Daikin E Series, Руководство по обслуживанию

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SiAU18-715 Troubleshooting for Outdoor Unit
Troubleshooting 379
7.20 Inverter Current Abnormal
Remote
Controller
Display
L8
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision
Conditions When overload in the compressor is detected.
Supposed
Causes
„
Compressor overload
„
Compressor coil disconnected
„
Defect of outdoor unit PCB (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Disconnect the the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
The
secondary
current of the inverter
is higher than 24.9A, 260
sec. for each
phase.
Compressor
inspection The
compressor's coil is
disconnected.
After turning
on again, "L8" blinks
again.
Inverter
output
voltage check
Inverter output voltage
is not balanced (Normal if
within
±
5V). Must be
measured when
frequency is
stable.
Output current check
Compressor inspection
Inspect according to the
diagnosis procedure for
odd noises, vibration and
operating status of the
compressor.
(Q0569)
Compressor overload
Inspection of the
compressor and
refrigerant system is
required.
YES
Reset and restart.
NO
Replace outdoor unit PC
board (A1P).
NO
NO
Replace the compressor.
YES
NO
YES
YES