Hitachi RPI-0.8FSG1 Service Manual page 53

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 temperature of the internal thermostat (.) for the outdoor fan
motor is higher than 130°C.
Does the outdoor
fan run?
Yes
Phenomenon
Activation
of Internal
Thermostat for
Outdoor Unit
Faulty
Fan Motor
Internal
Thermostat
Activation of Protection Device for Outdoor Fan Motor
Is continuity present after
No
temperature has dropped to
under 83
thermostat of the outdoor
fan motor?
Is connection bad at the
connector PCN14 on PCB1 or
fan motor connectors (CN1, CN2,
CN50, CN51, CN52)?
<Common>
Is 220V or 240V applied across
R2 and S2 on PCB2 (AC Chopper)?
Is 220V or 240V applied across
R2 and N of TB1?
Replace the outdoor fan motor
if faulty. Or check outdoor
temperature. If it is unusual,
take suitable action to reduce it.
Cause
Faulty Outdoor Unit
Fan Motor
Fault
Insufficient
Contacting
Incorrect
Connection
/ Check Item
HP Mark
5 to 20HP ITO1, 2
24, 30HP ITO1, 2, 3 380-415V 50Hz, 380V 60Hz
ITO1, 3
o
C at the internal
Yes
No
Yes
Check Item
Measure coil
resistance and
insulation resistance.
Check continuity after
fan motor temperature
decreases to room temp.
Measure resistance
by tester.
Check connections.
TROUBLESHOOTING
Power Supply
380-415/380V, 220V 50/60Hz
220V 60Hz
No
Replace the motor.
Yes
Correct connection.
Replace the connector.
If the voltage is over
264V or under 187V,
No
check the power source
and check the wiring
around the outdoor unit
PCB.
Action
(Turn OFF Main Switch)
Replace motor if faulty.
Replace fan motor if no
continuity of internal
thermostat under 83
Correct looseness.
Replace connectors.
Repair connections.
o
C.
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