Hitachi FS3 Series, Service Manual, Page: 47 / 240

1
TROUBLESHOOTING
39
Alarm Code
19
Activation of Protection Device for Indoor Fan Motor
(RPK-Model)
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?
No
In the case of Hi-Tap
setting, is the voltage
between #1-#5 ofCN29
on PCB normal?
No
Is the fuse
(EF1, EF2) cut out?
Yes
Replace the PCB.
Yes
Yes
No
Replace the motor.
Is connection bad at the
connector?
No
Repair wiring and
connections.
Yes
Is the coil resistance of
fan motor normal?
No
Replace the motor.
Yes
Check the dislocation of
motor shaft and the
obstacle of current of air.
Phenomenon Cause Check Item
Action
(Turn OFF main switch)
Faulty Indoor Unit Fan Motor
Measure coil resistance
and insulation resistance.
Replace motor if faulty.
Fault
Check the output voltage
and fuse in the case of
Hi-Tap setting.
Replace fan motor if no
continuity
Insufficient
Contacting Measure resistance by
tester.
Correct Looseness.
replace connectors.
Activation of
Over Current
Protection
Device for
Indoor Fan
Motor
Faulty PCB
Incorrect
Connection
Check connections. Repair connections.