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Troubleshooting
Si12-619A
250
Service Diagnosis
Troubleshooting
Check No.07
Refer to P.264
Check No.09
Refer to P.265
Note1:
Refer to “1.3 Application of Silicon grease to a power transistor and a diode bridge” on P358.
Turn off the power and turn it on
again to get the system started.
Check the power transistor
and fin for looseness. If
they are found to be fit
tightly, replace the PCB or
the power transistor.
Replace the fan motor.
Correct the connectors and
fan motor leads.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
(R7107)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Error displayed again?
NO
Slightly dirty
Check No.09
Check the outdoor unit
fan or related.
Malfunctioning
Radiation fin dirty?
Too dirty
Functioning
Above
103˚C or 105˚C
(depending on the
model)?
NO
YES
Check the radiation fin
temperature.
C
heck No.
07
Check the installation condition.
Check if the silicon grease
applied properly on the
radiation fin. If not, apply it
(
∗
). (Note 1)
∗
Silicon grease
Part No.: 1172698
YES
Has PCB been
replaced?
NO
YES
C
heck No.
06
Check the thermistor resistance
value.
z
Fin thermistor
Summary of Contents for 3MKS50DVM
Page 13: ...Introduction Si12 619A xii ...
Page 131: ...Control Specification Si12 619A 118 Function and Control ...
Page 213: ...Instruction Si12 619A 200 Operation Manual ...
Page 283: ...Check Si12 619A 270 Service Diagnosis ...
Page 302: ...Si12 619A Outdoor Unit E Series 50 52 58 Class Removal Procedure 289 Step Procedure Points ...
Page 385: ...Wiring Diagrams Si12 619A 372 Appendix FTK X S50 60 71FVLT ...
Page 399: ...Si12 619A vi Index ...