Negative Phase, Open Phase - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting
3.27

Negative Phase, Open Phase

U1 U1 U1 U1
Remote Controller
Display
„ Power supply negative phase
Supposed Causes
„ Power supply open phase
„ Defect of outdoor PC board A1P
Troubleshooting
370
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
There
is an open
YES
phase at the power supply
terminal section (TeS1) of
the outdoor unit.
NO
Operation
is normal if one place YES
of power supply line phase is
replaced.
NO
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
PACD011001C2
Fix the open phase. Requires
inspection of field power supply section.
Negative phase.
Disposal of the problem is completed
by phase replacement.
Replace outdoor unit PC board A1P.
(VF053)