Alarm code
5b
Activation of fan controller overcurrent protection device (1).
• 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.
PCB1: Control PCB in Outdoor Unit
Is the cause of
stoppage " " of
troubleshooting by
7-segments display
"2" or "4"?
Refer to next page.
Cause of fan controller overload
Restart operation.
No
Smaller than
activ
ation current.
Y
es (Fan controller is normal.)
Does the fan stop by
the foreign matter?
Is f
an rotated reversely
due to contr
ar
y wind?
Is the fan controller
current larger than
activ
ation current? *1)
"2"
"4"
Chec
k for clogging of
the heat e
xcha
nger.
Check the fan motor.
Replace
the f
an controll
er. *2)
Abnormal
*1): Regarding the activation current value setting, refer to Inverter specifications, see on page 330.
*2):
Carry
out the electrical discharge when fan controller is checked or replaced, refer to: Checking procedures for other
main parts, see on page 267.
8 Troubleshooting
229
SMGB0065 rev. 1 - 12/2010
8
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