Daikin REYQ72, Руководство по обслуживанию

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Troubleshooting by Indication on the Remote Controller SiUS39-602
168 Troubleshooting
2.37
“
L9
”
Outdoor Unit: Inverter Start up Error
Remote
Controller
Display
L9
Applicable
Models REYQ72M, 96M
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 inverter PC board
Troubleshooting
Refer check 13 to P.213.
Caution
Be sure to turn off 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
±
10V)
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
NO
NO
Reset and restart.
NO
The difference
between high and low
pressure when starting
is above
29psi.
YES
YES
Check No. 13
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)