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(TCC-L / AI-NET)
Check code name
AI-NET communication line error
Cause of operation
AI-NET communication line error
Can other indoor units
be controlled from AI-NET
central remote controller,
or is the operation status
of indoor unit the same?
Can the
indoor unit be
controlled from the main
remote controller?
Is the network
address changed by the main
remote controller?
Are remote controller
communication lines
(A, B) normal?
Correct communication line.
Correct connection of connectors.
Correct power line.
Turn on the main power supply.
Clear check code.
Eliminate noise, etc.
Check power transformer of the
network adaptor P.C. board (MCC-1401).
Failure Replace
Check central controller.
Failure Replace
Check indoor P.C. board.
Failure Replace
Did a block-out occur?
Is there any noise etc.?
Does the network adaptor
P.C. board LED (D01) turn on?
Is there no connection error
on the power line?
Is not main power supply
turned on?
Are AI-NET X and Y
communication lines normal?
Are connections of CN01,
CN02, and CN03 connectors
on network adaptor P.C. board
(MCC-1401) and CN309
and CN41 connectors on
indoor P.C. board normal?
Check connection of A, B terminal.
Correct communication line of remote controller.
Unavailable (Others are same.)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO NO
NO
NO
NO
NO
NO
NO
NO
NO