Daikin SkyAir RZR-TA Series Service Manual page 292

Troubleshooting by Error Codes
Troubleshooting
∗ The number of indoor units that may be connected to an individual outdoor unit system is
determined by the model of the outdoor unit.
286
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 (BS5) button 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
YES
NO
NO
NO
SiUS281811EA
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).
Part 6 Service Diagnosis