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Troubleshooting
Si12-619A
224
Service Diagnosis
5.11
Outdoor Unit PCB Abnormality
Remote
Controller
Display
E1
Outdoor Unit LED
Display
A
5
1
4
2
4
3
4
4
1
Method of
Malfunction
Detection
Detect within the programme of the microcomputer that the programme is in normal running
order.
Malfunction
Decision
Conditions
When the programme of the microcomputer is in abnormal running order.
Supposed
Causes
Out of control of microcomputer caused by external factors
z
Noise
z
Momentary fall of voltage
z
Momentary power loss
Defective outdoor unit PCB
Troubleshooting
Replace the outdoor unit
PCB.
Carry out grounding work.
The cause can be external
factors other than
malfunction.
Investigate the cause of
noise.
(R5142)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Power on again
YES
Error again?
NO
Check to see that the machine is
grounded.
NO
Grounded?
YES
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 ...