Toshiba RAV-SM304SDT-TR Service Manual page 88

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 there no disconnection or
contact error of connector on harness
from terminal block of indoor unit?
NO
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?
[E09 error]
Are 2 master units set in
2 remote controllers?
NO
YES
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
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Correct inter-unit cable
of remote controller
Correct connection of connector.
Check circuit wiring.
Check power connection of indoor unit.
(Turn on power again.)
Check indoor P.C. board (MCC-1570).
Defect → Replace
Correct a master unit/a follower unit.
(Remote controller address connector)
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