Troubleshooting by Indication on the Remote Controller
273
Troubleshooting
NO
Check
for power
supply voltage.
Voltage between
phases: 380 to 415V
Phase voltage:
220 to
240V
NO
YES
Onsite causes.
Make proper wire
connections
without open
phase, erroneous
connections, or
erroneous order
of phases.
Unbalanced
power supply?
(Not more than 2%:
Phase voltage of not
more than
approx. 5V)
NO
YES
Onsite causes
Correct the
unbalanced
loads to eliminate
the unbalanced
state.
Unbalanced
voltage will
cause extremely
unbalanced
current, thus
impairing the
service life of or
resulting in the
error of the
equipment.
The
insulation
resistance is low (i.e.,
not more than
100k
Ω
.)
YES
Replace the
compressor.
NO
The
insulation
resistance is low (i.e.,
not more than
1M
Ω
.)
YES
Replace the fan
motor.
Replace the fan
driver.
Disconnect the cable from
the compressor, and then
check the compressor for
the insulation resistance.
Disconnect the cable from
the fan, and then check
the fan motor for the
insulation resistance.
A
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Power ON
Power OFF
