LG AMNW07GSJA0 Svc Manual page 149

5. Trouble Shooting
6.7 Troubleshooting Outdoor Error
Checking single units of sensors
Purpose
Pressure sensor
- Position : Outlet of 4-way valve (based on cooling mode)
Checking start
After power supplied,
the pressure on LGMV
is normal before
operating?
Yes
No malfunction of the pressure
sensor
- In case of UU09WR, UU12WR Model, check the ejection of Sub PCB.
Ejection of sub PCB
Items for checking Measurement of the unique resistance by
for fault
The location and
No
connection of connector
is normal on PCB?
Voltage of 5V is output
from the PCB?
Replace the pressure sensor
sensor temperature.
No
Yes
No
Yes
Insert the sub PCB to the Main PCB
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Reconnection
PCB checking and replacement