L9" Outdoor Unit: Inverter Start Up Error - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.44 "L9 " Outdoor Unit: Inverter Start up Error
L9
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 overload in the compressor is detected during startup
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Defect of compressor
Pressure differential start
Defect of outdoor unit PC board (A2P)
Be sure to turn off power switch before connect or disconnect connector, or
Caution
parts damage may be occurred.
The
difference between
high and low pressure when
starting is above
0.2MPa.
YES
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode 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.
YES
After turning on
L9
again, " " blinks
again.
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
NO
Unsatisfactory pressure equalization
Check refrigerant system.
Replace the inverter PC board
assy (A2P).
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
(V2814)
183