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

Troubleshooting by Indication on the Remote Controller
3.45 "L9 " Outdoor Unit: Inverter Start up Error
L9
Remote Control
Display
ER*Q 011~016*
Applicable
Models
Malfunction is detected from current flowing in the power transistor.
Method of
Malfunction
Detection
When overload in the compressor is detected during startup
Malfunction
Decision
Conditions
 Defect of compressor
Supposed
 Pressure differential start
Causes
 Defect of outdoor unit PC board (A2P)
Troubleshooting
186
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
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
NO
NO
NO
ESIE09-08B
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)
Troubleshooting