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[97 error] (Central controller)
Correct communication line.
Correct connection of connector.
Correct power cable.
Turn on the source power supply.
Clear the check code.
Eliminate noise, etc.
NO
NO
NO
YES
YES
YES
YES
NO
NO
YES
Is X, Y communication line normal?
Is A, B communication line normal?
Is there no connection error of power line?
Is there no noise source, etc.?
Is not power of source power supply turned on?
Did a power failure occur?
NO
(Same as others)
Are connections between connectors
CN02, CN03 of network adapter P.C. board
and connectors CN309, CN41 of indoor P.C. board
(MCC-1402 or MCC-1403, normal?
Check connections of A, B terminal blocks.
Correct communication line of remote controller.
Check central controller.
Defect Replace
Check indoor P.C. board
(MCC-1402 or MCC-1403).
Defect Replace
Check network adapter P.C. board and power transformer.
Defect Replace
Is the network address changed
form remote controller?
Does network adapter P.C. board
LED (D01) go on?
Can handy remote controller control
normally other indoor units?
Can central remote controller
control normally other indoor units?
Is handling of central remote controller reflected
on the operation status of indoor unit?
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES