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

Troubleshooting (Inverter) PACD011001C2
536 Troubleshooting UM Combination “MA1R Series” Using R-407C
5.2 Outdoor Unit: Inverter Instantaneous Over-Current
Remote Controller
Display
L5
Supposed Causes
„
Defect of compressor coil (disconnected, defective insulation)
„
Compressor start-up malfunction (mechanical lock)
„
Defect of inverter unit
Troubleshooting
Compressor inspection
(VF064)
Inverter
output voltage
check
Inverter output voltage
is not balanced.
(Normal if within ±8V)
(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
Correct power supply.
YES
The compressor's
coil is disconnected or the
insulation is
defective.
NO
NO
Disconnect the connection
between the compressor and
inverter.
There is
instantaneous power
drop.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.