Excessive Number Of Indoor Units - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting
3.33

Excessive Number of Indoor Units

UA UA UA UA
Remote Controller
Display
„ Excess of connected indoor units
Supposed Causes
„ 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 type 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
188
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
The total
of indoor units
displaying "UA" and indoor
units connected to the same
refrigerant system is
24 units or
less.
YES
Push and hold the RESET
button on the outdoor unit PC
board for 5 seconds.
Does a malfunction occur?
Are R22 and R407C
indoor units used together?
NO
NO
NO
YES
Troubleshooting Urban Multi "MX1, ME1 Series" Using R-22
PACD011001C2
There are too many indoor units within
the same refrigerant system.
Normal.
Use only R22 or R407C units.
Replace outdoor unit PC board (A1P).
(VF059)