Panasonic CU-8ME1XPK - Outdoor Unit: Inverter Instantaneous Over-Current

PACD011001C2 Troubleshooting (Inverter)
Troubleshooting Urban Multi “MX1R, ME1R Series” Using R-407C 383
5.2 Outdoor Unit: Inverter Instantaneous Over-Current
Remote Controller
Display
L5
L5L5
L5
Supposed Causes
„
Defect of compressor coil (disconnected, defective insulation)
„
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.
(VF064)
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.
Replace the compressor.
Compressor inspection.
Inspect according to the diagnosis
procedure for odd noises, vibration and
operating status of the compressor.
NO
Replace the inverter unit.
YES
YES
The compressor's
coil is disconnected or the
insulation is
defective.
NO
Disconnect the connection
between the compressor and
inverter.
After turning
on again, "L5" blinks again.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.