
100.210-IOM (FEB 2015)
Page 61
VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
MAINTENANCE
NORMAL MAINTENANCE OPERATIONS
Before.performing.any.routine.maintenance.or.service.on.this.
equipment,.read.this.section.thoroughly.first..This.section.
provides.instructions.for.normal.maintenance,.replacement.
of. the. power. module,. and. replacement. of. the. harmonic.
filter.module.
An.authorized.Johnson.Controls-Frick.service.representative.
should.perform.all.service.and.maintenance.activities.other.
than.the.standard.maintenance.activities.listed.below.
DANGER
Shock Hazard! Before beginning service, use proper
lock-out/tag-out procedures to disconnect all power
supplies related to this equipment. Verify all power is
removed from the supply leads. Death or severe personal
injury will occur if proper care is not taken.
DANGER
This equipment is for power conversion purposes. It is
energized with up to 600 volts AC and houses a DC bus
that is charged up to 1.4 times the incoming voltage. It
also encompasses multiple contactors that may open
and close without notice. It is not intended to be oper-
ated with the doors open and appropriate ARC FLASH
protection must be used when servicing.
DANGER
Shock Hazard! Wait five (5) minutes after switching
power to the Vyper™ OFF to allow capacitors in the
cabinet to discharge before opening the cabinet door.
Failure to do so will result in death or serious injury.
After opening the door, carefully verify that the incom-
ing power has been removed and that the DC bus is
completely discharged with a Cat. IV meter capable of
reading up to 1000 volts AC & DC.
WARNING
All service on this equipment should be performed
by Johnson Controls certified service personnel only.
Death, severe personal injury, and/or equipment dam-
age may occur if service is not performed by competent
personnel.
STANDARD MAINTENANCE
The. Vyper
™
. requires. very. little. facility-operator-supplied.
maintenance..The.only.routine.maintenance.item.involves.
the.coolant.system.
The. Vyper
™
. is. shipped. to. the. customer. with. a. premixed.
solution. of. 50/50. mixture. of. Propylene. Glycol. and. a. cor-
rosion. inhibitor.. This. shipping. fluid. needs. to. be. replaced.
before.starting.the.unit..Proper.disposal.of.the.Propylene.
Glycol.is.required.
The.standard.Frick.running.coolant.is.pink.in.color.and.con-
tains.a.nitrite.corrosion.inhibitor.to.reduce.corrosion.effects.
on.the.aluminum.surfaces.of.the.cooling.circuit..The.pink.
color.may.become.clear.over.time,.but.cooling.performance.
is.not.affected..Do.not.dilute.the.premixed.coolant.
Inspect.the.coolant.and.coolant.level.regularly.and.replace.
the.coolant.annually.using.the.steps.described.previously.in.
this.manual..Any.time.the.coolant.is.removed.from.system,.
always.discard.the.old.coolant.and.replace.with.new.coolant.
Coolant.that.is.any.other.color.than.pink.(or.clear).indicates.
bacterial.growth.or.corrosion..Symptoms.are.as.follows:
• Brown or green in color indicates that bacteria growth
is occurring.
• Milky white coolant or the presence of a white milky
coating inside of the tubing indicates corrosion exists
on the inside of the cooling system and is oxidizing
the aluminum components.
If.any.of.these.conditions.occur,.use.proper.health.and.dis-
posal.precautions.when.draining.the.coolant..Referring.to.
the.coolant.changing.procedure.described.previously.in.this.
manual,.use.the.following.steps.to.replace.the.coolant.in.the.
contaminated.system:
1.. Drain.the.coolant.and.blow.the.system.out.with.com-
pressed.air.
2.. Flush.the.coolant.system.out.thoroughly.with.water.
3.. Fill.the.coolant.loop.with
Ethylene Glycol
.(Not.Propylene.
Glycol,.normal.Frick.running.coolant).
4.. Circulate.the.Ethylene.Glycol.for.one.hour.
5.. Drain.the.Ethylene.Glycol.and.refill.the.coolant.loop.with.
Frick.running.coolant.
6.. Check. the. coolant. system. in. two. weeks. for. bacteria.
growth.and/or.corrosion.
REPLACEMENT OF THE
VYPER
™
POWER MODULE
WARNING
The Vyper
™
Power Module is to be replaced by Johnson
Controls certified service personnel only. Death, severe
personal injury, and/or equipment damage may occur
if service is not performed by competent personnel.
The. following. is. a. step-by-step. procedure. describing. the.
replacement.of.the.Vyper
™
.power.module..Follow.this.pro-
cedure.minimize.the.possibility.of.damage.to.other.system.
components.or.to.the.Vyper
™
.drive.
Save.all.the.packing.material..This.material.must.be.reused.
when. returning. a. defective. power. module. for. warranty.
claims.
Power.module.replacement.procedure:
1.. Be.certain.the.Vyper
™
.has.been.de-energized.for.over.
five. minutes,. and. then. double-check. for. presence. of.
voltage. using. a. VOM.. The. DC. bus. must. be. fully. dis-
charged.
2.. Drain.the.coolant.from.the.heat.exchanger.into.a.suitable.
container.and.discard..Use.proper.handling.and.disposal.
procedures,.as.the.coolant.may.contain.bacteria.
3.. Remove.the.connector.to.the.IGBT.Gate.driver.board.
4.. Remove.and.discard.the.six.(6).Phillips.head.screws.from.
the.power.wire.connector.tangs.and.the.remaining.(6).
Phillips.head.screws.from.the.bus.connections.
5.. Remove.and.discard.the.eight.(8).Allen.screws.from.the.
IGBT.module.
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