L5" Outdoor Unit: Inverter Compressor Abnormal - R-410A - Daikin ALTHERMA HT Service Manual

Troubleshooting by Indication on the Remote Controller
3.41 "L5 " Outdoor Unit: Inverter Compressor Abnormal - 
R-410A
L5
Remote Control
Display
ER*Q 011~016*
Applicable
Models
Malfunction is detected from current flowing in the power transistor.
Method of
Malfunction
Detection
When an excessive current flows in the power transistor.
Malfunction
(Instantaneous overcurrent also causes activation.)
Decision
Conditions
 Defect of compressor coil (disconnected, defective insulation)
Supposed
 Compressor start-up malfunction (mechanical lock)
Causes
 Defect of inverter PC board (A2P)
 Overcurrent
Troubleshooting
Compressor inspection
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
182
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
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
YES
YES
YES
ESIE09-08B
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)
Troubleshooting