Hitachi FSG Series Service Manual page 41

Alarm Code
09
n "RUN" light flickers and "ALARM" is indicated on the remote control switch.
n 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 (ITO1, 2) for the outdoor fan
motor is higher than 130 °C
Does the outdoor fan
run?
Yes
Phenomenon
Faulty Outdoor Unit Fan
Activation of
Internal
Thermostat for
Outdoor Unit
Fan Motor
Internal
Thermostat
Activation of Protection Device for Outdoor Fan Motor
No
Is continuity present after temperature
has dropped to under 83 °C at the internal
thermostat of the outdoor fan motor?
Is connection bad at the connector
PCN14 on PCB1 or fan motor
connectors (CN1, CN2) ?
<Common>
Is 220V or 240V applied across R2 and
S2 on PCB2?
Is 220V or 240V applied across EF5(1)
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
Motor
Fault
Faulty
Insufficient
Contacting
Incorrect
Connection
TROUBLESHOOTING
No
Yes
Yes
No
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.
1
33
Replace the motor
Correct connection. Replace
the connector.
If the voltage is over 264V or
under 187V, 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 °C.
Correct Looseness.
replace connectors.
Repair connections.