Activation Of The Protection Device For The Indoor Fan Motor (Except Rci, Rcim And Rpk) - Hitachi RAS-(3-6)HVRNM2E Service Manual

8 Troubleshooting
19
Alarm code
• The RUN LED flickers and "ALARM" is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section.
The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
- This alarm code is displayed when the temperature of the internal thermostat for the indoor fan motor is higher than
130 °C.
Phenomenon
Activation of the internal
thermostat for the indoor
unit fan motor
Faulty internal thermostat
240
SMGB0064 rev.0 - 08/2011

Activation of the protection device for the indoor fan motor (except RCI, RCIM and RPK)

Cause
Faulty indoor unit fan motor
Fault
Insufficient contacting
Incorrect connection
Check item
(Turn OFF the main
Measure the coil resistance
and the insulation resist- Replace the motor if faulty
ance
Check the continuity after
Replace the fan motor if
the fan motor temperature
there is no continuity
decreases to room temp
Measure the resistance
by means of the tester Replace the connectors
Check the connections Repair the connections
Action
switch)
Correct looseness.