Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 221

SiUS331604E
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is
electricity
being introduced
for the first time after
installation or after an indoor
or outdoor unit PCB
has been
replaced?
NO
Is
indoor - outdoor
and outdoor - outdoor unit
transmission wiring
normal? (∗1)
YES
Press and hold the BS3
button on the outdoor unit
PCB for 5 seconds
Does an error occur?
YES
Disconnect the
outdoor-outdoor unit
transmission wiring to
create the one-system
status, and then check
whether or not the
system is normal.
NO
UH
Does a error
occur for all indoor
units in the system?
YES
∗1: Refer to installation manual for correct "indoor unit and outdoor unit connection
wiring" and "outdoor unit and outdoor unit connection wiring".
∗2: Automatic address refers to the automatic designated address of indoor unit and
outdoor unit when connected to the power after installation or wiring replacement
(with BS3 pressed for more than 4 seconds).
Does
an error
occur even after
12 minutes elapses
YES
from the time when
electricity is introduced
to indoor and
outdoor
units?
YES
NO
NO
YES
NO
Troubleshooting by Error Code
NO
Normal
After fixing incorrect wiring,
press and hold the BS3
button on the master outdoor
unit PCB for 5 seconds.
∗ The unit will not run for up to
12 minutes.
Normal
Mount the DIII-NET expander
adaptor.
Replace the indoor unit PCB.
Replace the outdoor main
PCB (A1P).
208