Air energy heat pump common faults and maintenance methods
The water pump does not start
Judge whether the pump shaft is stuck. If the water pump becomes hot or it is difficult to turn the fan blades with a screwdriver, it can be proved that the shaft of the water pump is stuck. The solution is to use a flat-blade screwdriver to turn the fan of the water pump. The shaft of the water pump needs to be replaced or repaired.
2.The main engine does not run
First, make sure that the unit parameters are set correctly, and then check whether the power supply is faulty; check whether there is a problem with the compressor contactor and whether the wiring is tight. In addition, if the compressor runs at high load for a long time, overheating protection will also occur.
3. The fan does not turn
The fan motor is burned out, replace or repair; the contactor is broken, replace the contactor; the fan capacitor is damaged, replace the capacitor; there is no start signal, and the motherboard fan has no start signal
4.The water temperature is too low
Check whether the water outlet temperature is consistent with the actual temperature. If not, replace the water outlet temperature probe. If it is consistent with the actual temperature, check whether the water tank temperature value is consistent with the actual value (if the water tank temperature controller works), check and clean the pipeline to check whether the pipeline valve is damaged, whether it is opened, check whether the circulating pump meets the unit flow requirements, and whether the operation is normal
5.Low heating capacity
Air heat exchanger poor heat dissipation, clean air heat exchanger: insufficient water flow, cleaning filter: insufficient refrigerant injection, check whether there is leakage, and inject a certain amount of working fluid; Fan motor is bad, evaporator frost serious; If the heat insulation of the pipeline is not good, heat the pipeline again. Check whether the refrigerant system of the unit is blocked. If the compressor is faulty, replace the compressor.
6.Water overheating protection
Whether the actual temperature of the tank exceeds the set temperature; The position of the tank sensor is incorrect or the tank sensor is not in close contact with the dead pipe wall. The water tank temperature sensor is disconnected or the resistance value of the temperature sensor drifts. Check set temperature and temperature probe. Check whether the water temperature is consistent with the actual value. If the temperature is consistent, the probe is broken and the probe can be replaced. If there is no problem with these, you need to see the motherboard.
7. The temperature sensor is faulty
First check whether the connector of the probe on the motherboard side is firm and whether the motherboard has a problem. If there is no problem, the corresponding temperature sensor is short-circuited or open. Check the resistance of the corresponding sensor probe. When the temperature is 25, the normal resistance of this sensor is about 5k(exhaust temperature sensor is 80,50 k). If the resistance value is normal, reinsert and confirm that the circuit board is faulty.
8. The water level switch is faulty
The common reason is that the high and low water levels are reversed; Low water level device wiring contact is poor; The mainboard is faulty.