Refrigerant System Not Set, Incompatible Wiring/Piping - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting
3.35

Refrigerant System not set, Incompatible Wiring/Piping

UF UF UF UF
Remote Controller
Display
„ Improper connection of transmission wiring between indoor-outdoor unit and outdoor-outdoor unit
Supposed Causes
„ Failure to execute wiring check operation
„ Defect of indoor unit PC board
Troubleshooting
Wiring check 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.
378
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Wiring
NO
check operation
carried out?
YES
Is indoor - outdoor
NO
and outdoor - outdoor unit
transmission wiring
normal?
YES
Is indoor
-outdoor and outdoor-outdoor
unit transmission
wiring normal?
NO
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
PACD011001C2
YES
Replace indoor unit PC board.
After fixing incorrect wiring, push
and hold the RESET button on the
outdoor unit PC board for 5
seconds.
∗ The unit will not run for up to 12
minutes.
Wiring check may not have been
carried out successfully.
(VF061)