6
VFDB-SVX001A-EN
Overview
All electrical circuits shall be treated as energized until all
lockout/tagout procedures are in place and the circuit has
been tested to verify that it is de-energized. The medium
voltage motor terminal box cover must not be removed if
power is present, or if there is a possibility that power may
be present. Working on energized medium voltage circuits
is not an approved practice for normal HVAC maintenance
or service.
Important:
•
Before servicing, disconnect all power sources and
allow at least 20 minutes for capacitors to discharge.
•
All electrical enclosures-unit or remote-are IP2X.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized.When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
WARNING
Hazardous Voltage w/Capacitors!
Failure to follow instructions below could result in
death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors.
If this equipment is interlocked with other equipment,
115 volt AC may be present in the cabinet even though
the main power is disconnected. Interlock signals must
be deactivated by qualified personnel prior to any work
in the cabinet.
Verify with an appropriate voltmeter that all capacitors
have discharged, and interlock signals have been
deactivated from all circuits.
WARNING
Capacitors Must be Allowed to
Discharge!
Failure to follow instructions below could result in
death or serious injury.
Each time power is removed, allow at least 20 minutes
for DC units to discharge after power is disconnected
before servicing. Use extreme caution when applying
power. Equipment terminals and other internal parts of
the controller are at line voltage when ac power is
connected to the controller. All ungrounded conductors
of the ac power line must be disconnected from the
controller before it is safe to touch any internal parts of
this equipment.
