System Not Set - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E

4.48 System not Set

UF
Error Code
Applicable
All indoor units
Models
Method of Error On check operation, the number of indoor units in terms of transmission is not corresponding to that
Detection of indoor units that have made changes in temperature.
Error Decision The error is determined as soon as the abnormality aforementioned is detected through checking
Conditions the system for any erroneous connection of units on the check operation.
Supposed
Causes
Troubleshooting
Service Diagnosis
Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor
units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Are the stop valves
opened?
YES
Is the check
operation carried
out?
YES
Is indoor
- outdoor and
outdoor - outdoor unit
transmission wiring
normal?
YES
Perform test operation again
and press BS3.
Are there any other
errors?
YES
NO
Is indoor-
outdoor and outdoor-
NO
outdoor unit transmission
wiring normal?
NO
NO
NO
Troubleshooting by Error Code
Open stop valve.
YES
Press BS3 on outdoor unit
PCB for 5 seconds or longer.
∗ No operation for max. 12
minutes.
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
Replace the indoor unit PCB.
206