Avoid Unintended Start - Danfoss VLT HVAC Operating Instructions Manual

1. Safety
1.1.7. Caution
1
The frequency converter DC link capacitors remain charged after power has been disconnec-
ted. To avoid an electrical shock hazard, disconnect the frequency converter from the mains
before carrying out maintenance. Wait at least as follows before doing service on the fre-
quency converter:
Voltage
200 - 240 V
380 - 480 V
525 - 600 V
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.
1.1.8. Installation at High Altitudes (PELV)

1.1.9. Avoid unintended Start

While the frequency converter is connected to mains, the motor can be started/stopped using
digital commands, bus commands, references or via the Local Control Panel.
•
•
•
6
Min. Waiting Time
4 min.
1.1 - 3.7 kW
1.1 - 7.5 kW
1.1 - 7.5 kW
By altitudes above 2 km, please contact Danfoss Drives regarding PELV.
Disconnect the frequency converter from mains whenever personal safety considerations
make it necessary to avoid unintended start.
To avoid 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
mains supply, or lost motor connection may cause a stopped motor to start.
MG.11.A4.02 - 09.10.06. VLT
®
VLT
Caution
15 min.
5.5 - 45 kW
11 - 90 kW
® is a registered Danfoss trademark
HVAC Drive Operating Instructions