Sterling D48160s manual Problem Probable Cause Remedy, Electrical Faults

Page 97

TROUBLESHOOTING

					SECTION 7-4
					Electrical Faults

PROBLEM		PROBABLE CAUSE			REMEDY
Electrical Faults
A. Motor fails to start	1.	Power supply failure.	1.	Check fuses.

	2.	Starter is inoperative.	2.	Check supply mains. Also,
			check starter contacts for burning,
			replace if necessary.
	3.	Starter overloads cut out.	3.	Check current requirements on
			motor nameplate and adjust.
	4.	Safety interlock is inoperative.	4.	Check and adjust as needed.

B. Motor starts, but will not take	1.	Too much belt tension.	1.	Check belt tension and adjust
load.			as necessary. Refer to section 4.
	2. Motor is improperly wired.		2.	Check terminal connection
			with manufacturers connection
			diagram in conduit box and adjust
			as necessary.
	3.	Defective starter winding.	3.	Check current in each phase
			with an ammeter. If there is
			marked difference in current on
			any phase, contact the motor
			manufacturer.
C. Motor starts when	1.	Worn bearings.	1.	Check and replace if necessary,
disconnected from load, but will			in accordance with manufacturers
not when connected.			literature.
D. Jackscrew does not operate	1.	Over-temperature cutout is	1.	Allow cooling for 10 minutes,
after extended running.	activated.		and then retrying.
E. Hydraulic cylinders or	1.	Zero speed switch is		1. Check zero speed sensor
Jackscrews operate while rotor is	inoperative.				position.
in motion.				2.	Check zero speed
					electrical circuit.
F. Jackscrew motor continues	1.	Limit switches not properly		1. Set the limit switches
running after jackscrew reaches	set.				using the procedure in
its normal extended or retracted					section 4.
position.				2.	Check the electrical
					circuit.
G. Cutting chamber only –	1.	Limit switch on mounting		1.	Adjust the mounting
Jackscrew motor continues	bracket not properly set.				bracket switch. Refer to
running after motion of cutting					section 4.
chamber stops – Chamber may be				2.	Check electrical circuit
open or closed.

I. Hydraulic Pump Motor	1. Limit switches not properly set.
Continues to run after Chamber
or cradle closes.

1.Check limit switches using procedure in Section 4

2.Check the electrical circuit.

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Contents Sterling,Inc Sterling, Inc Refer to this Sheet When Ordering PartsTable of Contents Settings and Adjustments Topic SECTION/PAGE Table of Contents Operation Adjustable Rotor Knives…………………………………………………………………4-35From previous MaintenanceTroubleshooting MaintenanceParts Lists and Drawings Page Introduction What is a GRANULATOR?Section Learn Machine SafetyRotating Knives Safety Plate Follow the Safety InstructionsOpening Hopper Safety Plate Jackscrew Reversing Operation Guards Safety PlateHazardous Voltage Safety Plate Safety Instruction PlateMotor Rotation Safety Plate Rotating Knives Safety PlateSafety Clothing & Practices Keep Your Work Area Safe Wear Protective ClothingKeep CO-WORKERS OFF the Machine Be Sure the Rotor is Motionless Before Opening Machine Machine Opening DevicesOpen the Cutting Chamber SectionRestart the Granulator Clear the JAMMachine and Controls BP 2400 Series Granulator Right Front Quarter View BP 2400 Series Granulator Left Rear Quarter View Uncrate the Granulator Section OverviewAllow Adequate Work Space Section Move the Granulator to ITS Work SiteLevel the Granulator Remove the Protective Coating Electrical Wiring Section Check for Mechanical Interferences SET UP the Machine FunctionsCheck Rotation of Motors Alternate Test for the Interlock Switches Interlock Switch Test ProcedureInstallation Test the Zero Speed Sensor Alternate Test for the Interlock Switches from previousTest the Zero Speed Sensor LubricationSettings and Adjustments Release the Cutting Chamber Fasteners Open the Cutting Chamber InterlockSee -10 page 87 for Cutting Chamber Opening Instructions Install the Rotor Locating PIN Remove the BED Knives Loosen the Mounting ScrewsRemove the First Knife Clamp or Shield Replace the Upstroke Knife Clamp Replace the Upstroke BED KnifeReplace the Downstroke BED Knife GAP Adjustment TipsReplace the Downstroke Knife Shields Check the BED KnivesCheck the Knife GAP Measure the Knife GAPSET the Downstroke Knife Shield Tighten the Screws to Final Torque Finalize Installation of Upstroke BED KnifeSee -11 page 88 for Cutting Chamber Closing Instructions Fasten the Cutting Chamber Close the Cutting Chamber Safety InterlockBasic Facts about the Knives See -10 page 87 for Cutting Chamber Opening Instructions Remove the Mounting Screws Lock the RotorRemove the Rotor Knives Photo Clean Parts for ReassemblyMeasure the Knife GAP GAP Adjustment TipsTighten the Screws to Final Torque Check the Knife GAPFasten the Cutting Chamber Remove the Drive Guard Cover Inspect the Drive Belts Install the Matched BeltsRemove the Belts Tighten the Belt TensionMeasure the Belt Span Check the Pulley AlignmentCalculate the Allowable Belt Deflection Measure the Deflection ForceCompare Measured Force to Recommended Force Adjust the Belt TensionTighten the Motor Base Bolts Replace the Drive Guard Cover Setting and Adjusting the Chamber Jackscrew Cutting Chamber Open Setpoint Adjust the Jackscrew OPEN-POSITION Limit Switch If the Motor Stops Before the Cutting Chamber Closes SET the Jackscrew CLOSED-POSITION Limit SwitchSET the Jackscrew CLOSED-POSITION Limit SET & Test the Mounting Bracket Limit SwitchChamber Stops Before IT Closes but Motor Continues to RUN From previous Close the Cutting Chamber Safety Interlock Retract the Screen Cradle Retainers Cradle Open Position Adjust the Cradle OPEN-POSITION Limit Switch Check the Cradle CLOSED-POSITION Switch Close the Screen Cradle Retainers Adjust the Cradle CLOSED-POSITION Limit SwitchClose the Screen Cradle Interlock Zero Speed Sensor Adjust the Sensor PositionZero Speed Sensor Operation Control CircuitKnife Length Setting Rotor Knife Installation Into FixtureRotor Knife Preparation Adjustable Rotor Knife Installation Knife Length SETTING-INSPECTIONHydraulic Pump Operation Hydraulic Opening Position SwitchesOperation Check the Motor Rotation Direction Discharge AIR AdjustmentRUN the Motor Shut Down the Machine Cleaning the Discharge TransitionSafely Clearing a Jam Maintenance Check Daily Weekly Monthly Periodic Maintenance ScheduleBelt Tension Knife Screw TorqueScreen Condition Upper Chamber Pivot ARM-SCREWS Infeed Flap ConditionRetract the Screen Cradle Retainers Open the Screen Cradle InterlockSee -12 page 90 for Screen Cradle Lowering Instructions Replace the Screen Remove the ScreenMaintenance Close the Screen Cradle Interlock Cutting Chamber Access Open the Cutting Chamber with Hydraulics Open the Cutting Chamber with JackscrewsClose the Cutting Chamber with Jackscrews Fasten the Cutting Chamber Lower Raising the Screen Cradle with Jackscrews Rotor Knife Sharpening BED Knife Sharpening Test Equipment Troubleshooting ChartLocating Trouble Section Mechanical Faults Electrical Faults Problem Probable Cause RemedyBP2400 Series Parts List and Drawings 100 Parts Identification Drawing No. A-48050 Sheet 3 Parts Identification Drawing No. A-48050 Sheet 4 Parts Identification Drawing No. A-48150 Sheet 1 Parts Lists and Drawings Parts Identification Drawing No Sheet 1 Parts Identification Drawing No -460 Sheet 1 Wiring Diagram Drawing No. A-399598 Sheet 1 108 Drawing No -1 Sheet 1 Wiring Diagram for Hydraulics Drawing No. D-499061 Sheet 1 Wiring Drawing No. D-499044 Sheet 1 112 113