Troubleshooting
Samsung Electronics12-68
■
: Indoor unit freezing protection
Outdoor unit display
Indoor unit display
Judgment method
Causes
(Operation) (Timer) (Fan) (Filter) (Removing frost)
- When the temperature of indoor unit heat exchanger on cooling operation maintains
over 5 minutes below -4˚C
- Indoor fan motor defect or lock
- EEV open error
Yes
Yes
Yes
Check the indoor unit detected freez-
ing.
Error reset(KEY3)
It is completed to check the system.
Test operation for every
room(KEY 4)
Operate a corresponding
indoor unit.
Remove the obstacles of
corresponding indoor unit and clean
the dust filter.
Does operate normally the
indoor unit fan motor?
Is the voltage
of PCB fan motor output
terminal normal?
Replace the motor after checking
the connection wire of fan motor.
After checking the quantity of
refrigerant, if needed recharge
the refrigerant.
Restart after PCB
exchange.
Is high/low pressure normal ?
✳If the outdoor temperature is so low(below -5˚C) or a number of indoor unit is off simultaneously, the indoor unit can be frozen in an instant.
No
No
No
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