L9" Outdoor Unit: Inverter Start Up Error - Daikin VRV III-S RXYMQ6PV4A Service Manual

SiME34-608
3.34 "L9" Outdoor Unit:
L9
Remote
Controller
Display
Applicable RXYMQ6P
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
Inverter Start up Error
Defect of compressor
Pressure differential start
Defect of outdoor unit PC board (A1P)
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
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 again, "L9" blinks
again.
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
NO
Unsatisfactory pressure
equalization
Check refrigerant system.
Replace outdoor unit PC board
(A1P).
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
(V2814)
167