SiEN12-710A
Troubleshooting
Service Diagnosis
143
4.24 Outdoor Unit PCB Abnormality or Signal Transmission
Circuit Abnormality
Remote Control
Display
U4
Method of
Malfunction
Detection
1. Detect within the programme of the microcomputer that the programme is operating
normally.
2. When indoor-outdoor unit signal transmission can not be performed for more than 15 sec.
3. Detection of the presence or absence of zero-cross signal.
Malfunction
Decision
Conditions
1. When the programme of the microcomputer is in bad running order.
2. When indoor-outdoor unit signal transmission can not be performed for more than 15 sec.
3. When zero-cross signal can not be detected for more than 10 sec.
Supposed
Causes
"
Display disabled due to power supply fault
"
Communication circuit fault in outdoor unit PCB
"
Out of control of microcomputer caused by external factors
!
Noise
!
Momentary voltage drop
!
Momentary power loss
"
Defective outdoor unit PCB
"
Defective thermal fuse in outdoor terminal board
Содержание 2MKS40FV1B
Страница 11: ...Introduction SiEN12 710A x ...
Страница 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Страница 17: ...Heat Pump SiEN12 710A 6 List of Functions ...
Страница 25: ...Heat Pump SiEN12 710A 14 Specifications ...
Страница 33: ...Printed Circuit Board Connector Wiring Diagram SiEN12 710A 22 Printed Circuit Board Connector Wiring Diagram ...
Страница 75: ...Instruction SiEN12 710A 64 Operation Manual 2 3 Names of Parts FTKS 25 35 D FTXS 25 35 E Indoor unit ...
Страница 111: ...Instruction SiEN12 710A 100 Operation Manual ...
Страница 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...
Страница 203: ...SiEN12 710A iv Index ...