Hitachi FSG Series Service Manual page 47

Alarm Code
19
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 running current of the indoor fan motor is higher than 1A.
No
Does the indoor
fan run?
Yes
Phenomenon
Faulty Indoor Unit Fan Motor
Activation of
Over Current
Protection
Device for
Indoor Fan
Faulty PCB
Motor
Activation of Protection Device for Indoor Fan Motor
In the case of Hi-Tap
setting, is the voltage
between #1-#5 ofCN29
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
Fault
Insufficient
Contacting
Incorrect
Connection
TROUBLESHOOTING
(RPK-Model)
No
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.
1
39
Yes
Replace the PCB.
Replace the motor.
Repair wiring and
connections.
Replace the motor.
Action
(Turn OFF main switch)
Replace motor if faulty.
Replace fan motor if no
continuity
Correct Looseness.
replace connectors.
Repair connections.