L9" Outdoor Unit: Inverter Start Up Error - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
L9
3.32 " " Outdoor Unit: Inverter Start up Error
L9
Remote
Controller
Display
Applicable
RZQ18~30PVJU
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
 Defect of compressor'
Supposed
 Pressure differential start
Causes
 Defect of outdoor unit P.C.B. (A1P)
Troubleshooting
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
The difference
between high and low
pressure when starting
is above
30psi.
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 P.C.B.
(A1P).
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
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