L8" Outdoor Unit: Inverter Current Abnormal - Daikin R-410A Service Manual

Troubleshooting by Indication on the Remote Controller

4.30 "L8" Outdoor Unit: Inverter Current Abnormal

L8
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Malfunction is detected by current flowing in the power transistor.
Malfunction
Detection
Malfunction
When overload in the compressor is detected.
Decision
Conditions
! Compressor overload
Supposed
! Compressor coil disconnected
Causes
! Defect of inverter PC board
Troubleshooting
144
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Output current check
The secondary current
of the inverter is
higher than 24.9A for
each phase.
NO
Compressor
inspection The
compressor's coil is
disconnected.
NO
Disconnect the the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
Inverter output
voltage check Inverter
output voltage
is not balanced
(Normal if within ±5V). Must
be measured when
frequency is stable.
YES
After turning on
again, "L8" blinks
again.
YES
YES
YES
NO
NO
SiBE39-402A
Compressor overload
Inspection of the compressor and
refrigerant system is required.
Replace the compressor.
Replace the inverter PC board.
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
(V3184)
Troubleshooting