working | ||||
| E35 | Over-current protection of the compressor 2# | 4. Replace the fan blade | ||
| 4. The outdoor fan blade is broken | ||||
| 5. The outdoor exchanger is dirty or sticky | 5. Clean the heat exchanger | |||
| 6. Replace the capillary or filter | ||||
| 6. Pipeline ice blocking or dirty | ||||
| E36 | Over-current protection of the compressor 3# | 7. Release some refrigerant | ||
| 7. Refrigerant overcharged | ||||
| 1. 4-way valve coil open or short circuit | 1. Replace valve coil | |||
| 2. Valve block cannot get the designated position or Valve | 2. Replace valve body | |||
| E38 | The four-way valve malfunction | blow-by | ||
| 3. The outdoor ambient temperature sensor malfunction or | 3. Replace a normal one | |||
| exchanger coil temperature sensor | ||||
| 4. The main PCB failure | 4. Replace the main PCB board |
| 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | |||||
| 2. The outdoor fan blade is broken | 2. Replace the fan blade | |||||
| 3. The connection between the fan blade and the outdoor fan | 3. Tighten or replace the sleeve | |||||
| motor lose | ||||||
| E39 | 4. The outdoor fan stops working | 4. Eliminate the malfunction cause | ||||
| High-pressure protection | 5. The connection between the high-pressure switch and the main | 5. Reconnect the wire plug to the main control board | ||||
| control board lose | ||||||
| 6. High-pressure switch malfunction | 6. Replace the high-pressure switch | |||||
| 7. The outdoor exchanger is dirty or sticky | 7. Clean the heat exchanger | |||||
| 8. There are some airs in the refrigerant line | 8. Refill the freon unit after vacuuming it | |||||
| 9. The capillary or the filter is blocked | 9. Replace the capillary or filter | |||||
| 1. Circulating the water pump malfunction | 1. Repair it or change a normal one | |||||
| 2. The water filter clogging | 2. Clean the water filter | |||||
| 3. The evaporator tubes have a dirty plugging phenomenon | 3. Clean the evaporator tubes | |||||
| E40 | Low-pressure protection | 4. The connection between the low-pressure switch and the main | 4. Reconnect the wire to the main control board | |||
| control board lose | ||||||
| 5. Low-pressure switch malfunction | 5. Replace the low-pressure switch | |||||
| 6. Refrigerant leak | 6. Find out the leak point, repair the welding, refill the freon | |||||
| unit after vacuuming it | ||||||
| 7. The capillary or the filter is blocked | 7. Replace the capillary or filter | |||||
| 1. Sensor is an open or short circuit | 1. Replace the sensor | |||||
| E41 | Exchanger coil bottom temperature | 2. The sensor separates from the copper tube | 2. Refix the sensor correctly | |||
| sensor the fault | 3. Sensor plug insert again | 3. Reinsert firmly | ||||
| 4. Main control board malfunction | 4. Replace the main control board | |||||
| E42 | Discharge temperature sensor the fault of | 1. Sensor is an open or short circuit | 1. Replace the sensor | |||
| the compressor 1# | ||||||
| 2. The sensor separates from the copper tube | 2. Refix the sensor correctly | |||||
| E43 | Discharge temperature sensor the fault of | |||||
| the compressor 2# | 3. Sensor plug insert again | 3. Reinsert firmly | ||||
| E44 | Discharge temperature sensor the fault of | 4. Main control board malfunction | 4. Replace the main control board | |||
| the compressor 3# | ||||||
| 1. Sensor is an open or short circuit | 1. Replace the sensor | |||||
| E50 | Suction temperature sensor the fault | 2. The sensor separates from the copper tube | 2. Refix the sensor correctly | |||
| 3. Sensor plug insert again | 3. Reinsert firmly | |||||
| 4. Main control board malfunction | 4. Replace the main control board | |||||
| 1. Sensor is an open or short circuit | 1. Replace the sensor | |||||
| E51 | Evaporator temperature sensor the fault | 2. The sensor separates from the copper tube | 2. Refix the sensor correctly | |||
| 3. Sensor plug insert again | 3. Reinsert firmly | |||||
| 4. Main control board malfunction | 4. Replace the main control board | |||||
| E52 | 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | ||||
| Cooling overload protection | 2. Replace the fan blade | |||||
| 2. The outdoor fan blade is broken | ||||||
| 3. Tighten or replace the sleeve | ||||||
| 3. The connection between the fan blade and the outdoor fan | 4. Eliminate the malfunction cause | |||
| motor lose | ||||
| 4. The outdoor fan stops working | 5. Replace the sensor | |||
| 5. Exchanger coil bottom temperature sensor malfunction | 6. Clean the heat exchanger | |||
| 6. The outdoor exchanger is dirty or sticky | 7. Refill the freon unit after vacuuming it | |||
| 7. There are some airs in the refrigerant line | 8. Replace the capillary or filter | |||
| 8. The capillary or the filter is blocked | ||||
| E53 | Module type dip switch setting incorrect | Module type dip switch setting incorrect | Reset Module type dip switch setting with reference | |
| to the wiring diagram | ||||
| E54 | Module address repeat | Module address dip switch setting incorrect | Reset address setting dip switch concerning | |
| wiring diagram as needed | ||||