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Troubleshooting
Do a check of the supply voltage, the fuses, and supply cable.
11.1.48 Fault 10 - Input line supervision, Subcode S2 - Phase supervision active front-end
Cause
Line sync fault. AFE is not able to synchronize to line after five trials.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
Check that input contactor closes.
Check all fuses.
Check that LCL filter is not broken.
Try to activate a longer sync pulse with AFEOptions1.B8.
11.1.49 Fault 10 - Input line supervision, Subcode S3 - Phase supervision active front end, Microgrid
Cause
Frequency exceeds the line frequency min/max limits. It is possible that the frequency limits are too tight compared to other gener-
ators.
Underfrequency appears if:
DC-link voltage is too low to produce defined output voltage, which activates undervoltage controller.
There is not enough power in the grid compared to power consumed by loads.
Overfrequency appears if:
Overvoltage control activates due to too high DC-link voltage.
There is too much power generation compared to consumers.
Troubleshooting
Check that DC-link voltage is in proper range.
Check that limiters, for example, Power and Current limits, are not activated.
11.1.50 Fault 11 - Output phase supervision, Subcode S1 - Common output phase supervision
Cause
The measurement of current tells that there is no current in 1 motor phase.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
Do a check of the motor cable and the motor.
11.1.51 Fault 11 - Output phase supervision, Subcode S2 - Additional closed loop control output
phase fault
Cause
The measurement of current tells that there is no current in 1 motor phase.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
Do a check of the motor cable and the motor.
11.1.52 Fault 11 - Output phase supervision, Subcode S3 - Additional open loop control output
phase fault during start DC brake
Cause
The measurement of current tells that there is no current in 1 motor phase.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
Do a check of the motor cable and the motor.
AB296635287482en-000301 / DPD00903 | 335
Danfoss A/S © 2023.02
Fault Tracing
VACON® NX All-in-One
Application Guide
Summary of Contents for VACON NX
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