L9" Outside Unit: Inverter Start Up Error; Inverter Start Up Error - Daikin VRV - WII Service Manual

Troubleshooting by Indication on the Remote Controller
2.32 "L9" Outside Unit:
L9
Remote
Controller
Display
Applicable RWEYQ60, 72, 84MTJU
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
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
200

Inverter Start up Error

Defect of compressor
Pressure differential start
Defect of inverter PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
The difference
between high and low
pressure when starting
is above
29psi.
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 of
power supply ) Must be
measured when
frequency
is stable.
YES
After turning
on again, "L9" blinks
again.
YES
NO
NO
NO
SiUS30-604
Unsatisfactory pressure
equalization
Check refrigerant system.
Replace the inverter PC board
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
Troubleshooting
(V2814)