Daikin ERSQ 011AAV1, Service Manual

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ESIE09-08 Troubleshooting by Indication on the Remote Controller
Troubleshooting 179
3.40
“L5”
Outdoor Unit: Inverter Compressor Abnormal -
R-410A
Remote Control
Display
L5
Applicable
Models
ER*Q 011~016*
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
„
Defect of compressor coil (disconnected, defective insulation)
„ Compressor start-up malfunction (mechanical lock)
„ Defect of inverter PC board (A2P)
„ Overcurrent
Troubleshooting
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
(V2812)
Compressor inspection
Caution
Inverter
output voltage
check Inverter output
voltage is not balanced.
(Normal if within
±
5V Must be
measured when
frequency is
stable.
Replace the compressor.
NO
Replace the inverter PC board
assembly (A2P).
YES
Correct power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
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 instantaneous
power drop
YES
YES