Service Manual

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10-2-4. Diagnostic Procedure for Each Check Code (Indoor Unit)
Check code
[E01 error]
Is inter-unit cable of A and B normal?
Is group control operation?
Is power of all indoor units turned on?
Is power supplied to remote controller?
AB terminal: Approx. DC18V
Are 2 remote controllers set
without master unit?
Are 2 master units set in
2 remote controllers?
Is there no disconnection or
contact error of connector on harness
from terminal block of indoor unit?
Check power connection of indoor unit.
(Turn on power again.)
Check indoor P.C. board (MCC-1570).
Defect → Replace
Check remote controller P.C. board.
Defect → Replace
Correct as a master unit
and a follower unit.
Check remote controller P.C. board.
Defect → Replace
Correct a master unit/a follower unit.
(Remote controller address connector)
Correct connection of connector.
Check circuit wiring.
Correct inter-unit cable
of remote controller
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
[E09 error]