Heat pump maintenance , in addition to the early installation and commissioning, also requires regular maintenance, just like our car, regular cleaning and maintenance can extend the service life of the vehicle while saving energy and fuel consumption. The same is true for air source heat pumps, which require careful care to ensure better performance and longer service life. How do we maintain the air source heat pump in daily life?

1. Daily inspection

1. Check whether the buttons of the wire controller are sensitive and whether there is a display failure

2. Before starting up, check the temperature parameters, switch status and load output:
A. The temperature display is not much different from the ambient temperature.
B. It is normal for the high-voltage and low-voltage switches to be normally closed, and the water flow switch is normally open to be normal.
C. The load display is off
3 .Check whether the voltage is normal before starting up

4. After starting up, check whether the water pressure is normal, listen to whether there are abnormal noises when starting each load, and check whether the current is consistent with the nameplate after the operation is stable

5. Check whether the parameters are within the normal range after operation

2. Maintenance of main structural components

1. Compressor: Disassemble the junction box, check whether the connection terminals are in tight contact and whether there are signs of rust and burnt black, and check whether the resistance values ​​between the three-phase windings are the same

2. Fins: Check whether the fins are dirty and blocked, clean them in time and keep them clean

3. Casing: Check whether there is scaling, and the scaling needs to be removed in time

3. Maintenance of main electrical components

1. General inspection of circuit breakers, AC contactors and relays: whether the wiring terminals are tight, rusted and blackened, close the switch, and check whether the input and output of each phase electrical terminal are connected; check whether the coils of AC contactors and relays are on and off. Sensitive and complete suction.

2. Capacitor: check whether it is bulging and leaking oil

3. Main board: Check whether the power light is on, whether the fuse is blown, and whether there are burn marks on the board surface

4. Wire controller: Check whether the buttons are sensitive, whether the interface is incompletely displayed, and whether the temperature can be set

5. Transformer: Check whether the primary voltage and secondary voltage match the nameplate

4. Maintenance of main waterway components

1. Water replenishment device: Check whether the water replenishment pressure is more than two kilograms and whether the check valve is stuck

2. Filtration device: Check whether the filter is dirty and blocked, and it needs to be cleaned regularly

3. Exhaust device : Check whether it can exhaust normally. If it cannot be exhausted normally, you need to disassemble and clean the filter screen inside

4. Water pump device: Check whether it is running smoothly
, Temperature and water temperature to determine whether the unit is in heating mode, but the antifreeze function is not a panacea, the following points should be noted:

1. The unit cannot be powered off. After the power is cut off, the unit will not automatically turn on, so there is no antifreeze function. 2. If it is not used
in a short period of time, antifreeze can be added to the water system for double protection
. 3. If it is not used for a long time, it is best Drain all the water in the system, and then disconnect the power supply of the unit. In places with regional power outages, it is more important to cut off the power after draining the water. 4. Each brand has instructions on the choice of antifreeze and the
amount to add. Be sure to understand clearly from the seller. 6. Shutdown and initial startup

When the machine is stopped for a long time, it should be closed for maintenance, and the water in the water pump and the entire water pipeline should be drained to prevent freezing and cracking of the water pump and water pipeline. Water should be drained from the bottom drain of the water pump and the casing heat exchanger. If the unit has been shut down for a long time, the following preparations must be made when restarting:
1. Thoroughly inspect and clean the unit
2. Clean the water piping system
3. Check the water pump, regulating valve and other equipment in the water piping system
4. Check whether all wire connections are Fastening
5. The most important point: If you want to turn on the machine for the first time in the cold winter, please turn on the power and preheat it for more than 12 hours in advance. Do not add water to the system during the preheating period. After preheating, let the water pump heat up first. , and then turn on the pump to replenish water 7. Replacement of parts. If any parts on the unit are damaged and need to be replaced, you need to contact the corresponding manufacturer of the unit to purchase. You should use the company’s original parts, and do not replace any different parts casually. .

　　Reminder: As the saying goes, the original equipment is the best. If you replace other accessories of different models, it may cause the unit to be incompatible with the accessories, or even burn out. The above is the introduction of Xiaobian to everyone on how to do the usual maintenance of heat pumps.