Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 214

Troubleshooting by Error Code
Troubleshooting
∗ The number of indoor units that may be connected to an individual outdoor unit system is
201
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the outdoor unit
PCB replaced by the backup
PCB?
NO
Is the total number
of indoor units displaying
UA and indoor units connectable
to the same refrigerant system
within the permitted limit?
YES
Press RESET on the outdoor unit PCB
for 5 seconds.
Is any fault detected?
YES
Is the refrigerant type
of the indoor unit and outdoor unit
matched?
YES
determined by the model of the outdoor unit.
YES
NO
∗
NO
NO
SiUS331604E
Check the model name of the
outdoor unit PCB and then
replace the old one.
Too many indoor units under one
refrigerant system.
Normal
Match refrigerant type of indoor
unit and outdoor unit.
Replace the outdoor main PCB
(A1P).
Service Diagnosis