Diagnosis Procedure For Each Check Code - Toshiba Super MMU-AP0091H Service Manual

9-5. Diagnosis Procedure for Each Check Code

Check code
[E01] / [–]
(d07 / AI-NET)
Is the inter-unit cable of
remote controllers (A/B) normal?
Is there no disconnection or
connector contact error on harness out
of terminal block of indoor unit?
NO
Is a group control operation?
Is power of each indoor unit turned on?
Is power applied to remote controller?
AB terminals: Approx. DC18V
Is setup of two remote controllers
without main remote controller?
Check code name
Communication error between
indoor and remote controller
(Detected at remote controller side)
NO
YES
YES
NO
YES
NO
YES
NO
YES
YES
NO
1. Remote controller inter-unit cable error
2. Indoor power error
3. Indoor P.C. board error
4. Remote controller address setup error
5. Remote controller P.C. board error
Check power connection status of
indoor unit. (Turn on power again.)
Change one to main/other to sub.
(Remote controller address connector)
Check remote controller P.C. board.
149
Cause of operation
Correct inter-unit cable of
remote controller.
Correct connector connection
and check circuit cabling.
Check indoor P.C. board.
Defect Replace
Defect Replace