Troubleshooting Guide
— 33 —
PACKAGE AIR CONDITIONER VOLTAGE LIMITS
1. No cooling and heating operation performed
1) Both the blower and the compressor do not work
NAME PLATE RATING
MINIMUM
MAXIMUM
380 - 415V
342V
456V
2) Only Indoor blowers do not work
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Other parts except the
unit
Magnetic switch for
compressor & fan motor
Operating switch
• Electric supply interrupted
• Defective power wiring
• Cut off power fuse
Too low voltage
Control point is on
condition of "OFF" due to
trouble.
Troubled or defective
contactor
Measure power sypply
with a tester in case that
the same power source is
supplied to other
equipment 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.
• 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
necessary.
Replace it if necessary.
Repair or replace it.
WHAT TROUBLED
COMPLAINTS
HOW TO CHECK
REMEDY
Motor
Electric wiring
• Over heated
• Wiring short
• Cut- OFF of wiring
• Short circuited on
operation
Check it with tester
Check it with a tester.
Repair or replace it.
Rewiring or Repair.
