ESIE09-08A Troubleshooting by Indication on the Remote Controller
Troubleshooting 193
3.42 “L5 ” Indoor Unit: Inverter Compressor Abnormal -
R-134a
Remote Control
Display
L5
Subcode 13
Applicable Models All indoor units
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision Conditions
When an excessive current flows in the power transistor.
(Instantaneous overcurrent also causes activation.)
Supposed Causes Overcurrent immediate
Defect of compressor coil (disconnected, defective insulation)
Compressor start-up malfunction (mechanical lock)
Defect of inverter PC board [A4P (1ø) or A5P (3ø)]
Troubleshooting
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
Caution
Be sure to turn o power switch before connect or disconnect connector, or
parts damage may be occurred.
Compressor inspection
Inverter
output voltage
check Inverter output
voltage is not balanced.
(Normal if within ±5V 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 PC Board assy [A4P (1ø) or A5P (3ø)].
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. Make the power
transistor check mode setting
ON by service mode.
There is instantenious
power drop.
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