Outdoor Unit: Inverter Instantaneous Over-Current - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
5.2 Outdoor Unit:
L5 L5 L5 L5
Remote Controller
Display
„ Defect of compressor coil (disconnected, defective insulation)
Supposed Causes
„ Compressor start-up malfunction (mechanical lock)
„ Defect of inverter unit
Troubleshooting
Compressor inspection
∗ If inverter output voltage is measured by tester, the displayed voltage is higher than actual voltage.
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
Inverter Instantaneous Over-Current
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
The compressor's
coil is disconnected or the
insulation is
defective.
NO
Disconnect the connection
between the compressor and
inverter.
Inverter
output voltage
check
Inverter output voltage
is not balanced.
(Normal if within, ±8 V [3φ,
380~415V]) (Note) Must be
measured when
frequency
is stable.
NO
After turning
on again, "L5" blinks again.
YES
YES
Troubleshooting (Inverter)
Replace the compressor.
Replace the inverter unit.
Compressor inspection.
Inspect according to the diagnosis
procedure for odd noises, vibration and
operating status of the compressor.
(VF064)
383