Toshiba RAV-SM563UT-E Service Manual page 99

[C06 error] (Central controller)
Is U3, U4 communication line normal?
Are connections between connectors
CN51 of connection interface P.C. board
and connectors CN51 of indoor P.C. board
normal?
Is A, B communication line normal?
Is there no connection error of power line?
Is not power of source power supply turned on?
Did a power failure occur?
Is there no noise source, etc.?
Can central remote controller
control normally other indoor units?
Is handling of central remote controller reflected
on the operation status of indoor unit?
Can handy remote controller control
normally other indoor units?
Check connection interface P.C. board.
Defect → Replace
YES
YES
YES
NO
NO
NO
NO
NO
(Same as others)
YES
YES
NO
NO
NO
Check connections of A, B terminal blocks.
Correct communication line of remote controller.
YES
YES
YES
YES
NO
Check indoor P.C. board (MCC-1402).
Defect → Replace
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Correct communication line.
Correct connection of connector.
Correct power cable.
Turn on the source power supply.
Clear the check code.
Eliminate noise, etc.
Check central controller.
Defect → Replace