App. Service & Replace Method Of Control Box, Inverter Pcb; Ⅳ. Function Control - LG MULTI V 5 Manual Book

App. Control Box, Inverter PCB Service and Replace Method
n Control box / Inverter PCB Servicing / Dismantling Procedure.
WARNING
• Do not pull out the heat sink assembly before removing the middle bracket
screws.
• Do not apply heavy force on tube parts while detaching the heat sink
assembly.
It may damage and leads to failure of device. Gently detach total heat sink
assembly.
n Control Box assembly Servicing / Dismantling Procedure
1. Remove the 2. Remove the middle bracket screws
control box as shown in the figure.
cover.
Mid bracket screw
n Inverter PCB Servicing / Dismantling Procedure
1. Remove the Thermal Pad mount- 2. Carefully pull out the Inverter
ing screws at the left side of the PCB from control box assembly.
control box (4EA)
4. Unscrew the middle IGBT mount- 5. Finally take out the PCB from the
ing screws (2EA) corner supporters.
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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Mid bracket
screws
Heat sink assembly
3. Gently detach the
Heat sink assembly
from the control box
Mid bracket
Mid bracket
Heat sink assembly
3. Detach the Compressor (U/V/W)
and the power input (R/S/T) lead
wires.
6. Follow the same procedure (1~5)
inversely to reassembly the
inverter PCB.
Note.
1. Apply thermal grease at heat sink
if needed.
2. Carefully reconnect the wires with
out interchanging the locations.
- 107 -
LGE Internal Use Only
Ⅳ. Function Control
1. Generation 4 Features
2. Function Control Setting
3. FDD Mode
4. Function Mode
5. SVC Mode
6. IDU Mode
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