Heiko JS026-D1, Service Manual

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Service diagnosis
31 Domestic air conditioner
10.3.3 Indoor DC 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 signal don’t received in 2 minutes
Decision
Conditions
Supposed Operation halt due to breaking of wire inside the fan motor.
Causes
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
terminals on indoor
pcb is well
Pull out the term inals on
the indoor mainboard and
reinsert them.
Turn off power switch,and pull out the fan motor.
Measure the resistances between balck line (0V)and white
line(15V) ,balck line (0V)and red line(310V) of indoor fan motor .
The resistances range is
between 30K
Ω
with
2M
Ω
The indoor fan
motor is damaged
and need replace
NO
YES
NO
YES
the ind oor pcb is dam aged
and need replace