Toshiba RAV-GM901KRTP Series Service Manual page 52

8-2-4. 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 header units set in
2 remote controllers?
[E02 error]
Communication wires
between wired remote controller and
indoor unit connected properly?
NO
YES
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
NO
YES
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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-1696).
Defect → Replace
Correct a header unit/a follower unit.
(Remote controller address connector)
Check remote controller P.C. board.
Defect → Replace
Correct as a header unit and a follower unit.
Check remote controller P.C. board.
Defect → Replace
Correct communication wire.
Failure of wired remote controller tranmitter
→ Replace wired remote controller.