Models: ACMI-H12/4, ACMI-H16/5, ACMI-H28/5, ACMI-H42/5
| The fault | The fault code definition | Possible cause | solution | |||
| code | ||||||
| 1. The connection plug loose | 1. Reconnect firmly | |||||
| Eon | ： | 00 | Communication the fault | 2. The communication wire is an open or short circuit | 2. Replace a normal one | |
| 3. Main control board malfunction | 3. Replace a new one | |||||
| 1 、 The water flow switch and the power supply wires are not well | 1. reconnect the wires firmly | |||||
| connected | ||||||
| Eon | ： | 01 | The water flow switch protection | 2. The water flow switch malfunction | 2. Replace a normal water flow switch | |
| 3. Circulating the water pump malfunction | 3. Repair or replace the circulating water pump | |||||
| 4. The water filter clogging | 4. Clean or replace the water filter | |||||
| 5. The evaporator tubes have a dirty plugging phenomenon | 5. Clean the evaporator tubes | |||||
| Eo：02 | The outdoor fan motor overload | 1. The outdoor unit ventilation is insufficient | 1. Improve or enhance the ventilation | |||
| 2. The fan motor stuck | 2. Replace the fan motor | |||||
| Eo：03 | 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 | ||||
| 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 | ||||
| Eo：04 | 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 | ||||||
| Eo：06 | Freezing point protection switch | The freezing point protection switch is off | Press the reset key to reset | |||
| 1. The temperature sensor broken | 1. Replace the temperature sensor | |||||
| Eo：07 | Anti-hyperthermal protection | 2. Circulating the water pump malfunction | 2. Repair or replace the circulating water pump | |||
| in heating mode | 3. The water filter clogging | 3. Clean or replace the water filter | ||||
| 4. The evaporator tubes have a dirty plugging phenomenon | 4. Clean the evaporator tubes | |||||
| High discharge temperature protection of | 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | ||||
| Er：03 | 2. The outdoor fan blade is broken | 2. Replace the fan blade | ||||
| subsystem 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 discharge temperature | 5. Reconnect the wire plug to the main control board | |||||
| sensor and main control board lose | ||||||
| High discharge temperature protection of | 6. The outdoor exchanger is dirty or sticky | 6. Clean the heat exchanger | ||||
| Er：13 | 7. Discharge temperature sensor deviation | 7. Replace the sensor | ||||
| subsystem 2# | 8. Refrigerant leak | 8. Find out the leak point, repair the welding, refill | ||||
| the unit after vacuuming it | ||||||
| 9. The indoor capillary or the filter is blocked | 9. Replace the capillary or filter | |||||
| 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 outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | |||||
| 2. The outdoor fan blade is broken | 2. Replace the fan blade | |||||
| High-pressure protection of subsystem 1# | 3. The connection between the fan blade and the outdoor fan | 3. Tighten or replace the sleeve | ||||
| ： | motor lose | |||||
| Er 04 | ||||||
| 4. The outdoor fan stops working | 4. Eliminate the malfunction cause | |||||
| 5. The connection between the high-pressure switch and | 5. Reconnect the wire plug to the main control board | |||||
| main control board lose | ||||||
| 6. High-pressure switch malfunction | 6. Replace the high-pressure switch | |||||
| Er：14 | High-pressure protection of subsystem 2# | 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 | |||||
| Er：05 | low suction pressure protection of | 2. The water filter clogging | 2. Clean the water filter | |||
| Subsystem 1# | 3. The evaporator tubes have a dirty plugging phenomenon | 3. Clean the evaporator tubes | ||||
| 4. The connection between the low-pressure switch and the main | 4. Reconnect the wire to the main control board | |||||
| control board lose | ||||||
| low suction pressure protection of | 5. Low-pressure switch malfunction | 5. Replace the low-pressure switch | ||||
| Er：15 | 6. Refrigerant leak | 6. Find out the leak point, repair the welding, refill | ||||
| Subsystem 2# | the unit after vacuuming it | |||||
| 7. The capillary or the filter is blocked | 7. Replace the capillary or filter | |||||
| 1. The temperature sensor broken | 1. Replace the sensor | |||||
| ： | 01 | Return the water temperature to the fault | 2. Sensor plug insert again to PCB | 2. Reconnect the sensor firmly | ||
| Po | 3. Main control board malfunction | 3. Replace the main control board | ||||
| The outdoor ambient temperature sensor | 1. The temperature sensor broken | 1. Replace the sensor | ||||
| ： | 02 | 2. Sensor plug insert again to PCB | 2. Reconnect the sensor firmly | |||
| Po | the fault | 3. Main control board malfunction | 3. Replace the main control board | |||
| 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 | |||||
| 3. Clean the water filter | |||||
| ： | 03 | Anti-freezing protection in cooling mode | 3. The water filter clogging | ||
| Po | 4. The evaporator tubes have a dirty plugging phenomenon | 4. Clean the evaporator tubes | |||
| 5. Refrigerant leak | 5. Find out the leak point, repair the welding, refill | ||||
| the unit after vacuuming it | |||||
| 1. The temperature sensor broken | 1. Replace the sensor | ||||
| ： | 06 | The water outlet temperature is the fault | 2. Sensor plug insert again to PCB | 2. Reconnect the sensor firmly | |
| Po | 3. Main control board malfunction | 3. Replace the main control board | |||
| ： | 07 | Circulating the water anti-freezing protection in | The outdoor ambient temperature is too low | Start the heating mode | |
| Po | winter | ||||
| Pr：02 | Exchanger coil temperature sensor the fault of | 1. Sensor is an open or short circuit | 1. Replace the sensor | ||
| subsystem 1# | 2. Sensor separated from the copper tube | 2. Refix the sensor correctly | |||
| Pr：12 | Exchanger coil temperature sensor the fault of | 3. Sensor plug insert again | 3. Reinsert firmly | ||
| subsystem 2# | 4. Main control board malfunction | 4. Replace the main control board | |||
| Pr：03 | Discharge temperature sensor the fault of | 1. Sensor is an open or short circuit | 1. Replace the sensor | ||
| subsystem 1# | 2. The sensor separates from the copper tube | 2. Refix the sensor correctly | |||
| Pr：13 | Discharge temperature sensor the fault of | 3. Sensor plug insert again | 3. Reinsert firmly | ||
| 4. Main control board malfunction | 4. Replace the main control board | ||||
| subsystem 2# | |||||
| 1. The outdoor ventilation is insufficient | 1. Improve or enhance the ventilation | ||||
| Pr：04 | Cooling overload protection of subsystem | 2. The outdoor fan blade is broken | 2. Replace the fan blade | ||
| 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. Exchanger coil bottom temperature sensor malfunction | 5. Replace the sensor | ||||
| Pr：14 | Cooling overload protection of subsystem | 6. The outdoor exchanger is dirty or sticky | 6. Clean the heat exchanger | ||
| 2# | 7. There are some airs in the refrigerant line | 7. Refill the freon unit after vacuuming it | |||
| 8. The capillary or the filter is blocked | 8. Replace the capillary or filter | ||||