Inverter Current Abnormal - Daikin E-Series Service Manual

SiAU18-715
7.20

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
Supposed
Causes
Troubleshooting
Troubleshooting
Compressor overload
Compressor coil disconnected
Defect of outdoor unit PCB (A1P)
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, 260
sec. 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
Troubleshooting for Outdoor Unit
Compressor overload
Inspection of the
compressor and
refrigerant system is
required.
Replace the compressor.
Replace outdoor unit PC
board (A1P).
Reset and restart.
Compressor inspection
Inspect according to the
diagnosis procedure for
odd noises, vibration and
operating status of the
compressor.
(Q0569)
379