Hitachi RPI-0.8FSG1 Service Manual page 60

TROUBLESHOOTING
Alarm
Code
G "RUN" light flickers and "ALARM" is indicated on the remote control switch.
G The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the unit No. and alarm code are indicated on the display of the outdoor unit PCB.
# This alarm code is indicated when the running current of the indoor fan motor is higher than 1A.
Does the indoor
fan run?
Yes
Phenomenon
Activation of
Overcurrent
Protection
Device for
Indoor Fan Motor
1-50
Activation of Protection Device for Indoor Fan Motor
In the case of Hi-Tap
No
setting, is the voltage
between #5-#31 of
CN29 on PCB normal?
Yes
Is connection bad at
the connector?
Yes
Is the coil resistance
of fan motor normal?
Yes
Check the dislocation of
motor shaft and the
obstacle of current of air.
Cause
Faulty Indoor Unit
Fan Motor
Fault
Insufficient
Faulty PCB
Contacting
Incorrect
Connection
(RPK-Model)
No
Is the fuse (EF1,
EF2) cut out?
No
No
No
Check Item
Measure coil
resistance and
insulation resistance.
Check the output voltage
and fuse in the case of
Hi-Tap Setting.
Measure resistance
by tester.
Check connections.
Yes
Replace the PCB.
Replace the motor.
Repair wiring and
connections.
Replace the motor.
Action
(Turn OFF Main Switch)
Replace motor if faulty.
Replace PCB.
Correct looseness.
Replace connectors.
Repair connections.