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Troubleshooting
Si12-619A
258
Service Diagnosis
5.28
Signal Transmission Error (on Outdoor Unit PCB)
Remote
Controller
Display
U7
Outdoor Unit LED
Display
A
5
1
1
2
4
3
4
4
4
Method of
Malfunction
Detection
Communication error between microcomputer mounted on the main PCB and PM1.
Malfunction
Decision
Conditions
When the data sent from the PM1 can not be received successively for 9 sec.
The abnormality is determined if the above fault conditions occurs once
Fault counter is reset when the data from the PM1 can be successfully received.
Supposed
Causes
Defective outdoor unit PCB
Troubleshooting
Replace the outdoor unit
PCB.
The cause can be an
external factor other than
the malfunction.
Monitor in long term.
(R5152)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Error again?
NO
YES
Turn the power off and turn it on
again.
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 ...