Uf" System Is Not Set Yet - Daikin VRV III-S RXYMQ36 48PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
UF
3.46 " " System is not Set yet
UF
Remote
Controller
Display
Applicable All indoor unit models
Models RXYMQ36 · 48PVJU
Method of
On check operation, the number of indoor units in terms of transmission is not corresponding to that
Malfunction of indoor units that have made changes in temperature.
Detection
Malfunction
The malfunction is determined as soon as the abnormality aforementioned is detected through
Decision checking the system for any erroneous connection of units on the check operation.
Conditions
 Improper connection of transmission wiring between indoor-outdoor units
Supposed
 Failure to execute check operation
Causes
 Defect of indoor unit PCB
 Stop valve is left in closed position.
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Are the stop
valves opened?
YES
Is the
check operation
carried out?
YES
Is
indoor - outdoor
unit transmission wiring
normal?
YES
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.
194
NO
Is indoor-
NO
outdoor unit transmission
wiring normal?
NO
NO
Open stop valve.
YES
Replace the indoor unit PCB.
After fixing incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PCB for 5 seconds.
* The unit will not run for up to
12 minutes.
Wiring check operation may not
have been carried out
successfully.
SiUS34-907
Troubleshooting