Compressor Startup Abnormality - Daikin VRV RXYMQ-A Series Service Manual

Troubleshooting by Error Code

5.44 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
 Defective compressor
Causes
 Error in wire connections to compressor
 Large differential pressure before compressor startup
 Defective outdoor unit main PCB (RXYMQ4AVMK)
 Defective inverter PCB (RXYMQ4-6AYFK)
Troubleshooting
228
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 stagnated.
YES
(The unit is out of power
supply for more than 6
hours.)
NO
Is the
insulation
NO
resistance of the
compressor 100 k:
or more?
YES
Are the
YES
leads of the
compressor
disconnected?
NO
SiME332106E
Go to the next page.
(Startup failure in aging operation)
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 (M1C).
Connect the leads of the compressor.
Apply power, and then restart
operation.
Part 6 Service Diagnosis