Daikin R407C PLUS - Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload

Si33-105 Troubleshooting (Inverter)
Troubleshooting R407C PLUS Series Heat Recovery System 197
5.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor
Overload
Remote
Controller
Display
L8
Supposed
Causes
!
Compressor overload
!
Compressor coil disconnected
!
Defect of inverter unit
Troubleshooting Output current check
(VF065)
Inverter
output voltage
check
Inverter output voltage
is not balanced.
(Normal if within ±8V)
(Note) Must be
measured when
frequency
is stable.
Compressor overload
Inspection of the compressor and
refrigerant system is required.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
NO
Replace the inverter unit.
YES
NO
Reset and restart.
NO
The
secondary
current of the inverter is
higher than 27.5A for
each phase.
Replace the compressor.
NO
YES
Compressor
inspection The
compressor's coil is
disconnected.
YES
YES
Disconnect the the connection
between the compressor and
inverter.
After
turning on again, "L8"
blinks again.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.