Before Commencing Repair Work - Danfoss Native BACnet VLT HVAC Drive Operating Instructions Manual

Safety
Warning against Unintended Start
1. The motor can be brought to a stop by means of
digital commands, bus commands, references or a
local stop, while the frequency converter is
connected to mains. If personal safety consider-
ations make it necessary to ensure that no
unintended start occurs, these stop functions are
not sufficient.
2. While parameters are being changed, the motor
may start. Consequently, the stop key [STOP/RESET]
must always be activated; following which data can
be modified.
3. A motor that has been stopped may start if faults
occur in the electronics of the frequency converter,
or if a temporary overload or a fault in the supply
mains or the motor connection ceases.
1.1.3 Symbols
Symbols used in this manual
NOTE
Indicates something to be noted by the reader.
CAUTION
Indicates a general warning.
WARNING
Indicates a high-voltage warning.
✮ Indicates default setting

1.1.4 Before Commencing Repair Work

1. Disconnect the frequency converter from mains
2. Disconnect DC bus terminals 88 and 89
3. Wait at least the time mentioned in section General
Warning above
4. Remove motor cable
®
VLT HVAC Drive Native BACnet Operating Instructions
®
MG.14.C1.02 - VLT is a registered Danfoss trademark
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