Danfoss VACON NX All-in-One Application Manual page 334

VACON® NX All-in-One
Application Guide
11.1.43 Fault 8 - System fault, Subcode S70 - False fault activated
Cause
Fault in application.
Troubleshooting
Ask instructions from the local distributor.
11.1.44 Fault 9 - Undervoltage, Subcode S1 - DC-link too low during run
Cause
The DC-link voltage is lower than the limits.
• Too low a supply voltage
• AC drive internal fault
• A defective input fuse
• The external charge switch is not closed.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
• If there is a temporary supply voltage break, reset the fault and start the drive again.
• Do a check of the supply voltage. If the supply voltage is sufficient, there is an internal fault.
• Ask instructions from the local distributor.
11.1.45 Fault 9 - Undervoltage, Subcode S2 - No data from power unit
Cause
The DC-link voltage is lower than the limits.
• Too low a supply voltage
• AC drive internal fault
• a defective input fuse
• the external charge switch is not closed.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
• If there is a temporary supply voltage break, reset the fault and start the drive again.
• Do a check of the supply voltage. If the supply voltage is sufficient, there is an internal fault.
• Ask instructions from the local distributor.
11.1.46 Fault 9 - Undervoltage, Subcode S3 - Undervoltage control supervision
Cause
The DC-link voltage is lower than the limits.
• Too low a supply voltage
• AC drive internal fault
• A defective input fuse
• The external charge switch is not closed.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
• If there is a temporary supply voltage break, reset the fault and start the drive again.
• Do a check of the supply voltage. If the supply voltage is sufficient, there is an internal fault.
• Ask instructions from the local distributor.
11.1.47 Fault 10 - Input line supervision, Subcode S1 - Phase supervision diode supply
Cause
The input line phase is missing.
It is possible to set different responses in the application for this fault. See parameter group Protections.
334 | Danfoss A/S © 2023.02
Fault Tracing
AB296635287482en-000301 / DPD00903