Daikin VRV - WII, Service Manual

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Troubleshooting by Indication on the Remote Controller SiUS30-604
226 Troubleshooting
2.49
“
UF
”
Refrigerant System not Set, Incompatible Wiring/
Piping
Remote
Controller
Display
UF
Applicable
Models All models of indoor units
RWEYQ60, 72, 84MTJU
Method of
Malfunction
Detection 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
Decision
Conditions 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.
Supposed
Causes
„
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
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.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2830)
Is
indoor - outside
and outside - outside unit
transmission wiring
normal?
Replace indoor unit PC board.
Test operation may not have
been carried out successfully.
After fixing incorrect wiring,
push and hold the RESET
button on the master outside
unit PC board for 5 seconds.
YES
NO
YES
NO
NO
YES
Is the
test operation
(Wiring check operation)
carried out?
Is indoor
-outside and outside-
outside unit transmission
wiring normal?
Open stop valve.
YES
NO
Are the stop
valves openned?
∗
The unit will not run for up to
12 minutes.