LG ATNH09GRLE2 Svc Manual page 122

6.7 Troubleshooting Outdoor Error
Pressure sensor
Checking start
After power supplied,
the pressure on LGMV
is normal before
operating?
Yes
No malfunction of the pressure
sensor
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Only for training and service purposes
The location and
No
connection of connector
is normal on PCB?
Yes
Voltage of 5V is output
from the PCB?
Yes
Replace the pressure sensor
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4. Trouble Shooting
No
Reconnection
No
PCB checking and replacement
LGE Internal Use Only