Daikin FXYBP20K7V1, Service Manual

Page: 172 / 193

SiE 00-07 Troubleshooting (Inverter)
Troubleshooting R-407C PLUS Series 161
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.