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Domestic air conditioner
HSU-09/12RS03/R2(SDB) Service Diagnosis
7.4.2 Indoor fan motor malfunction
Indoor Display
E14
Method of
The rotation speed detected by the Hall IC during fan motor operation is used to determine
Malfunction
abnormal fan motor operation
Detection
Malfunction
when the detected rotation feedback singal don’t receiced in 2 minutes
Decision
Conditions
Supposed
Operation halt due to breaking of wire inside the fan motor .
Causes
Fan motor overheat protection
Operation halt due to breaking of the fan motor lead wires
Detection error due to faulty indoor unit PCB
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector,
or else parts damage may be occurred.
Check whether Terminal on the indoor
/outdoor mainboard is well inserted.
Is it normal?
Yes
NO
Reinsert the terminals
Electrify the machine again and
turn it on in the Cool state with
the remote controller. check
whether motor can run˛
Yes
Measure the voltage between 6 and 4
of the terminal about 0-5v.
Is it normal?
N0
the motor of the indoor /outdoor
unit is damaged and needs
replacing.
Measure the voltage between 1 and 4 of the terminal
of fan motor on the indoor mainboard about
DC310V,Measure the voltage between 5 and 4 of
the terminal about DC15V. Measure the voltage
between 7 and 4 of the terminal about 1-6v.
NO
Is it normal?
The mainboard of the
indoor/outdoor unit is damaged
and needs replacing
N0
Yes
Yes
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