Service Manual 47
PACKAGE AIR CONDITIONER VOLTAGE LIMITS
1) Both the blower and the compressor do not work
Troubleshooting Guide
NAME PLATE RATING MINIMUM MAXIMUM
380 - 415 V 342 V 456 V
2) Only blowers do not work
WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY
Other parts than the unit
Magnetic switch for com-
pressor & fan motor
Operating switch
Protection devices
Electric supply interrupted
Defective power wiring
Cut of power fuse
Too low voltage
Control point is on condi-
tion of "OFF" due to trou-
ble.
Troubled or defective
contactor
Opened the contact point
with trouble
Measure it with a tester in
case that the same power
source is supplied to other
equipment than the unit,
what and where trouble
can be discovered by
checking the operation of
other equipment.
Measure it with a tester.
Make short-circuit, then
measure it with a tester.
Check it with the eyes or
tester.
Check it with the eyes or
tester.
Repair a switch box and
is relative instrument.
Replacement of fuse
Request a power
supplier to repair.
Check the power source.
Use a thick cable if neces-
sary.
Replace it if necessary.
Repair or replace it.
Discover the trouble
cause and push the rest
button.
WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY
Air volume change over
switch
Capacitor
Troubled or defective
contact point
Defected
Check it with the eyes or a
tester
Check it with a tester.
Repair or replace it.
Replace it.
No cooling and heating operation performed
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