Toshiba CEILING TYPE User Manual

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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 header unit?

Are 2 header 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-1402).

Defect 

→ Replace

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 a header 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