Danfoss VLT MCD 600 Operating Manual page 134

Operating Guide | VLT® Soft Starter MCD 600
12.2.35 Overvoltage
Cause
There has been a voltage surge on the mains. Causes can include problems with a transformer tap regulator of off-loading of a large
transformer load.
Troubleshooting
• Check the following parameters:
- Parameter 5-9 Overvoltage.
- Parameter 5-10 Overvoltage Delay.
- Parameter 6-7 Overvoltage.
12.2.36 Parameter Out of Range
Cause
This trip is not adjustable.
• A parameter value is outside the valid range. The LCP indicates the first invalid parameter.
• An error occurred loading data from the EEPROM to RAM when the LCP powered up.
• The parameter set or values in the LCP do not match the parameters in the soft starter.
• Load User Set has been selected but no saved file is available.
Troubleshooting
• Reset the fault. The soft starter loads the default settings.
• If the problem persists, contact the local distributor.
• There are no parameters related to this trip message.
12.2.37 Phase Sequence
Cause
The phase sequence on the soft starter mains terminals (L1, L2, L3) is not valid.
Troubleshooting
• Check the phase sequence on L1, L2, and L3, and ensure that the setting in parameter 5-18 Phase Sequence is suitable for the
installation.
• Check the following parameters:
- Parameter 5-18 Phase Sequence.
- Parameter 6-16 Phase Sequence.
12.2.38 Power Loss
Cause
This trip is not adjustable. The soft starter is not receiving mains supply on 1 or more phases.
134 | Danfoss A/S © 2018.10
Troubleshooting
AQ262141844215en-000202 / 175R1174