L9" Compressor Inverter Start Up Error - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

SiBE26-701

4.31 "L9" Compressor Inverter Start up Error

L9
Remote
Controller
Display
Applicable RZQ
Models
Method of This malfunction code will be output if overcurrent occurs at the time of startup.
Malfunction
Detection
Malfunction When the startup control is failed.
When an overcurrent is passed to the inverter due to the malfunction of a compressor or
Decision
electrical system.
Conditions
Supposed
Causes
Troubleshooting
Power OFF
Troubleshooting
Defect of compressor
Pressure differential start
Defect of inverter PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the stop valve
open?
YES
Are wire
connections properly
made (according to the
Wiring Diagram)?
YES
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
NO
The insulation
resistance is low (i.e.,
not more than
100kΩ.)
NO
Check the power transistor on
the inverter PC board (A3P)
using a multiple tester.
NO
Does the
power transistor have any
abnormalities?
NO
Connect the compressor cable,
and then restart the operation.
A
Failure to open the stop valve
Faulty compressor connection
NO
NO
Check the compressor cable for
any disconnection or flaws.
YES
YES
Diagnosis by Remote Controller
Open the stop valve.
Rectify the wire
connections.
Replace the compressor
(M1C).
Replace the inverter PC
board (A3P).
The inverter is likely to
have got faulty due to
the malfunction of the
compressor.
After the completion of
replacement, be sure
to check the
compresssor.
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