Troubleshooting by Error Code SiAF332111E
324 Part 6 Service Diagnosis
5.67 System Not Set Yet
Applicable
Models
All indoor unit models
All outdoor unit models
Error Code UF
Method of Error
Detection
On check operation, the number of indoor units in terms of transmission is not corresponding to
that of indoor units that have made changes in temperature.
Error Decision
Conditions
The error is determined as soon as the abnormality aforementioned is detected through
checking the system for any erroneous connection of units on the check operation.
Supposed
Causes
Improper connection of transmission wiring between indoor-outdoor units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
Troubleshooting RXQ4/5AR
Caution
Is indoor-
outdoor unit
transmission wiring
normal?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
After fixing incorrect wiring,
press and hold the RESET
(BS5) button on the outdoor
unit main PCB for 5 seconds.
∗ The unit will not run for up to
12 minutes.
YES
YES
NO
NO
Open the stop valves.
Replace the indoor unit PCB.
Normal
YES
NO
Are the stop valves
opened?
Is UF displayed again?
Perform the check operation
again and press the RESET
(BS5) button.
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