LG UM48 N34 - Page 74

- 74 -
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4. Trouble Shooting
Items for
checking
Sub-items for
checking
Checking
power source
Check-
ing for
over-load
operation
Checking
compressor
Checking
PCBA
Checking
input
voltage
Checking
outdoor
devices for
shielding
Checking
refrigerant
for over/short
Checking
Compressor
wiring
Checking
IPM
connection
state
Checking
power
connection
state
Checking
outdoor
fan operating
condition
Checking
sensor fault
Checking
Compressor
phase
resistance
Checking
single
unit of IPM
Checking
pipes
For bending /
blocking
Checking
4-way valve
Checking
compressor
Insulation
resistance
Checking
Compressor
current
detection circuit
Checking EEV
for motion
Checking DC
link voltage
Ⲽ4JOHMFQPXFSTPVSDF$IFDLJOHXIFUIFSUIFQPXFSJT"$_7
QIBTFQPXFSTPVSDF$IFDLXIFUIFSUIFMJOFWPMUBHFJT"$_7
Ⲽ3FGFSUPQBHF
Ⲽ$IFDLUIFNBOJGPMEHBVHFQSFTTVSF Ⲽ3FGFSUPQBHF
Ⲽ3FGFSUPQBHF
Ⲽ3FGFSUPQBHF
Ⲽ$IFDLJOHTDSFXT
GPSOPDPOOFDUJPOPS
VOGBTUFOJOH
Ⲽ3FGFSUPQBHF
Ⲽ3FGFSUPQBHF
Ⲽ3FGFSUPQBHF
Ⲽ3FGFSUPQBHF Ⲽ3FGFSUPQBHF
'MPXPGUSPVCMFEJBHOPTJT
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)