Ai-Net Communication Line Error - Toshiba Super MMU-AP0091H Service Manual

Check code name
[–] / [97]
(d07 / AI-NET)
Are AI-NET X and Y
communication lines normal?
YES
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?
YES
Are remote controller
communication lines
(A, B) normal?
YES
Is there no connection error
of power line?
NO
Is not main power supply
turned on?
NO
Did a block-out occur?
NO
Is the network
address changed by main
remote controller?
NO
Is there no noise etc.?
NO
Can be other indoor units
normally controlled from
AI-NET central remote controller,
or is the operation status
of indoor unit reflected?
YES
Does the network adaptor
P.C. board LED (D01) turn on?
YES
Check code name

AI-NET communication line error

NO
NO
NO
YES
YES
YES
YES
YES
Unavailable (Others are same.)
Can be the
NO
indoor unit normally
controlled from the main
remote controller?
YES
AI-NET communication line error
Correct communication line.
Correct connection of connectors.
Check connection of A, B terminal.
Correct communication line of remote controller.
Turn on the main power supply.
NO
Check indoor P.C. board.
Check power transformer of the
network adaptor P.C. board (MCC-1401).
204
Cause of operation
Correct power line.
Clear check code.
Eliminate noise, etc.
Check central controller.
Failure Replace
Failure Replace
Failure Replace