Panasonic Urban Multi MX1R Series Service Manual page 617

Typical Wiring Mistakes
The indoor-to-
outdoor terminal of
outdoor unit 1 and
the outdoor-to-
outdoor terminal of
outdoor unit 2 are
connected
The indoor-to-
outdoor terminals
of outdoor units 1
and 2 are
connected
596
Indoor unit 1 Normal
Indoor unit 2 Normal
Indoor unit 3
UH malfunction
Indoor unit 4
Indoor unit 1
Indoor unit 2
UH malfunction
Indoor unit 3
Indoor unit 4
PACD011001C2
Appendix