Inverter Compressor Startup Error - Daikin VRV-WIII RWEYQ72PTJU Service Manual

Troubleshooting by Indication on the Remote Controller

3.32 Inverter Compressor Startup Error

L9
Error Code
Applicable RWEYQ72P, 84P
Models
Method of Error
Detect the failure based on the signal waveform of the compressor.
Detection
Error Decision
Starting the compressor does not complete.
Conditions
 Stop valve is not opened
Supposed
 Defective compressor
Causes
 Defective compressor connection
 Large pressure difference before startup the compressor
 Defective inverter PCB
Troubleshooting
206
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is it the
initial time to start after
installation?
YES
Is a right
amount of refrigerant
charged?
YES
Is
the stop valve
opened?
YES
Refrigerant is
melting in refrigerant
oil. (The unit is out of power
supply for more than
6 hours.)
NO
Is the
insulation
resistance of the
compressor more
than 100kΩ?
YES
Are the
compressor lead
wires disconnected?
NO
NO
NO
NO
YES
NO
YES
SiUS30-1301
Go on to the next page.
(Starting error due to aged
operation.)
Charge a right amount of
refrigerant.
Open the stop valve.
Cancel the melting state of
refrigerant.
Cancel the melting state of
refrigerant.
Fix the compressor lead wire.
Correct the wiring then
supply the power to restart.
Service Diagnosis