Symptom Check Defect Remedy
Fan motor doesn't
operate with
"Selector switch" set
at "Fan only"
1) Check PWB
connector CN1
1) Connector open CN1
1) Joint of connector CN1
3) Check
a. Current exceeds
rated one
b. Motor lead wire
2) Check
a. Fan capacitor
b. Power cord
c. Fan motor
4) Check fan motor
circuit
Fan motor operates
but supplies no air
when "Selector
switch" set at
"Fan only"
1) Check motor
rotating direction
2) Check if air is
delivered
2) Crack at solder part of CN1
1) Fan capacitor defective
2) Power supply voltage is too low
3) Fan motor defective
1) Fan motor breaking locked
1) Fan motor coil shorted
1) Motor lead wire burn out
2) Over solder
1) Change capacitor
2) Improve power supply
equipment
3) Change fan motor
1) Change fan motor
2) Change repair lead wire
1) Change fan motor
1) Change repair lead wire
2) Fan motor lead wire burn out
1) Dirty air filter
2) Fan screw or nut loose and only
motor rotating
1) Clean
2) Tighten up
Compressor starts
but stops soon
1) Check air filter
and fan elements
4) Rated current is
normal but
overload relay or
internal thermostat
cuts out
1) Voltage is low and over-current
runs, overload relay or internal
thermostat operates
2) Wiring for power supply
equipment too thin
1) Overload relay or internal
thermostat operates as fan is
not rotating
2) Overload relay or internal
thermostat operates as fan
nut is loose
1) Overload relay or internal
thermostat operates as outdoor
air temp. is too high
Overload relay or internal
thermostat defective
1) Improve the equipment
2) Improve the equipment
1) Change switch
check electric circuit
(fan)
2) Tighten up
1) Ventilate well for outdoor
exchanger, avoid sun
light, remove heat source
from around outdoor unit
Change overload relay or
compressor
3) Check the temp.
of air at condensor
2) Improper ventilation for outdoor
heat exchanger.
Overload relay or internal
thermostat operates as the temp.
of outdoor unit is too high
2) Clean the outdoor unit
Improve ventilation for
outlet port of outdoor
exchanger
1) Measure power
supply voltage
2) Motor rotating wrong
2) Change fan motor
To Next Page
Loading...
