Service Manual 277
Self-diagnosis function
Trouble shooting Flow
Fault diagnosis and Trouble shooting guide
52
Error Item
Error
Display No.
Major Error Occurrence Cause
Meaning
Communication error
(inverter PCB - main
PCB)
If failing to receive
inverter signal at main
PCB
• No connection of communication line
• Short or fusing of communication line
• Poor inverter PCB or main PCB
No
Check and connect the
communication line
Yes
Is connection of the
communication line between the inverter
PCB and the main
PCB normal?
No
Check or replace the main PCB
Yes
Is the main PCB normal?
Check or replace the inverter PCB.
Summary of Contents for multi V PLUS
Page 21: ...Service Manual 21 Indoor Unit Indoor Units ...
Page 74: ...74 Indoor Unit ...
Page 86: ...86 Indoor Unit ...
Page 142: ...142 Indoor Unit ...
Page 160: ...160 Indoor Unit ...
Page 179: ...Service Manual 179 Outdoor unit ...
Page 239: ...Service Manual 239 Wiring Diagrams 5 8 60Hz 220V Main Outdoor Unit 8HP 10HP 12HP ...
Page 245: ...Service Manual 245 Trouble shooting guide ...
Page 296: ...296 Trouble Shooting Guide ...
Page 297: ...Service Manual 297 Appendix ...
Page 303: ...Service Manual 303 Exploded View Replacement Parts List ...