Avoid Unintended Start - Danfoss VLT Automation Drive FC 300 Instruction Manual

VLT ® Automation Drive FC 300
Instruction Manual High Power
2.1.4 Before Commencing Repair Work
1. Disconnect the adjustable frequency drive from line power.
2. Disconnect DC bus terminals 88 and 89 from load share applications
3. Wait for the discharge of the DC link. See period of time on the warning label.
4. Remove motor cable

2.1.5 Avoid Unintended Start

While the adjustable frequency drive is connected to line power, the motor can be started/stopped using digital commands, bus
commands, references or via the Local Control Panel.
• Disconnect the adjustable frequency drive from line power whenever personal safety considerations make it necessary to avoid an unintended
start.
• To avoid an unintended start, always activate the [OFF] key before changing parameters.
• An electronic fault, temporary overload, a fault in the line supply, or lost motor connection may cause a stopped motor to start. The adjustable
frequency drive with safe stop provides protection against unintended start, if Safe Stop Terminal 37 is deactivated or disconnected.
MG.33.U2.22 - VLT ® is a registered Danfoss trademark
2 Safety Instructions and General Warning
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