Trouble Shooting Guide - LG Therma V AHBW A0 Series Service Manual

3. Trouble Shooting Guide

Display
Description
code
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
n Error diagnosis and countermeasure flow chart
Is sensor properly
connected to PCB?
Yes
Is the resistance value
of sensor normal?
Yes
Change the PCB
Unplugged
10 kΩ
Check the resistance
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Only for training and service purposes
Cause
• Incorrect
connection
between
sensor and
PCB
• PCB fault
• Sensor fault
No
Connect properly to PCB
No
Change the sensor
Plugged
2.5 V DC
V
Check the voltage
- 49 -

Trouble Shooting Guide

Normal Condition
• Resistance: 10kΩ ohm at 25 centigrade
(unplugged)
→ for Remote Room Air sensor
• Resistance: 5kΩ ohm at 25 centigrade
(unplugged)
→ for all sensors EXCEPT Remote Room
Air sensor
• Voltage: 2.5 V DC at 25 centigrade
(plugged) (for all sensors)
• Refer resistance-temperature table to
check in different temperature
LGE Internal Use Only