Way Valve - LG MULTI V Service Manual

2.7 4 way Valve

1. Keep it off before the outdoor unit is powered on and the indoor unit is turned on.
2. Cooling, defrosting, oil recovery : OFF, heating : ON
3. When alternating cooling to heating, transform 4 way valve during re-starting for 3 minutes.
4. To check the mode of cooling/heating operation of 4 way valve, touch the piping surface of low pressure service valve.
5. Refrigerant flowchart of 4 way valve
On
4way Valve 1
Off
4way Valve 2
On
4way Valve 1
Off
4way Valve 2
6. Insulation resistance in the state of connecting the valve to coil should be over 100mΩ when measure it with DC
mega tester(DC 500 V).
Heat Recovery
Heating Operation
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Outdoor Heat
Exchanger
Heat Pump
Heating Operation
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Outdoor Heat
Exchanger
Checking Method for Key Components
Cooling Operation
Off
Indoor Heat
Exchanger
Off
Indoor Heat
Exchanger
Cooling Operation
Off
Indoor Heat
Exchanger
On
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All rights reserved. Only training and service purposes.
Outdoor Heat
Exchanger
Outdoor Heat
Exchanger
Outdoor Heat
Exchanger
D : Discharge
E : Evaporator
C : Condensor
S : Suction
Outdoor Heat
Exchanger