Toshiba RAV-HM301MUT-E Service Manual page 65

[C06 trouble] ("1:1 model" connection interface)
Are Uh (U3, U4) communication lines normal?
YES
Is connection of connector normal?
YES
Are A and B communication lines normal?
YES
Is the power supply wiring connected correctly?
YES
Is the power turned on?
YES
Did a power failure occur?
NO
Is the network address changed
from the wired remote controller?
NO
Is there a noise source?
NO
Can the other indoor units
be normally controlled from the central controller?
Or is the operation status of indoor unit reflected?
YES
Can the indoor unit be normally controlled
from the remote controller?
YES
Replace power supply transformer on
"1:1 model" connection interface (MCC-1440).
* 1
* 1
CN51 of "1:1 model" connection interface (TCC-LINK adapter) P.C. board (MCC-1440) and
CN050 of indoor P.C. board
NO
C
NO
Correct connection of connector.
NO
Check connection of A and B terminal blocks.
Correct communication line of remote controller.
NO
NO
YES
YES
YES
Uncontrolled
(Same to others)
Uncontrolled
Replace indoor P.C. board (MCC-1643).
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r o e r t c c o m m u n c i t a o i n n i l . e
Correct power wiring.
Turn on the power.
Clear the check code.
Eliminate noise, etc.
Replace central controller.