LGRED Heat General Service Manual

Part 5. Trouble Shooting
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Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check Point
1. Check the power source.(230V ±15%)
2. Check the fan operation is right.
3. Check the current.
4. Check the install condition.
5. Check the CT Sensor Output signal
(18/24/30 kBtu/h class - Check output the CT Sensor : DC 2.5±0.2V)
(36/42 kBtu/h class - Check output pin 1.2 of the CT Sensor : 5V )
Vdc
2.5V
I_INI_IN
GNDGND
Red
Black
<CT Sensing Check Point>< Inverter PCB>
▶36,42kBtu/h class
▶18,24,30kBtu/h class