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Is inter-unit cable of A and B normal?
Is there no disconnection
or contact error of connector on harness
from terminal block of indoor unit?
Is group control operation?
Is power of all indoor units turned on?
Is power supplied to remote controller?
AB terminal: Approx. DC18V
Are two remote controllers
set without master unit?
Are two remote controllers
set without master unit?
Correct inter-unit cable of remote controller.
Correct connection of connector.
Check circuit cables.
Check power connection of indoor unit.
(Turn on power again.)
Check indoor P.C. board (MCC-1402).
Defect Replace
Correct as a master unit/a sub unit
(Remote controller address connector)
Check remote controller P.C. board.
Defect Replace
Correct as a master unit/a sub unit
(Remote controller address connector)
Check remote controller P.C. board.
Defect Replace
NO
YES
NO
NO
NO
YES
YES
YES
NO
YES
YES
YES
NO
NO
10-4. Troubleshooting Procedure for Each Check Code
10-4-1. Check Code
[E01 error]
[E09 error]