Uf" System Is Not Set Yet - Daikin VRVIII-S Service Manual

SiENBE34-703

3.47 "UF" System is not Set yet

UF
remote control
Display
Applicable
All models of indoor units
Models RXYSQ4~6P
Method of
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.
Malfunction
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
Supposed
! Improper connection of transmission wiring between indoor-outdoor units and outdoor-
Causes
! Failure to execute check operation
! Defect of indoor unit PC board
! Stop valve is left in closed
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
outdoor units
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Are the stop valves
opened?
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 control
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.
* The unit will not run for up to
12 minutes.
Wiring check operation may
not have been carried out
successfully.
(V2830)
179