Safety; Safety Symbols; Qualified Personnel; Safety Precautions - Danfoss VLT HVAC Drive FC 102 Design Manual

Safety

2 Safety
2 2

2.1 Safety Symbols

The following symbols are used in this guide:
WARNING
Indicates a potentially hazardous situation that could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that could
result in minor or moderate injury. It can also be used to
alert against unsafe practices.
NOTICE
Indicates important information, including situations that
can result in damage to equipment or property.

2.2 Qualified Personnel

Only qualified personnel are allowed to install or operate
this equipment.
Qualified personnel are defined as trained staff, who are
authorized to install, commission, and maintain equipment,
systems, and circuits in accordance with pertinent laws and
regulations. Also, the personnel must be familiar with the
instructions and safety measures described in this manual.

2.3 Safety Precautions

WARNING
HIGH VOLTAGE
Drives contain high voltage when connected to AC mains
input, DC supply, load sharing, or permanent motors.
Failure to use qualified personnel to install, start up, and
maintain the drive can result in death or serious injury.
•
Only qualified personnel must install, start up,
and maintain the drive.
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
drive properly can result in death or serious injury.
•
Ensure the correct grounding of the equipment
by a certified electrical installer.
6
®
VLT HVAC Drive FC 102
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain
charged even when the drive is not powered. High
voltage can be present even when the warning LED
indicator lights are off. Failure to wait 40 minutes after
power has been removed before performing service or
repair work can result in death or serious injury.
1.
2.
3.
4.
5.
FIRE HAZARD
Brake resistors get hot during and after braking. Failure
to place the brake resistor in a secure area can result in
property damage and/or serious injury.
•
•
NOTICE
MAINS SHIELD SAFETY OPTION
A mains shield option is available for enclosures with a
protection rating of IP21/IP54 (Type 1/Type 12). The
mains shield is a cover installed inside the enclosure to
protect against the accidental touch of the power
terminals, according to BGV A2, VBG 4.
Danfoss A/S © 11/2017 All rights reserved.
WARNING
Stop the motor.
Disconnect AC mains and remote DC-link
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
Disconnect or lock motor.
Wait 40 minutes for the capacitors to discharge
fully.
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
WARNING
Ensure that the brake resistor is placed in a
secure environment to avoid fire risk.
Do not touch the brake resistor during or after
braking to avoid serious burns.
MG16C302