Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
5.3 Outdoor Unit:
L8
Remote Controller
Display
„ Compressor overload
Supposed Causes
„ Compressor coil disconnected
„ Defect of inverter unit
Troubleshooting
Output current check
Troubleshooting UM Combination "MA1R Series" Using R-407C
Inverter Thermostat Sensor, Compressor Overload
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
The secondary
current of the inverter is
higher than 27.5A
for each phase.
NO
Compressor inspection.
The compressor's coil is
disconnected.
NO
Disconnect the connection
between the compressor and
inverter.
Inverter
output voltage
check
Inverter output voltage
is not balanced.
(Normal if within ±8V)
(Note) Must be
measured when
frequency
is stable.
YES
After turning on again,
"L8" blinks again.
YES
YES
YES
NO
NO
Troubleshooting (Inverter)
Compressor overload.
Inspection of the compressor and
refrigerant system is required.
Replace the compressor.
Replace the inverter unit.
Reset and restart.
Compressor inspection.
Inspect according to the diagnosis
procedure for odd noises, vibration and
operating status of the compressor.
(VF065)
537