Uf" Refrigerant System Not Set, Incompatible Wiring/Piping - Daikin VRV - WII Service Manual

Troubleshooting by Indication on the Remote Controller
2.49 "UF"
Refrigerant System not Set, Incompatible Wiring/
Piping
UF
Remote
Controller
Display
Applicable All models of indoor units
RWEYQ60, 72, 84MTJU
Models
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
checking the system for any erroneous connection of units on the check operation.
Decision
Conditions
Supposed
Causes
Troubleshooting
Note: Test operation may not be successful if carried out after the outside 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.
226
Improper connection of transmission wiring between outside unit and external control adaptor
for outdoor unit.
Failure to execute wiring check operation
Defect of indoor unit PC board
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 - outside
and outside - outside unit
transmission wiring
normal?
YES
NO
Is indoor
-outside and outside-
NO
outside unit transmission
wiring normal?
NO
NO
SiUS30-604
Open stop valve.
YES
Replace indoor unit PC board.
After fixing incorrect wiring,
push and hold the RESET
button on the master outside
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)