7
-2-4. Diagnostic Procedure for Each Check Code (Indoor Unit)
Check code
[E01 trouble]
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
Is one of two remote controllers
set as a header unit?
Is one of two remote controllers
set as a header unit?
Is the connector on the harness or
the harness from terminal block of
indoor unit connected correctly?
Check power connection of indoor unit.
(Turn on power again.)
Replace indoor P.C. board
(MCC-1643).
Correct as a header unit
and a follower unit.
Replace remote controller P.C. board.
Correct a header unit/a follower unit.
(Remote controller address connector)
Correct connection of connector.
Check circuit wiring.
Correct inter-unit cable
of remote controller
Replace remote controller P.C. board.
NO
YES
NO
YES
YES
YES
NO
YES
NO
NO
NO
NO
YES
YES
[E09 trouble]
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