Service diagnosis
7.4.3 Indoor DC fan motor malfunction
Indoor Display
E14
()#$*+,
1. Check connector connection.
2. Check motor power supply voltage output (pins 1-4).
3. Check motor control voltage (pins 4-5).
4. Check rotation command voltage output (pins 4-6).
5.
Check rotation pulse input (pins 4-7).
-.the a/c is electrifying, don’t pull out or insert the terminals of the motor, or else the motor would be
Damaged.
Domestic air conditioner
Method of
malfunction
detection
Malfunction
detection
conditions
Troubleshooting
The fan speed detected by the Hall IC during fan motor running which is used
to determine the fan motor operating
When there is no fan speed feedback signal within 2 minutes
ƵOperation halt due to breaking of wire inside the fan motor
ƵFan motor overheat protection
ƵOperation halt due to breaking of the fan motor lead wires
ƵDetection error due to faulty indoor PCB
Supposed
causes
'
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
/
%
0
Motor power supply voltage
Unused
Unused
P.0V (reference potential)
Motor control voltage (15 VDC)
Rotation command voltage (1~6 VDC)
Rotation pulse input
2##!3#)##
4
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