LG AB-H1208VA0 Service Manual page 14

Troubleshooting Guide
VOLTAGE LIMITS
NAME PLATE RATING
380 - 415 V
1. No cooling and heating operation performed
1) Both the blower and the compressor do not work
WHAT TROUBLED
Other parts except the
unit
Magnetic switch for com-
pressor & fan motor
Operating switch
2) Only Indoor blowers do not work
WHAT TROUBLED
Motor
Reactor
Electric wiring
COMPLAINTS
• Electric supply interrupted
• Defective power wiring
• Cut off power fuse
Too low voltage
Control point is on condi-
tion of "OFF" due to trou-
ble.
Troubled or defective
contactor
COMPLAINTS
• Over heated
• Wiring short
Defected
• Cut- OFF of wiring
• Short circuited on
operation
MINIMUM
342 V
HOW TO CHECK
Measure power sypply
with a tester in case that
the same power source is
supplied to other equip-
ment except the unit,
what and where troubled
can be discovered by
checking the operation of
other equipment.
Measure it with a tester.
Make short-circuit, then
measure it with tester.
Check it with the eyes or
tester.
HOW TO CHECK
Check it with tester
Check it with a tester.
Check it with a tester.
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MAXIMUM
456 V
REMEDY
• Repair a switch box and
relative instrument.
• Replacement of fuse
• Request a power
supplier to repair.
Check the power source.
Use a thick cable if nec-
essary.
Replace it if necessary.
Repair or replace it.
REMEDY
Repair or replace it.
Replace it.
Rewiring or Repair.