Uf" Refrigerant System Not Set, Incompatible Wiring/Piping - Daikin VRV II RXYQ5MY1B Service Manual

Troubleshooting by Indication on the Remote Controller
2.51 "UF" Refrigerant System not Set, Incompatible Wiring/
Piping
UF
Remote
Controller
Display
Applicable
All models of indoor units
RXYQ5~48M
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
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.
234
Improper connection of transmission wiring between outdoor unit and outdoor unit outside
control adaptor
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 NO
valves openned?
YES
Is the
NO
test operation
(Wiring check operation)
carried out?
YES
Is
indoor - outdoor NO
and outdoor - outdoor unit
transmission wiring
normal?
YES
Is indoor
YES
-outdoor and outdoor-
outdoor unit transmission
wiring normal?
NO
SiE39-404
Open stop valve.
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.
(V2830)
Troubleshooting