Uf" System Is Not Set Yet - Daikin RXYQ72 Serivce Manual

SiUS39-601
2.53 "UF"
System is not Set yet
UF
Remote
Controller
Display
Applicable All indoor units models
RXYQ72M, 96M
Models
Method of The number of indoor units in terms of data transmission becomes mismatched to that of indoor
units with changes in temperature on operation for checks.
Malfunction
Detection
Malfunction The malfunction is determined as soon as the abnormality aforementioned is detected through
checking the system for any erroneous connection of units on the check operation.
Decision
Conditions
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 - outdoor unit and outdoor unit -
external control adaptor for outdoor unit
Failure to execute check operation
Defect of indoor unit PC board
Stop valve is left in closed
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Are the stop
valves openned?
YES
Is the
check operation
carried out?
YES
Is
indoor - outdoor
and outdoor - outdoor unit
transmission wiring
normal?
YES
Troubleshooting by Indication on the Remote Controller
NO
Is indoor
-outdoor and outdoor-
NO
outdoor unit transmission
wiring normal?
NO
NO
Open stop valve.
YES
Replace indoor unit PC board.
After fixing incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
(Wiring check operation)
∗ The unit will not run for up to
12 minutes.
Wiring check operation may
not have been carried out
successfully.
(V2830)
191