Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload - Daikin VRV R-407C PLUS Series Service Manual

SiE 00-07
5.3

Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload

L8
Remote Controller
Display
Supposed Causes
Troubleshooting
Output current check
Troubleshooting R-407C PLUS Series
Compressor overload
Compressor coil disconnected
Defect of inverter unit
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 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)
161