Danfoss VLT AQUA Drive FC 202 Operating Manual page 121

Operating Guide | VLT® AQUA Drive FC 202
Troubleshooting
• Check the settings for warning/alarm/disabling in parameter 4-30 Motor Feedback Loss Function.
• Set the tolerable error in parameter 4-31 Motor Feedback Speed Error.
• Set the tolerable feedback loss time in parameter 4-32 Motor Feedback Loss Timeout.
8.4.58 WARNING 62, Output Frequency at Maximum Limit
Cause
The output frequency has reached the value set in parameter 4-19 Max Output Frequency.
Troubleshooting
• Check the application for possible causes.
• Increase the output frequency limit. Be sure that the system can operate safely at a higher output frequency.
The warning clears when the output drops below the maximum limit.
8.4.59 ALARM 63, Mechanical Brake Low
Cause
The actual motor current has not exceeded the release brake current within the start delay time window.
8.4.60 WARNING 64, Voltage Limit
Cause
The load and speed combination demands a motor voltage higher than the actual DC-link voltage.
8.4.61 WARNING/ALARM 65, Control Card Overtemperature
Cause
The cutout temperature of the control card has exceeded the upper limit.
Troubleshooting
• Check that the ambient operating temperature is within the limits.
• Check for clogged filters.
• Check the fan operation.
• Check the control card.
8.4.62 WARNING 66, Heat Sink Temperature Low
Cause
The drive is too cold to operate. This warning is based on the temperature sensor in the IGBT module.
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Maintenance, Diagnostics, and
Troubleshooting
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