L9" Outdoor Unit: Inverter Start Up Error - Daikin ERQ Service Manual

Troubleshooting by Indication on the Remote Controller
L9
3.35 " " Outdoor Unit: Inverter Start up Error
L9
Remote
Controller
Display
Applicable
ERQ 125 ~ 200 A7V1
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
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode ON by
service mode.
204
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,
Caution or parts damage may be occurred.
The difference
between high and low
NO
pressure when starting
is above
0.2MPa.
YES
Inverter
output
voltage check
Inverter output voltage
NO
is not balanced.
(Normal if within ±5V) Must
be measured when
frequency
is stable.
YES
After turning NO
9
on again, " " blinks
again.
YES
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.
: http://splitoff.ru/tehn-doc.html
ESIE09-05
(V2814)
Troubleshooting