LG Multi V Service Manual

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Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
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
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).
D : Discharge
E : Evaporator
C : Condensor
S : Suction
Checking Method for Key Components
Heat Recovery
Heating Operation Cooling Operation
4way Valve 1
4way Valve 2
Outdoor Heat
Exchanger
On
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Off
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Off
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Off
Heat Pump
Heating Operation Cooling Operation
4way Valve 1
4way Valve 2
Outdoor Heat
Exchanger
On
Outdoor Heat
Exchanger
On
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Off
Outdoor Heat
Exchanger
Indoor Heat
Exchanger
Off

LG Multi V Specifications

General

Type	VRF (Variable Refrigerant Flow)
Compressor Type	Scroll
Refrigerant	R410A
Energy Efficiency	High
Control System	Centralized and individual control options
Indoor Units	Multiple types available (e.g., ceiling cassette, wall-mounted, ducted)