LG AHUW096A0 - Troubleshooting Guide

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Only for training and service purposes
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Trouble Shooting Guide
01 Problem in Remote Room Air sensor
02 Problem in Refrigerant (Inlet side) sensor
06 Problem in Refrigerant (Outlet side) sensor
08 Problem in Water Tank sensor
13 Problem in Solar-thermal sensor
16 Problems in sensors
17 Problem in Water-inlet sensor
18 Problem in Water-outlet sensor
19 Problem in Water-interlim sensor
• Incorrect
connection
between
sensor and
PCB
• PCB fault
• Sensor fault
• Resistance: 10k ohm at 25 centigrade
(unplugged)
for Remote Room Air sensor
• Resistance: 5k ohm at 25 centigrade
(unplugged)
for all sensors EXCEPT Remote Room
Air sensor
• Voltage: 2.5Vdc at 25 centigrade
(plugged) (for all sensors)
• Refer resistance-temperature table to
check in different temperature
Code
No.
Description Cause Normal Condition
Ω
10kΩ
Unplugged Plugged
Check the resistance
Check the voltage
V
2.5Vdc
4. Trouble Shooting Guide
■ Error diagnosis and countermeasure flow chart
Is sensor properly
connected to PCB?
Is the resistance value
of sensor normal?
Connect properly to PCB
Change the sensor
Change the PCB
Yes
Yes
No
No