Danfoss VLT MCD 600 Operating Manual page 136

Operating Guide | VLT® Soft Starter MCD 600
12.2.43 SCR Overtemperature
Cause
The temperature of the SCRs, calculated by the thermal model, is too high to allow further operation.
Troubleshooting
• Wait for the soft starter to cool.
• There are no parameters related to this trip message.
12.2.44 Starter Communication
Cause
There is a problem with the connection between the soft starter and the optional communications module.
Troubleshooting
• Remove and reinstall the card. If the problem persists, contact the local distributor.
• There are no parameters related to this trip message.
12.2.45 Starts per Hour
Cause
The soft starter has already attempted the maximum number of starts in the last 60 minutes.
Troubleshooting
• Wait before attempting another start.
• To determine when the waiting period ends, review the log.
• See also Parameter 5-17 Starts per Hour.
12.2.46 Thermistor Cct (Thermistor Circuit)
Cause
The thermistor input has been enabled and:
• The resistance at the input has dropped below 20 Ω (the cold resistance of most thermistors is above this value) or
• A short circuit has occurred.
Related parameters: None.
Troubleshooting
• Check and resolve this condition.
• There are no parameters related to this trip message.
136 | Danfoss A/S © 2018.10
Troubleshooting
AQ262141844215en-000202 / 175R1174