
100.210-IOM (FEB 2015)
Page 70
VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
This.message.is.generated.when.communications.between.
the.Quantum
™
LX.Panel.and.the.Frick.Interface.board,.or.the.
Frick.Interface.board.and.Vyper
™
.Logic.board.is.disrupted.for.
a.least.22.seconds..Check.the.shielded.cable.between.J11.on.
the.Vyper
™
.Logic.board.and.J8.on.the.Frick.Interface.board...
Check.for.continuity.and.also.check.to.see.that.none.of.the.
conductors.are.shorted.together.or.shorted.to.ground..The.
terminal.block.in.the.lower.left.corner.of.the.Vyper
™
.cabinet.
serves.as.a.junction.point.for.this.cable..There.is.the.pos-
sibility.for.strands.of.wire.to.bridge.across.the.terminals.at.
this.location..If.all.wiring.is.intact,.this.problem.may.also.be.
caused.by.electrical.noise..Ensure.that.the.chiller.and.the.
Quantum
™
LX.Panel.are.properly.ground.through.the.Vyper
™
...
Make.certain.the.shield.for.this.cable.is.tied.to.chassis.ground.
at.the.Quantum
™
LX.panel.end.only.via.a.green.chassis.ground.
screw..The.shield.should.not.go.to.ground.through.the.Frick.
Interface.board..If.all.of.this.has.been.done.and.communica-
tions.cannot.be.established,.even.at.power-up,.you.may.have.
a.bad.communications.driver.on.either.the.Vyper
™
.Logic.or.
the.Frick.Interface.boards..Change.out.both.the.Frick.Interface.
and.Vyper
™
.Logic.boards..If.the.Serial.Receive.fault.problem.
only.occurs.intermittently.during.times.when.the.unit.is.run-
ning,.the.culprit.could.be.electrical.noise..
If.the.harmonic.Filter.is.installed.then.the.fault.can.be.gener-
ated.when.the.communications.between.the.Vyper
™
.Logic.
board.and.the.harmonic.Filter.Logic.board,.or.the.harmonic.
Filter.Logic.board.and.the.Frick.Interface.board.is.disrupted..
Also.check.J8.on.the.filter.logic.board.and.J9.on.the.Frick.
Interface.board..Repeat.the.above.procedure.for.the.Vyper
™
.
serial.cable.on.the.harmonic.Filter.serial.cable.
Fault 43: Vyper
™
Precharge Lockout
Message
Quantum:.“Fault.43”
Quantum.LX:.“VSD.Precharge.Lockout”
If.the.Vyper
™
.fails.to.meet.the.precharge.criteria.(refer.to.
precharge.faults.below),.then.the.precharge.circuit.will.wait.
for.a.period.of.ten.(10).seconds..During.this.time,.the.unit’s.
cooling.fans.and.coolant.pump.remain.energized.in.order.to.
cool.the.input.SCR’s..Following.this.ten-second.cool-down.
period,.precharge.will.again.be.initiated..The.unit.will.attempt.
to.meet.the.precharge.criteria.three.consecutive.times..If.
the. Vyper
™
. fails. to. meet. the. precharge. criteria. on. three.
consecutive.tries,.the.Vyper
™
.will.shut.down,.lock.out,.and.
display.this.message..In.order.to.initiate.precharge.again,.
the.Quantum
™
LX.panel’s.compressor.switch.must.first.be.
placed.into.the.STOP/RESET.position.
Fault 44: Vyper
™
Low Converter Heat Sink Temperature
Message
Quantum:.“Fault.44”
Quantum.LX:.“VSD.Low.Converter.heatsink.Temp.Fault”
The. phase. bank. assembly. heatsink. temperature. and. the.
inverter.module.baseplate.temperature.are.compared.to.a.
lower.limit.of.37°F.(3°C)..If.the.inverter.baseplate.tempera-
ture.or.the.converter.heat.sink.temperature.falls.below.37°F.
(3°C),.the.message.displayed.is.Fault.44..In.addition,.if.both.
temperatures. fall. below. the. 37°F. (3°C). limit,. the. unit. will.
trip.and.the.fan(s).and.water.pump.will.be.energized..This.
feature.provides.service.personnel.with.the.ability.to.run.the.
water.pump.while.filling.the.cooling.system.(by.pulling.VSD.
logic.board.plug.P2).
A. thermistor. sensor. is. located. behind. the. last. SCR/Diode.
block.on.the.copper.chill.plate.of.the.Vyper
™
.Power.Unit..
If.at.anytime.this.thermistor.detects.a.temperature.of.37°F.
(3°C).or.lower.a.shutdown.will.occur..Sometimes.a.thermistor.
wire.can.be.pinched.against.the.enclosure.
In.most.cases,.the.problem.will.actually.be.an.open.thermistor.
or.broken.wiring.to.the.thermistor..The.normal.thermistor.
resistance.is.10K.ohms.at.77°F.(25°C)..Check.the.circuit.for.
continuity.at.Vyper
™
.Logic.board.plug.J2..Also.make.certain.
one.side.of.the.circuit.is.not.shorted.to.the.cabinet...
Fault 45: Vyper Low Current Imbalance
Message
Quantum:.“Fault.45”
Quantum.LX:.“VSD.Current.Imbalance.Fault”
When.the.average.of.the.three.output.phase.currents.(see.
section.10.1).exceeds.80%.of.the.100%.Job.FLA.(see.section.
13.1.6),.the.%.Output.Current.Imbalance.is.calculated.using.
the.following.equation:.
(I
a
-I
ave
).+.(I
b
-I
ave
).+.(I
c
-I
ave
)
X.100.=
(I
a
.+.I
b
.+.I
c
)
2(I
ave
)
3
If.the.%.Imbalance.exceeds.30%.continuously.for.45.seconds,.
the.unit.trips.and.the.Quantum
™
LX.panel.displays.Fault.45..
The.imbalance.fault.is.released.when.the.average.of.the.three.
output.phase.currents.drops.below.80%.FLA.
Fault 46: Vyper Precharge – DC Bus Voltage Imbalance
Message
Quantum:.“Fault.46”
Quantum.LX:.“VSD.Precharge.DC.Bus.Voltage.Imbalance”
The. half. DC. link. voltage. magnitude. will. remain. within.
±.88VDC.of.the.total.DC.link.voltage.divided.by.two.during.
the.precharge.interval.for.both.the.60.and.50.hz.VSD’s..If.
not,.the.Quantum
™
LX.panel.displays.Fault.46.
The.definition.for.this.fault.is.identical.to.“VSD.-.DC.Bus.
Voltage.Imbalance”,.except.that.the.fault.has.occurred.during.
the.precharge.period.which.begins.during.prelube.
Fault 47: Vyper Precharge – Low DC Bus Voltage 2
Message
Quantum:.“Fault.47”
Quantum.LX:.“VSD.Precharge.Low.DC.Bus.Voltage.2”
The.DC.link.voltage.will.reach.at.least.500.VDC.within.20.
seconds.after.the.precharge.signal.has.been.asserted.on.the.
60.hz.VSD.and.at.least.414.VDC.within.20.seconds.on.the.50.
hz.VSD..If.not,.the.Quantum
™
LX.panel.will.display.Fault.47.
The.unit.is.shut.down.and.this.message.is.generated.if.this.
condition.is.not.met..If.this.shutdown.occurs,.measure.the.
bus.voltage.at.the.laminated.bus.structure,.check.the.wiring.
between.the.Vyper
™
.Logic.board.and.Quantum
™
LX.Vyper
™
.
trigger.board,..and.the.input.SCR’s,.and.the.DC.bus.isolator.
board.and.the.Vyper
™
.Logic.board.
Fault 48: Vyper Precharge – Low DC Bus Voltage 1
Message
Quantum:.“Fault.48”
Quantum.LX:.“VSD.Precharge.Low.DC.Bus.Voltage.1”
The. DC. Bus. voltage. must. be. equal. to. or. greater. than. 50.
VDC.for.60.hz.(41.VDC.for.50.hz).four.(4).seconds.after.
precharge.has.begun..The.unit.is.shut.down.and.this.mes-
sage.is.generated.if.this.condition.is.not.met..If.this.shut-