System Is Not Set Yet - Daikin RMXS-L Series Service Manual

SiUS181631EA

7.31 System is not Set yet

UF
Error Code
Method of Error 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.
Detection
Error Decision The malfunction is determined as soon as the abnormality aforementioned is detected through
Conditions checking the system for any erroneous connection of units on the check operation.
Supposed
Causes
Troubleshooting
Note: Wiring check operation may not be successful if carried out after the outdoor unit has been off for
more than 12 hours, or if it is not carried out after running all connected indoor units in the fan mode
for at least an hour.
Troubleshooting
Improper connection of transmission wiring between indoor unit - outdoor unit
Failure to execute check operation
Defective indoor unit PCB
Stop valve is left closed
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
NO
Are the stop
valves opened?
YES
Is the
NO
check operation
carried out?
YES
Is the
NO
transmission wiring
normal?
YES
Open the stop valve (s).
YES
Is the transmission
Replace the indoor unit PCB
wiring normal?
(control PCB).
NO
∗ The unit does not run for up
∗ The unit does not run for up
Wiring check operation may
not have been carried out
successfully.
Troubleshooting for Outdoor Unit
After fixing incorrect wiring,
push and hold the RESET
button (BS5) on the service
PCB (A2P) for 5 seconds.
to 12 minutes.
After fixing incorrect wiring,
push and hold the RESET
button (BS5) on the service
PCB (A2P) for 5 seconds.
to 12 minutes.
(R22107)
261