L5" Outdoor Unit: Inverter Compressor Abnormal - R-410A - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.40 "L5 " Outdoor Unit: Inverter Compressor Abnormal -
R-410A
L5
Remote Control
Display
Applicable
ER*Q 011~016*
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.
Troubleshooting
Defect of compressor coil (disconnected, defective insulation)
Compressor start-up malfunction (mechanical lock)
Defect of inverter PC board (A2P)
Overcurrent
Caution
The
compressor's coil is
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.
(Normal if within 5V Must be
measured when
frequency is
stable.
NO
There is instantaneous
power drop
NO
Troubleshooting by Indication on the Remote Controller
YES
YES
YES
Replace the compressor.
Replace the inverter PC board
assembly (A2P).
Correct power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
(V2812)
179