Hitachi FSXN Series Service Manual page 235

8 Troubleshooting
5b
Alarm code
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the electronic thermal protection for the fan controller is activated ten times in thirty
minutes (retry operation is carried out up to nine times).
Activation condition;
Electrical current with 105% of the rated current runs continuously for thirty seconds, or
Electrical current runs intermittently and the accumulated time reaches to three minutes in a ten minute period.
Restart operation.
Is the fan controller
current larger than
activation current? *1)
No
Smaller than
activation current.
Abnormal
*1): Regarding the activation current value setting, refer to
*2): Carry out the electrical discharge when fan controller is checked or replaced, refer to:
main parts, see on page 267.
229
SMGB0065 rev. 1 - 12/2010
Activation of fan controller overcurrent protection device (1).
Is the cause of
stoppage "
troubleshooting by
7-segments display
"2" or "4"?
Yes (Fan controller is normal.)
PCB1: Control PCB in Outdoor Unit
"2"
" of
Refer to next page.
"4"
Cause of fan controller overload
Does the fan stop by
the foreign matter?
Is fan rotated reversely
due to contrary wind?
Check for clogging of
the heat exchanger.
Check the fan motor.
Replace
the fan controller. *2)
Inverter specifications, see on page 330.
Checking procedures for other
8