Solenoid Valve - LG Multi V Water IV ARNU07GTU 2 Series Service Manual

2.7 Solenoid Valve

Check the conformity of the operation of solenoid valve to the output sigh of control board.
1) Oil solenoid valve
1. It is located in the bottom of accumulator, and it starts operating after some period of time of the compressor opera-
tion to provide oil stored in the bottom of the accumulator to the compressor.
2. When the compressor starts operating, oil solenoid valve will be on for 2 minutes. Check if there is operation noise
or piping vibration on the solenoid valve.
3. It turns on right after the compressor stop operating.
4. Solenoid valve can turn on and off repeatedly by the condition of cycle operation; this does not indicate the break-
down of the unit.
5. Insulation resistance in the state of connecting the valve to coil should be over 100mΩ when measure it with DC
mega tester(DC 500V).
2) Partial defrosting solenoid valve
1. Defrost operation eliminates ice attached on heat exchanger, recovering performance of heat exchanger.
2. Two solenoid valves will be on by turns in the extent of 6 minutes when separated defrosting is on.
3. It will be turned off right after the end of separated defrosting.
4. The change of the operation condition by the operation of solenoid valve can be checked by the before and behind
temperature of bypass piping and the sound of refrigerant.
5. Insulation resistance in the state of connecting the valve to coil should be over 100mΩ when measure it with DC
mega tester(DC 500V).
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Checking Method for Key Components
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