Daikin REYQ-TA Series Service Manual page 274

Troubleshooting by Error Code
261
Diagnosis Flowchart-6
U7-06
Error code Sub code
(Manual address setting error for
slave 1, 2)
One of
outdoor unit
multi transmission wirings has
caused wiring disconnection in it
or been disconnected.
YES
Diagnosis Flowchart-7
U7-07
Error code Sub code
(Connection 4 or more outdoor units
to the same system)
4 or
more outdoor
units are connected using
the outdoor unit multi
transmission
wirings.
YES
Diagnosis Flowchart-8
U7-11
Error code Sub code
(Connection of excess indoor units
for test operation)
There
is an error in
the connection of
indoor-outdoor, indoor-indoor,
and outdoor multi
transmission
wirings.
NO
The
capacity to
connect indoor units
falls within the specified
range.
YES
NO
Replace the outdoor unit main
PCB (A1P).
Modify the outdoor unit multi
transmission wirings, and then
reset the power supply.
NO
Replace the outdoor unit main
PCB (A1P).
Modify the outdoor unit multi
transmission wirings, and then
reset the power supply.
YES
Rectify the error in the connection
of transmission wirings, and then
reset the power supply.
NO
Check the capacity to connect
indoor units.
Replace the outdoor unit main
PCB (A1P).
SiUS371614E
Service Diagnosis