Danfoss VACON NX FI6 Operating Manual page 136

Operating Guide | VACON® NX Inverters FI4-FI8
Troubleshooting
Ask instructions from the local distributor.
12.10.42 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.
12.10.43 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.
12.10.44 Fault 9 - Undervoltage, Subcode S3 - Undervoltage control supervision
Cause
The DC-link voltage is lower than the limits.
136 | Danfoss A/S © 2019.07
Specifications
AQ299433367205en-000101 / DPD00908