user manual

– 68 –
Correct communication line.
Correct connection of connector.
Correct power cable.
Turn on the source power supply.
Clear the check code.
Eliminate noise, etc.
NO
(Same as others)
Check connections of A, B terminal blocks.
Correct communication line of remote controller.
Check indoor P.C. board (MCC-1402).
Defect → Replace
Check connection interface P.C. board.
Defect → Replace
Check central controller.
Defect → Replace
Is U3, U4 communication line normal?
Is A, B communication line normal?
Did a power failure occur?
Is there no noise source, etc.?
Is there no connection error of power line?
Is not power of source power supply turned on?
Can handy remote controller
control normally other indoor units?
Are connections between connectors
CN51 of connection interface P.C. board and
connectors CN51 of indoor P.C. board normal?
Can central remote controller
control normally other indoor units?
Is handling of central remote controller reflected
on the operation status of indoor unit?
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
YES
YES
[C06 error] (Central controller)