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Troubleshooting
Si12-619A
232
Service Diagnosis
Troubleshooting
Check No.05
Refer to P.262
Check No.06
Refer to P.263
Check No.11
Refer to P.266
Correct.
Reconnect.
Replace the four-way valve
coil.
Replace the outdoor unit
PC board.
Reconnect in position.
Replace a defective
thermistor.
Refer to the refrigerant line
check procedure.
Replace the four-way valve
(defective or dust-clogged).
(R4717)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Four-way valve coil
disconnected (loose)?
YES
YES
NO
Functioning
NO
C
heck No.
11
Check the refrigerant line.
Malfunctioning
z
Water mixed
z
Shut-off valve defective
Harness out of connector?
NO
YES
Disconnect the
harness from
the connector.
Resistance between
harnesses about
1500 ohms?
Malfunctioning
Functioning
C
heck No.
05
Check the four-way valve
switching output.
YES
NO
Any thermistor disconnected?
Malfunctioning
Functioning
C
heck No.
06
Check the thermistors.
Check the continuity of the four-
way valve coil and harness.
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 ...