SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 381
7.20 Inverter Current Abnormal
Remote Control
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
(V3184)
Caution
NO
YES
NO
NO
NO
YES
YES
YES
Be sure to turn off power switch before connect or disconnect connector,
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.
Compressor
inspection The
compressor's coil is
disconnected.
Disconnect 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.
After turning on
again, "L8" blinks
again.
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.
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