How to replace the high and low temperature damp heat chamber compressor

How to replace the high and low temperature damp heat chamber compressor
1. Cut off the power supply of the high-low temperature damp heat test box, open the end cover of the outdoor unit cable, remove the power cord and the indoor and outdoor machine control connection cables, and wrap them separately with insulating tape.
2. Place an oil pan under the two-way valve and the three-way valve and use a wrench to unscrew the bonnet on the valve body.
3, use the Allen wrench clockwise to close the two, three-way valve spool.
4. Slowly loosen the connection caps on the two- and three-way valves with adjustable wrenches to release the refrigerant from the refrigeration system.
5. Wrap the connection tube mouth with plastic tape to prevent moisture and dust from entering.
6, slowly open the two-way valve and three-way valve, let go of the residual refrigerant, wipe off the splattered oil.
7. Use a wrench to unscrew the compressor connection cover screw, remove the terminal box cover and rubber mat, and unplug all the wiring on the compressor connection plug.
8. Use a socket wrench to unscrew the retaining nut on the compressor foot.
9. Use a welding tool to separately melt the weld and use a pair of pliers to pull it open.
10. Lift the compressor of the high-low temperature tester vertically upwards from the stand and remove the vibration-damping washer on the base.
Note: If the system is dirty, clean the system before replacing the compressor in the high-low temperature damp heat chamber.
Repair Case Failure Symptom: KFR - 75LW/CID is not cooled and "E04" is displayed.
Analysis and treatment: First, the current is detected with a clamp meter. After the compressor is started, the current rapidly rises to 35A and the machine stops. After 3 minutes, the compressor restarts. After four such cycles, the machine displays the "E04" code. After checking the electronic control, there is no problem, and then check the AC contactor and the compressor capacitance is also no problem, it is judged as a compressor failure, measuring the compressor coil resistance is normal, it is judged as high and low temperature testing machine compressor shaft (card cylinder) . Add twice the starting capacitor drag is unsuccessful, after the phase wire to the "S", R" terminal, zero wire connected to the "C" terminal, no effect after dragging, according to the normal steps to replace the compressor, test machine normal.

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