Hitachi RAS-(4-12)HNP(1)(E) - Activation of the Protection Device for the Indoor Fan Motor (Except RCI-FSN3, RCIM-FSN3, RPC- FSN3 and RPK-FSN(H)3 M)

8 Troubleshooting
244
SMGB0087 rev.0 - 12/2013
Alarm code
19
Activation of the protection device for the indoor fan motor (except RCI-FSN3, RCIM-FSN3, RPC-
FSN3 and RPK-FSN(H)3M)
- This alarm code is displayed when the temperature of the internal thermostat for the indoor fan motor is higher than
135 ºC.
Is the continuity present at the
internal thermostat of the indoor
fan motor?
Replace the motor
No
Yes
Is the connection bad at the
connector?
Repair the wiring and
the connections
Yes
Yes
Replace the motor
No
Is the coil resistance of the fan
motor normal?
Check the indoor temperature.
If the indoor temperature is unusual,
take a suitable action to reduce the
indoor temperature
No
No
Does the indoor
fan run?
Yes
Is the fan mo-
tor hot?
No
Yes
Phenomenon Cause Check item
Action
(Turn OFF the main switch)
Activation of the internal
thermostat for the indoor
unit fan motor
Faulty indoor unit fan motor
Measure the coil
resistance and the
insulation resistance
Replace the motor if faulty
Faulty internal
thermostat
Fault
Check the continuity
after the fan motor
temperature decreases
to room temp
Replace the fan motor if there
is no continuity
Insufcient contacting
Measure the resistance
by means of the tester
Correct looseness.
Replace the connectors
Incorrect connection Check the connections Repair the connections