Toshiba RAV-SM1603AT-E Service Manual page 109

[97 error] (Central controller)
Are X and Y communication lines normal?
YES
Are CN01, CN02 and CN03
of the network adapter P .C. board
(MCC-1401) and CN309 and CN41
connectors correctly connected?
YES
Are A and B communication lines normal?
YES
Is there no connection error of power supply wire?
NO
Is the main power supply electrified?
YES
Did a power failure occur?
NO
Is the network address changed
from the remote controller?
NO
Is there noise source, etc?
NO
Can other indoor units be correctly
controlled from central remote controller?
And is the operation status
of the indoor unit reflected?
YES
Does the network adapter P .C. board
LED (D01) go on?
YES
Check network adapter P .C. board
(MCC-1401) and transformer of power supply.
Defect → Replace
YES
YES
YES
YES
YES
Can indoor unit be normally controlled
from the remote controller?
– 109 –
NO
Correct communication line.
NO
Correct connection of connector.
NO
Check connection of A and B terminal blocks.
Correct communication line of remote controller.
Correct power supply wire.
NO
Turn on main power supply.
No
(Same to others)
NO
Check indoor P .C. board.
Clear the check code.
Eliminate noise, etc.
Check central controller.
Defect → Replace
NO
Defect → Replace