Safety Instructions And General Warning; High Voltage Warning; Safety Instructions; High Start Torque - Danfoss FC 300 Instruction Manual

FC 300 Instruction Manual

Safety Instructions and General Warning

High voltage warning

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The voltage of the FC 300 is dangerous whenever the converter is connected to electrical
power. Incorrect fitting of the motor or adjustable frequency drive may cause damage to
the equipment, serious injury or death. Consequently, it is essential to comply with the
instructions in this manual as well as local and national rules and safety regulations.

Safety Instructions

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Make sure the FC 300 is properly connected to ground.
•
Do not remove mains plugs or motor plugs while the FC 300 is connected to mains.
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Protect users against supply voltage.
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Protect the motor against overloading according to national and local regulations.
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• Motor overload protection is not included in the default settings. To add this function, set parameter
1-90 Motor thermal protection to value ETR trip or ETR warning. For the North American market:
ETR functions provide class 20 motor overload protection, in accordance with NEC.
The ground leakage current exceeds 3.5 mA.
•
The [OFF] key is not a safety switch. It does not disconnect the FC 300 from mains.
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Before commencing repair work
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Disconnect FC 300 from AC line.
1.
Disconnect DC bus terminals 88 and 89
2.
Wait at least 4 minutes
3.
Remove motor plugs
4.

High start torque

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While FC 300 is connected to AC line, the motor can be started/stopped using digital
commands, bus commands, references or a local stop.
Disconnect the FC 300 from AC line whenever personal safety considerations make
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it necessary to avoid unintended start.
MG.33.A2.22 - VLT is a registered Danfoss trademark
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