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11.4.3 Indoor DC fan motor fault
Indoor display
E14
Method of
DC fan motor is detected by checking the fan running condition and so on
Malfunction
Detection
Malfunction
when the data of EEPROM is error or the EEPROM is damaged
Decision
Conditions
Supposed
DC fan motor protection dues to the DC fan motor faulty
Causes
DC fan motor protection dues to faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
may be occurred.
Check whether Terminal on the indoor
mainboard is well inserted.
Electrify the machine again and turn it
on in the Cool state with the remote
controller. check whether motor can
run
Measure the voltage between 3 and 6 of
the terminal about 0-5v.
the motor of the indoor unit is damaged and
needs replacing.
Is it normal?
Yes
Yes
Is it normal?
N0
NO
Reinsert the terminals
NO
Measure the voltage between 1 and 4 of the terminal of
fan motor on the mainboard about DC310V, Measure
the voltage between 4 and 5of the terminal about
DC15V. Measure the voltage between 4 and 6 of the
terminal about 1-6v.
Yes
Is it normal?
Yes
The mainboard of the indoor unit is
damaged and needs replacing
52
Service diagnosis
or parts damage
N0
Domestic air conditioner
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