The knowledge of water-to-ground source heat pump unit maintenance

Water-to-ground source heat pump units, just like our common cars, need to rely on repairs and maintenance to extend their service life, and at the same time they can exert better performance. However, as for the maintenance and maintenance of water-to-ground source heat pump units, everyone usually only knows one or two things, and cannot master it well. At this time, it often adds a lot of trouble to the maintenance of water-source heat pumps, so specific What are the maintenance aspects? Air conditioner maintenance manufacturers come to tell everyone!

one. Check the operation of the unit, check the operation record and the alarm content of the unit

1. Check the operating record of the unit and analyze the alarm content.

2. Check the possible occurrence points of the alarm.

3. Record the current problems of the unit.

two. Check the external situation of the unit

1. Check the appearance of the unit for corrosion and pollution.

2. Check the leakage status of the external interfaces and solder joints of the unit.

3. Check that the bases of compressors, motors and other components are fixed.

4. Check and tighten the fixing conditions of the moving parts of the unit and system pipeline parts, including foot bolts and tightening screws.

5. Check the reliable connection of the pressure hose connector on the unit, and check the fixing of the compressor base.

6. The expansion valve is fixed and reliable, and the temperature sensing bulb and balance pipe are fixed and reliable.

7. Check that the evaporator and condenser connections are fixed and reliable.

three. Check the system and lubrication system

1. Check the compressor lubricating oil quality and replace the lubricating oil if necessary.

2. Clean or replace the lubricating oil filter.

3. Clean the compressor oil pan.

four. Check the insulation resistance value and operating current value of the compressor and motor on the side

1. Measure the insulation value of the compressor motor.

2. Check the three-phase operating current value of the compressor after operation.

five. Check the electrical wiring and operation reliability in the control box, and avoid abrasion and damage during operation due to contact, vibration, etc.

1. Check that the wiring post in the compressor junction box is securely fixed.

2. Check that the contacts of the circuit in the control box are fixed and reliable.

six. Check the condition of electrical components such as contactors, solenoid valves, etc.

Check that the solenoid valve coils of the unit are in good condition and operate correctly, and if necessary, maintain and replace them.

seven. Check the setting value of each sensor, instrument and pressure switch of the unit calibration

1. Check chilled water, cooling water, inlet and outlet water temperature sensor, exhaust temperature sensor, flow switch.

2. Check the values of high and low pressure sensors and water source temperature sensors.

3. Check the spray temperature sensor of screw compressor.

4. Check the reliability of the high and low voltage switches.

The above is the knowledge of the Shanghai central air-conditioning engineering manufacturer to explain the maintenance work of the water-to-ground source heat pump unit for you. I don’t know if it can help you. If you have any questions, please feel free to call us. We will serve you wholeheartedly!