Panasonic CU-8ME1XPK - Malfunction of System, Refrigerant System Address Undefined

PACD011001C2 Troubleshooting
Troubleshooting Urban Multi “MX1R, ME1R Series” Using R-407C 379
3.36 Malfunction of System, Refrigerant System Address Undefined
Remote Controller
Display
UH
UHUH
UH
Supposed Causes
„
Improper connection of transmission wiring between indoor-outdoor unit and outdoor-outdoor unit
„
Defect of indoor unit PC board
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
(VF062)
NO
YES
YES
After fixing incorrect wiring, push
and hold the RESET button on the
outdoor unit PC board for 5
seconds.
Normal.
NO
Is electricity
being introduce for
the first time after installation
or after an indoor or outdoor
unit PC board has
been replaced?
Is
indoor - outdoor and
outdoor - outdoor unit
transmission wiring
normal?
YES
Normal.
NO
Does a malfunction occur?
NO
Does
a "UH" malfunction occur for
all indoor units in
the system?
YES
NO
Does
a malfunction
occur even after 12
minutes elapses from the time
when electricity is introduced
to indoor and outdoor
units?
YES
Replace indoor unit PC board.
Replace outdoor unit PC board
(A1P).
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.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.