12.10.3 Fault 1 - Overcurrent, Subcode S4 - Software-based overcurrent fault
Cause
There is too high a current in the motor cable. Its cause can be 1 of the following:
•
a sudden heavy load increase
•
a short circuit in the motor cables
•
the motor is not the correct type
Troubleshooting
•
Do a check of the loading.
•
Do a check of the motor.
•
Do a check of the cables and connections.
•
Make an identification run.
12.10.4 Fault 2 - Overvoltage, Subcode S1 - Hardware trip
Cause
The DC-link voltage is higher than the limits.
•
Too short a deceleration time
•
High overvoltage spikes in the supply
•
Start/Stop sequence too fast
Troubleshooting
•
Set the deceleration time longer.
•
Use the brake chopper or the brake resistor. They are available as options.
•
Activate the overvoltage controller.
•
Do a check of the input voltage.
12.10.5 Fault 2 - Overvoltage, Subcode S2 - Overvoltage control supervision
Cause
The DC-link voltage is higher than the limits.
•
Too short a deceleration time
•
High overvoltage spikes in the supply
•
Motor load is generative
•
Start/Stop sequence too fast
Troubleshooting
•
Set the deceleration time longer.
•
Use the brake chopper or the brake resistor. They are available as options.
•
Activate the overvoltage controller.
•
Do a check of the input voltage.
Specifications
Operating Guide | VACON® NX Inverters FI4-FI8
AQ299433367205en-000101 / DPD00908| 127
Danfoss A/S © 2019.07
Summary of Contents for VACON NX FI4
Page 1: ...Operating Guide VACON NX Inverters FI4 FI8...
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