RXB PLUS ROTARY SCREW COMPRESSOR UNITS
MAINTENANCE
070.101-IOM (JAN 13)
Page 44
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TROUBLESHOOTING FRICK SBC MICROPROC ESSOR SYSTEM (Continued)
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SYMPTOM
PROBABLE CAUSES and CORRECTIONS
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. DISPLAY.SCREENS.DISPLAY.
A.loose.or.improper.connection.between.the.displays.and.the.SBC.is.indicated...Remove.fuse
. SCRAMBLED.PATTERN.OR.
(2FU,.10.amp).for.15.seconds,.then.restore.to.reset.the.displays.
. LIST.ALPHABET
. OIL.PUMP.DOES.NOT.START.
Verify.that.the.Oil.Pump.HAND-OFF-AUTO.switch.(1SS).is.in.the.AUTO.position.and
. (Optional).
that.the.Emergency.Stop.Button.is.not.depressed.
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Output.11.controls.the.Oil.Pump.Starter.Relay.(3CR).when.in.the.AUTO.mode..If.HAND.is
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selected.on.1SS,.Output.11.will.not.have.any.effect.on.the.operation.of.the.oil.pump.starter.
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If.AUTO.has.been.selected.and.the.oil.pump.does.not.start,.check.for.120VAC
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between.Wires.39.and.2..If.120VAC.is.not.found.when.the.LED.for.Output.11.is.on,
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check.the.fuse.(FU11)...If.the.problem.persists,.check.the.control.relay.(3CR).
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The.Oil.Pump.Starter.Auxiliary.Contact.switches.voltage.to.Input.6.(Wires.28
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and.2).when.the.auxiliary.contacts.are.closed.and.the.AUTO.mode.is.selected.on
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1SS..If.the.Input.does.not.turn.on.and.voltage.is.present.at.Input.6,.consult
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Frick.
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. OIL.PUMP.IS.RUNNING.BUT.
The.(HAND-OFF-AUTO).Oil.Pump.Selector.Switch.(1SS).controls.oil.pump.operation
. COMPRESSOR.DOES.
and.must.be.in.the.AUTO.position.before.the.compressor.can.be.started.
. NOT.START.(Optional)
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Verify.that.the.Slide.Valve.has.unloaded.to.5%.or.less..If.the.Slide.Valve.has
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not.unloaded,.trouble.shoot.the.hydraulic.system..The.compressor.will.not.start
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until.the.Slide.Valve.is.unloaded.
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Output.1.controls.the.motor.starter..Check.between.terminals.38.and.2.for.120VAC.
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If.120VAC.is.not.found.when.the.LED.for.Output.1.is.on,.check.the.fuse.(FU1).