Uf" Refrigerant System Not Set, Incompatible Wiring/Piping - Daikin R-410A Service Manual

Troubleshooting by Indication on the Remote Controller
4.45 "UF" Refrigerant System not Set, Incompatible Wiring/
Piping
UF
Remote
Controller
Display
Applicable
AII indoor unit models
Models AII outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
! Improper connection of transmission wiring between outdoor unit and outdoor unit outside
Supposed
Causes
! Failure to execute wiring check operation
! Defect of indoor unit PC board
! Failure to open the stop valve
Troubleshooting
Note: Test 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.
164
control adaptor
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
test operation
(Wiring check operation)
carried out?
YES
Is
indoor - outdoor
and outdoor - outdoor unit
transmission wiring
normal?
YES
NO
Is indoor
-outdoor and outdoor-
NO
outdoor unit transmission
wiring normal?
NO
NO
SiBE39-402A
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.
Test operation may not have
been carried out successfully.
Troubleshooting
(V2830)