Daikin R42NUY2S - Page 436

Troubleshooting by Remote Controller Si20-701_B
429
YES
YES
YES
Is it a
multi outdoor unit
connection
system?
Is the
combination of
master unit and slave
unit correct?
NO
Replace the
outdoor unit main
PCB.
NO
NO
Change to a
correct
combination.
Replace the
outdoor unit main
PCB.
Correct the
combination of
indoor units with
"UA" displayed.
Replace the
indoor unit PCB.
A
B
Is
the type
of refrigerant
for the indoor units
with "UA" displayed
corresponding to that
for the outdoor
units?
YES
Does
the refrigerant
type of indoor and
outdoor unit
match?
NO
Matches the
refrigerant type
of indoor and
outdoor unit.