
100.210-IOM (FEB 2015)
Page 72
VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
VDC.for.50.hz).within.5.seconds.after.the.filter.precharge.
relay.is.energized..The.unit.is.shut.down.and.this.message.
is.generated.if.this.condition.is.not.met..If.this.shutdown.
occurs,. check. the. filter. precharge. relay,. filter. precharge.
resistors,.and.the.wiring.between.the.filter.logic.board.and.
the.filter.precharge.relay.
Fault 67: Harmonic Filter DC Current Transformer 1
Message
Quantum:.“Fault.67”
Quantum.LX:.“harmonic.Filter.DC.Current.Transformer.1”
During. initialization,. the. output. voltage. of. the. two. DCCT’s.
that. sense. the. filter’s. input. current. will. be. monitored. and.
compared.against.a.level.of.±.147.mv.(±.6010.A.to.D.counts)..
If.the.offset.error.falls.outside.this.range,.the.unit.will.trip.and.
the.Quantum
™
LX.panel.displays.Fault.67..If.a.DCCT.error.fault.is.
not.encountered,.an.average.of.eight.readings.on.each.DCCT.
output.will.be.taken.and.used.for.DCCT.offset.compensation...
The.three.phases.of.VSD.input.current.are.sensed.by.two.cur-
rent.transformers..The.three.phases.of.filter.input.current.are.
sensed.by.two.D.C..current.transformers..The.third.filter.input.
current.is.derived.from.the.equation.I
f2
.=.-I
f1
.–I
f3
..
Fault 68: Harmonic Filter DC Current Transformer 2
Message
Quantum:.“Fault.68”
Quantum.LX:.“harmonic.Filter.DC.Current.Transformer.2”
Same. as. Fault. 67. except. applying. to. harmonic. Filter. DC.
Current.transformer.2.
Fault 69: Harmonic Filter High Baseplate Temperature
Message
Quantum:.“Fault..69”
Quantum.LX:.“harmonic.Filter.high.Baseplate.Temp.Fault”
The.Filter’s.power.module.baseplate.temperature.(see.Ap-
pendix.I.for.thermistor.temperature.vs..A.to.D.count).will.feed.
plug.J6.on.the.harmonic.Filter.Logic.board..This.temperature.
is.compared.in.software.to.a.limit.of.175°F.(79°C).and.if.the.
limit.is.exceeded,.the.unit.trips.and.the.Quantum
™
LX
.
.panel.
displays.Fault.69.
A.thermistor.sensor.is.located.inside.the.IGBT.Module.on.the.
filter.power.module..If.at.anytime.this.thermistor.detects.a.
temperature.of.175°F.(79°C).or.higher,.a.shutdown.will.oc-
cur..A.manual.reset.is.required.by.pressing.the.“Overtemp.
Reset”.push.button.located.on.the.Filter.Logic.board..The.
occurrence.of.this.message.typically.indicates.the.level.of.
coolant.in.the.Vyper
™.
cooling.system.is.low.
Fault 71: Harmonic Filter Low DC Bus Voltage
Message
Quantum:.“Fault.71”
Quantum.LX:.“harmonic.Filter.Low.DC.Bus.Voltage”
The.DC.link.voltage.magnitude.should.remain.within.-80.VDC.
of.the.bus.voltage.setpoint.determined.from.the.peak.input.
voltage..If.the.DC.link.voltage.magnitude.falls.outside.this.
range.for.100.msec,.the.unit.will.trip.and.the.Quantum
™
LX.
panel.displays.Fault.71.
The. harmonic. filter. dynamically. generates. its. own. filter.
DC. link. voltage. by. the. interaction. of. the. filter. choke. and.
switching.its.IGBTs..This.DC.level.is.higher.than.what.could.
be.achieved.by.rectifying.the.input.line.voltage..Thus,.the.
harmonic.filter.actually.performs.a.voltage.“boost”.function..
This.is.necessary.in.order.to.permit.current.to.flow.into.the.
AC.line.from.the.filter.when.the.AC.line.is.at.its.peak.level..
This.particular.shutdown.and.the.accompanying.message.is.
generated.if.the.filter’s.DC.link.voltage.drops.to.a.level.less.
than.80.VDC.below.the.filter.DC.link.voltage.setpoint..The.
filter.DC.link.voltage.setpoint.is.determined.by.the.filter.logic.
board.via.the.sensing.of.the.three.phase.input.line-to-line.
voltage..This.setpoint.is.set.to.the.peak.of.the.sensed.input.
line-to-line.voltage.plus.59.volts,.not.to.exceed.760.volts.and.
varies.with.the.input.line-to-line.voltage..If.this.shutdown.
occurs.occasionally,.the.likely.cause.is.a.severe.sag.in.the.
input.line.voltage..Install.a.power.monitor.to.determine.if.a.
power.problem.exists..Also,.verify.the.operation.of.the.AC.
line.voltage.isolator.board,.by.comparing.the.phase.to.phase.
voltage. on. J5. pins. 1-3.. The. three. voltage. measurements.
should.be.almost.the.same.voltage,.approximately.5.2.VAC.
Fault 75: Harmonic Filter DC Bus Voltage Imbalance
Message
Quantum:.“Fault.75”
Quantum.LX:.“harmonic.Filter.DC.Bus.Voltage.Imbalance”
The.one-half.DC.link.voltage.magnitude.will.remain.within.
±.50VDC.of.the.total.DC.link.voltage.divided.by.two.during.the.
precharge.interval.for.both.60.and.50.hz.519.filters..If.voltage.
is.outside.±.50VDC,.the.Quantum
™
LX.panel.displays.Fault.75.
The.one-half.DC.link.voltage.magnitude.will.remain.within.±.
50.VDC.of.the.total.DC.link.voltage.divided.by.two.for.both.
60.and.50.hz.519.filters..If.the.one-half.DC.link.magnitude.
exceeds. this. ±. 50VDC. window,. the. unit. will. trip. and. the.
Quantum™LX.panel.display.s.Fault.75.
The.Filter.DC.link.is.filtered.by.large,.electrolytic.capacitors.
which.are.rated.for.450.VDC..These.capacitors.are.wired.in.
series.to.achieve.a.900.VDC.capability.for.the.DC.link..The.
voltage.must.be.shared.equally.from.the.junction.of.the.cen-
ter.or.series.capacitor.connection,.to.the.negative.bus.and.to.
the.positive.bus..This.center.point.should.be.approximately.
half.of.the.total.DC.link.voltage.
Verify. the. problem. exists. using. a. pair. of. digital. meters,.
measuring.from.the.series.capacitor.connection.point.(wire.
525A).to.the.positive.bus.(wire.526A),.and.from.the.series.
capacitor.connection.point.to.the.negative.bus.(wire.524A)..
When.the.filter.precharge.relay.engages,.both.voltage.read-
ings.should.register.simultaneously.with.values.that.is.within.
±.50.VSD.of.each.other..If.the.voltages.are.equal,.check.the.
filter.bus.isolator.board,.the.filter.logic.board,.or.the.wiring/
connectors.between.the.boards..Check.the.voltages.at.the.
input.to.the.filter.logic.board,.J5.pin.4.to.J5.pin.5.and.J5.pin.
5.to.J5.pin.6..The.voltages.should.be.approximately.equal..If.
voltage.are.not.equal,.the.likely.cause.is.a.defective.isolator.
board.or.a.loose.connection.
If.the.voltages.are.balanced,.the.filter.logic.board.is.defec-
tive..If.the.voltages.are.not.equal,.check.the.wiring.between.
the.bleeder.resistors.12RES.and.13RES.and.the.filter.power.
module..Also.check.the.value.of.these.resistors..They.should.
be.3000.ohms.nominally..If.a.problem.is.not.found.by.per-
forming.these.steps,.replace.the.filter.power.module.
Fault 76: Harmonic Filter 110% Input Current Overload
Message
Quantum:.“Fault.76”
Quantum.LX:.“harmonic.Filter.110%.Input.Current.Overload”
The.overload.threshold.and.timer.functions.reside.in.software.
on.the.harmonic.Filter’s.Logic.board..The.unit’s.three.phases.