quency drive, or if a temporary overload or a fault in the supply line or the motor connection
ceases.
Warning:
Touching the electrical parts may be fatal - even after the equipment has been dis-
connected from line power.
Also, make sure that other voltage inputs have been disconnected, such as external 24 V DC, load
sharing (linkage of DC intermediate circuit), as well as the motor connection for kinetic backup.
Refer to
VLT® HVAC Drive Instruction Manual MG.11.Ax.yy
for further safety guidelines.
2.1.2. Caution
Caution
The adjustable frequency drive DC link capacitors remain charged after power has been dis-
connected. To avoid the risk of electrical shock, disconnect the adjustable frequency drive
from line power before performing maintenance procedures. Wait at least as long as follows
before servicing the adjustable frequency drive:
Voltage
Min. Waiting Time
4 min. 15 min.
200 - 240 V 1.5-5 hp [1.1-3.7 kW] 7.5-60 hp [5.5-45 kW]
380 - 480 V 1.5-10 hp [1.1-7.5 kW] 15-125 hp [11-90 kW]
525 - 600 V 1.5-10 hp [1.1-7.5 kW]
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.
2.1.3. Disposal Instructions
Equipment containing electrical components may not be disposed of
together with domestic waste.
It must be collected separately as electrical and electronic waste in
accordance with local and currently valid legislation.
2. Introduction to the VLT HVAC Drive VLT
®
HVAC Drive Design Guide
14
MG.11.B4.22 - VLT
®
is a registered Danfoss trademark.
2
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