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[97 error] (Central controller)
Correct communication line.
Correct connection of connector.
Check connection of A and B terminal blocks.
Correct communication line of remote controller.
Clear the check code.
Turn on main power supply.
Check central controller.
Defect → Replace
Check network adapter P.C. board
(MCC-1401) and transformer of power supply.
Defect → Replace
Check indoor P.C. board.
Defect → Replace
Eliminate noise, etc.
Correct power supply wire.
Is there no connection error of power supply wire?
Is the main power supply electrified?
Did a power failure occur?
Is there noise source, etc?
Are A and B communication lines normal?
Are X and Y communication lines normal?
Can indoor unit be normally controlled
from the remote controller?
Is the network address changed
from the remote controller?
Does the network adapter P.C. board
LED (D01) go on?
Are CN01, CN02 and CN03
of the network adapter P.C. board
(MCC-1401) and CN309 and CN41
connectors correctly connected?
Can other indoor units be correctly
controlled from central remote controller?
And is the operation status
of the indoor unit reflected?
No
(Same to others)
NO
YES
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES