SiUS281117
Troubleshooting by Remote Controller
154
Service Diagnosis
2.37 Momentary Overcurrent of Inverter Compressor
Remote
Controller
Display
L5
Applicable
Models
RZR, RZQ
Method of Error
Detection
The error is detected from current flowing in the power transistor.
Error Decision
Conditions
When overcurrent flows in the power transistor
(Instantaneous overcurrent also causes activation)
Supposed
Causes
Defective compressor coil (disconnected, defective insulation)
Compressor startup error (mechanical lock)
Defective inverter PCB
Troubleshooting
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
The
compressor
'
s coil
is disconnected or the
insulation is
defective.
Inverter
output voltage
check Inverter
output voltage is not
balanced. (Normal if within
±
5V) Must be
measured when
frequency is
stable.
There is
instantaneous power
drop.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Compressor inspection
Caution
Replace the compressor.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
Replace the inverter unit.
Correct power supply.
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
YES
NO
YES
NO
YES
NO
