L5" Indoor Unit: Inverter Compressor Abnormal - R-134A - Daikin ERSQ 011AAV1 Service Manual

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Troubleshooting by Indication on the Remote Controller
3.41 "L5 " Indoor Unit: Inverter Compressor Abnormal -
R-134a
L5
Remote Control
Display
Subcode 13
Applicable
All indoor units
Models
Method of
Malfunction is detected from current flowing in the power transistor.
Malfunction
Detection
Malfunction
When an excessive current flows in the power transistor.
Decision
(Instantaneous overcurrent also causes activation.)
Conditions
Supposed
Causes
Troubleshooting
Compressor inspection
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
180
Overcurrent immediate
Defect of compressor coil (disconnected, defective insulation)
Compressor start-up malfunction (mechanical lock)
Defect of inverter PC board [A4P (1
Be sure to turn off power switch before connect or disconnect connector, or
Caution
parts damage may be occurred.
The
compressor's coil is
YES
disconnected or the
insulation is
defective.
NO
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.
YES
(Normal if within ±5V Must be
measured when
frequency is stable.
NO
YES
There is instantenious
power drop.
NO
ø
ø
) or A5P (3
)]
Replace the compressor.
Replace the inverter PC Board assy [A4P (1ø) or A5P (3ø)].
Correct power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
ESIE09-08
Troubleshooting

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