Avoid Unintended Start - Danfoss VLT AQUA Instruction Manual

VLT AQUA High Power Instruction Manual
2.1.5 Caution
The adjustable frequency drive's DC link capacitors remain charged after power has been disconnected. To avoid an electrical shock
hazard, disconnect the adjustable frequency drive from line power before carrying out maintenance. Before doing service on the
adjustable frequency drive, wait at least the amount of time indicated below:
Voltage
380–480 V
525–690 V
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.

2.1.6 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.
• Unless terminal 37 is turned off, an electronic fault, temporary overload, a fault in the line power supply or lost motor connection may cause a
stopped motor to start.
Power size
150–350 HP [110–250 kW]
450–1350 HP [315–1000 kW]
60–550 HP [45–400 kW]
450–1200 kW
®
MG.20.P3.22 - VLT is a registered Danfoss trademark
2 Safety
Min. Waiting Time
20 minutes
40 minutes
20 minutes
30 minutes
2
2-3