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 REACTOR_IN and REACTOR_OUT1,2 Connection condition at the Main PCB.(Refer to outdoor
wiring diagram)
2. Measure the voltage as shown in figures.
3. If the measurements are significantly different from the levels shown in the figures, the PFCM is deemed to be
damaged.
IN
OUT
OUT
Red
Black
Vdc
Sequence of
Measurement
Measurement
Normal
Standards
Sequence of
Measurement
Measurement
Normal
Standards
1 C – E 0.3V~0.5V
2 C – E 0.3V~0.5V
ڹ
ڸ
0.3 ~ 0.5 V
< IGBT >
ڸ
ڹ
ڸ
ڹ
C : Collector / E : Emitter
1 A – C 0.3V~0.5V
2 A – C 0.3V~0.5V
< FRD >
A : Anode / C : Cathode
ڸ
ڹ
IGBT IGBT FRD
▶18,24,30kBtu/h class