Daikin R71FUV1 Service Manual page 465

Si20-701_B
A
Disconnect
the outdoor-
outdoor unit
transmission wiring to
create the one-system
status, and then
check whether or
not the system
is normal.
NO
Does
a "UH" error
occur for all indoor
units in the system?
YES
Note:
∗1: Check the correct indoor-outdoor unit transmission
wiring and outdoor-outdoor unit transmission wiring
with the installation manual.
458
Troubleshooting by Remote Controller
YES
NO
Mount the DIII-
NET expander
adaptor.
Replace the
indoor unit PCB.
Replace the
outdoor unit PCB
(A1P).