Toshiba RAV-SM304MUT-E Service Manual page 60

[C06 error] (1:1 model connection interface)
Are U3 and U4 communication lines normal?
Is connection of connector normal?
Are A and B communication lines normal?
Is there no connection error of power supply cable?
Is not the source power supply turned on?
Did a power failure occur?
Is the network address changed
from the wired remote controller?
Is there no noise source?
Can the other indoor units
be normally controlled from the central controller?
Or is the operation status of indoor unit reflected?
Can the indoor unit be normally controlled
from the wired remote controller?
Check the power supply transformer of
1:1 model connection interface (MCC-1440).
Defective → Replace
AMP Air Conditioning
YES
∗1
YES
∗1
In case of 1:1 model connection interface
1:1 model connection interface (MCC-1440) CN51 and indoor P.C. board CN050.
YES
NO
YES
NO
NO
NO
YES
YES
NO
Correct communication line.
NO
Correct connection of connector.
NO
Check connection of A and B terminal blocks.
Correct communication line of remote controller.
YES
NO
Turn on the source power supply.
YES
YES
YES
Uncontrolled
(Same to others)
Uncontrolled
Check indoor P.C. board (MCC-1402).
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Correct power wiring.
Clear the check code.
Eliminate noise, etc.
Check central controller.
Defect → Replace
Defect → Replace