Daikin ALTHERMA HT ERSQ 014 V1 - L9 Outdoor Unit: Inverter Start up Error

Troubleshooting by Indication on the Remote Controller ESIE09-08A
196 Troubleshooting
3.45 “L9 ” Outdoor Unit: Inverter Start up Error
Remote Control
Display
L9
Applicable Models ER*Q 011~016*
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision Conditions
When overload in the compressor is detected during startup
Supposed Causes  Defect of compressor
 Pressure differential start
 Defect of outdoor unit PC board (A2P)
Troubleshooting
Caution
Be sure to turn o power switch before connect or disconnect connector, or
parts damage may be occurred.
Inverter
output voltage
check Inverter output
voltage is not balanced.
(Normal if within ±5V) Must be
measured when
frequency is stable.
Unsatisfactory pressure equalization
Check refrigerant system.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
YES
Replace the inverter PC board
assy (A2P).
NO
NO
Reset and restart.
NO
The
dierence between
high and low pressure when
starting is above
0.2MPa.
YES
YES
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode ON by
service mode.
After turning on
again, "
L9" blinks
again.
(V2814)