Panasonic CU-8ME1XPK - Excessive Number of Indoor Units

Troubleshooting PACD011001C2
376 Troubleshooting Urban Multi “MX1R, ME1R Series” Using R-407C
3.33 Excessive Number of Indoor Units
Remote Controller
Display
UA
UAUA
UA
Supposed Causes
„
Excess of connected indoor units
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
The number of indoor units that can be connected to a single outdoor unit system depends on the model of
outdoor unit.
CU-5MX : Max. 8 units
CU-8MX : Max. 13 units
CU-10MX : Max. 16 units
CU-8ME : Max. 13 units
CU-10ME : Max. 16 units
(VF059)
The total
of indoor units
displaying "UA" and indoor
units connected to the same
refrigerant system is
24 units or
less.
Replace outdoor unit PC board (A1P).
Use only R22 or R407C units.
NO
NO
Normal.
NO
There are too many indoor units within
the same refrigerant system.
Push and hold the RESET
button on the outdoor unit PC
board for 5 seconds.
YES
YES
YESAre R22 and R407C
indoor units used together?
Does a malfunction
occur again?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.