Troubleshooting (Inverter) Si33-105
196 Troubleshooting R407C PLUS Series Heat Recovery System
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
instantenious power
drop.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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