Compressor blocking and turning from the anatomical phenomenon of most fault compressors, there is no lack of oil inside the compressor, holding the shaft blocking and turning is caused by poor instantaneous lubrication, and the main reason leading to poor lubrication is the change of lubricating oil quality, the oil is diluted or the oil level is raised by the refrigerant liquid.

Compressor pure motor burn two reasons:

 Motor temperature rise is too high;

the refrigeration system is not clean inside.

Motor temperature rise is too high: When Heat pump mechanism is hot in winter, the working condition is quite bad, especially when the environment temperature is very low, the heat exchange quantity is very small, the refrigerant circulation quantity is also small, the return air pressure is low, in addition to the electric control defrosting is not prompt and thorough, will lead to inadequate motor cooling, coil heating, insulation damage, Motor short-circuit burn-out. The refrigeration system is not clean: in addition, the refrigeration system is not clean, contains impurities, impurities corrosion and wear motor coil, resulting in short-circuit burn.

3, communication failure reason analysis: check whether the four core wire of the electronic control motherboard and the panel is in good contact; check whether there is 12V power output, voltage is too high or too low; check whether the panel itself is in trouble; check whether the panel and the motherboard are matched; Keep the power from interfering with communications.

4, water temperature, environment, defrosting, backwater temperature sensor failure reason analysis: check whether the temperature sensor line is broken or damaged phenomenon; check whether the Sensor Resistance is normal; check whether the sensor resistance is bad.

5, water flow failure reason analysis: check whether the pump is open and whether there is air in the pump; check whether there is water in the tank; check whether the water flow switch is damaged; check whether the water flow switch two lines to the motherboard in good contact.

6, high-pressure protection reason analysis: Check whether the unit is really high-pressure protection in operation; check whether the high-pressure protection failure check whether the pump is air, whether the water pipe filter is blocked; check whether the unit system is blocked, mainly expansion valve, capillary, filter; check whether the high-voltage switch is broken; check whether the two lines connecting the high-voltage switch on the electronic control board are in good contact; check whether the high-voltage function of the Electronic Control Board is invalid.

7, low-voltage protection reason analysis: Check whether the refrigerant leak; check whether the low-voltage meter operation is really low-voltage protection; check whether the unit system expansion valve, capillary, filter plugging; Check whether the two lines connected with the low-voltage switch on the Electronic Control Board are in good contact; check whether the low-voltage function of the Electronic Control Board is invalid; check whether the system is leaking cold medium.

8, three-phase protection (phase sequence error, missing phase, current is too large) reason analysis: check the unit power three-phase missing phase; phase sequence board on the two lines to the main board terminal contact is good; check the voltage is too low, power line capacity is not enough, especially the case of a very long power cord

9, power but the motherboard and panels are not power cause analysis: check the motherboard power terminal wire and zero wire between whether there is 220V power; check the motherboard on the fuse has burned; Check the transformer and see if the three terminals on the transformer connection motherboard are plugged in;

10, power switch trip cause analysis: If a trip on the power supply line leakage, short circuit, grounding phenomenon check whether make-up Valve, backwater valve, water valve, one of a work jump;

11, water temperature does not rise reason analysis: check whether there is leakage of fluoride, observe the high and low pressure of the unit; check whether the amount of water exceeds the unit's water output; check whether the unit's circulating pipe, water supply hot water pipe, return water pipe insulation effect is good; Check whether the unit is equipped with small, especially the temperature control backwater project in winter low temperature backwater this piece to lose a large part of the heat to supply.

12, defrosting problem reason analysis: check whether the defrosting probe is faulty; check whether the defrosting probe and evaporator are in good contact, the position is very correct; check whether the defrosting probe is invalid; Check if there is any problem in setting parameter .

13, cause analysis of the unit not running: check the power supply failure to disconnect the power supply switch, check the power supply; check the power supply loose to disconnect the power supply switch, check the power supply; check the Unit to control the power supply fuse to fuse, find out the cause and fix it, replace the new fuse.

14, pump operation but the water does not cycle or pump noise big reason analysis: water shortage inspection system in the water supply system replenishment device, and to the system water replenishment; Check the water system valve all open, the Water System Valve open full; check water filter dirty block, clean water filter.

15, unit heating capacity on the low cause analysis: check whether the refrigerant is insufficient, the system leak detection and filling of refrigerant; check whether the water system insulation is bad, strengthen the water system insulation; check whether the drying filter is blocked, replace the drying filter; Check whether the air heat exchanger is poor, clean the air heat exchanger; check whether the water flow is insufficient, clean the water filter.

16, the compressor does not run reason analysis: check whether the power supply failure, find out the reason to solve the power supply failure; check whether the wiring is loose, find out the point of looseness and repair; check whether the compressor overheating protection, find out the cause of heat after troubleshooting before starting; Check if the water temperature is too high, reset the water temperature; check if the water flow is insufficient, clean the water filter to remove air from the system.

The collation comes from the "encyclopedia of refrigeration, "

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