Symptom Check Defect Remedy
Compressor operates
in cooling but fan
doesn't rotate
2) Check fan capacitor
1) Connector open CN1
1) Joint of connector CN1
Noise
Excessive vibration
and noise
Capacitor defective
1) Insulation unstable
Piping touches cabinet or other parts
2) Screw or nut loose causing
vibrating noise
2) Electric parts
4) Cabinet or parts set-screws
loosened
5) Fan touching
Change capacitor
Change fan motor
1) Secure
2) Secure
Replace
2) Repair or change
4) Tighten up
6) Secure
2) Cabinet screw loose
2) Tighten up
2) Metallic sound
1) Compressor
3) Piping touched
6) Insulation unstable
3) Repair
1) Change compressor
1) Fan cracked or deformed
Repair
1) Change fan
1) Check PWB
connector CN1
1) Vibrating noise
3) Noise created by
fan
Compressor mounts defective
Check noise source
3) Check fan motor
5) Adjust
Fan motor defective
Check mounting of
compressor
Symptom Check Defect Remedy
PWB ass'y does not
operate
2) Check transformer
(TR)
1) Fuse(FU1)open
1) Change fuse(FU1)(NR)
The room is not cool
enough or not cool
at all.
The compressor
does not turn off
2) Secondary voltage of
transformer (TR)
Check thermistor
(Refer to page 27)
2) Change PWB ass'y
Change thermistor
Defective compressor relay
Change relay or
Replace PWB ass'y
1) Check fuse(FU1)
Check thermistor
Check compressor
relay
Control circuit
2) Crack at solder part of CN1 2) Over solder
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