Compressor Startup Abnormality - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

Troubleshooting by Error Code

3.56 Compressor Startup Abnormality

Applicable
All outdoor unit models
Models
L9
Error Code
Method of Error
Detect error according to the signal waveform of compressor.
Detection
Error Decision
When compressor startup operation has not been completed.
Conditions
Supposed
 The stop valve is not opened
Causes  Defective compressor
 Error in wire connections to compressor
 Large differential pressure before compressor startup
 Defective inverter PCB
Troubleshooting
323
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Startup for
NO
the first time after
installation?
YES
Is a proper
NO
amount of refrigerant
charged?
YES
NO
Is the stop valve
open?
YES
Refrigerant is
YES
stagnated. (The unit is out
of power supply for more
than 6 hours.)
NO
Is the
insulation
NO
resistance of the relevant
compressor 100 kΩ
or more?
YES
Are the
leads of the YES
compressor
disconnected?
NO
SiUS341802EC
A
Go to the next page.
Charge a proper amount of
refrigerant.
Open the stop valve.
Solve the refrigerant stagnation.
(Power should be supplied for more
than 6 hours.)
Replace the compressor.
Connect the leads of the compressor.
Apply power, and then restart
operation.
Part 6 Service Diagnosis