Shredder Fault Guide

Paper shredders are normally reliable devices, however the result of shredding paper are excessive levels of powder like paper dust, debris and lint accumulating inside the shredder especially with paper shredders that cross cut paper into fine particles. Where there has been a lack of regular maintenance, electronic and mechanical faults may sometimes occur. It’s best to have annual preventative maintenance performed to office shredders as recommended by most manufacturers of paper shredders. During annual preventative maintenance, mechanical and electronic components are thoroughly cleaned out, adjusted and lubricated. When an annual preventative maintenance program is in place, the level of failure is vastly reduced.

This shredder fault guide is designed to help navigate through common faults that users experience and can sometimes be corrected by users.

The Best User Maintenance Your Shredder Can Receive On A Regular Basis Is To Apply Shredder Oil To The Shredders Blades

Common Problems

 

Shredder Does Not Operate

  • Power Cable Plugged Into Outlet Properly & Turned On
  • Power Cable Plugged Into Shredder Properly
  • Main Power Switch On Shredder Is In The On Position
  • Shredder Control Switch Is Set To On Forward, or Standby for Auto Start/Stop Shredders
  • Door Is Closed / Bin Is Inserted Properly
  • Shredder Head Unit Is Positioned Correctly On Top Of The Bin
  • - Possible Fault With PCB If No Lights Or Displays Illuminate

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Shredder Hesitates To Start

  • Shredded Waste Bin Is Full
  • Has Shredder Oil Been Applied
  • First Unplug The Shredder, Open Door/Remove Bin And Look At The Output Side Of The Blades. If There Is Blocked Paper Manually Pick/Pull The Paper Out. Replace Bin And Run The Shredder In Reverse & Forward For 5 Seconds In Each Direction 3 Times.
  • Avoid Jams, By Feeding Less Than The Maximum Number Of Sheets That Your Shredder Is Designed To Shred
  • - Possible Faulty Paper Feed Guides (Strippers) If Build Up Of Paper Is Repeatedly Evident In The Same Area - Possible Dead Spot In Motor Or Faulty Start Capacitor - Cutting Mechanism Tight Due To Possible Damage – “Head Freeze” – Does Shredded Paper Look Normal?

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Will Not Stop After Shredding

  • Clean Shredder Auto Start/Stop Eye Sensors In Paper Feed
  • Be Sure Shredder Is Not Positioned Directly Below a Strong & Changing Light Source
  • - Possible Faulty Forward Run Switch (manual start/stop shredders) - Possible PCB, Switch, Auto Start/Stop Eye Sensor Fault

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Shredder Starts By Itself

  • 1: Dirty Auto Start Stop LED Sensors - Corrective Action: Unplug your shredder from its power source and wipe over all auto start stop sensors. There may be more than 1 set of sensors depending on your shredders design, with some having multiple dedicated feed entries for shredding of CD’s/DVD’s and Credit/Security/Member/ID Cards. Usually microfibre cloth works well wrapped around a thin ruler then inserted into the centre of the feed entrance rubbing up & down and side to side action wiping over the auto start stop sensors.
  • 2: Excessive Amounts of Light - Corrective Action: When locating your shredder, be sure not to place it directly under a bright source of light. Although rare, poorly designed shredders have been known to self start due to conditions where there is excessive amounts of light.
  • 3: Faulty Auto Start Stop LED Sensors - Corrective Action: Replacement of auto start stop sensors will be required by an experience shredder repairer.

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Shredder Starts Randomly

  • Clean Shredder Auto Start/Stop Eye Sensors For Paper Feed
  • Be Sure Shredder Is Not Positioned Directly Below a Strong & Changing Light Source
  • - Possible PCB, Switch, Auto Start/Stop Eye Sensor Fault

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Shredder Jams Easily

  • Has Shredder Oil Been Applied Regularly? Read Your Shredders Instruction Manual
  • Shredded Waste Bin Is Full
  • Run In Reverse & Forward 3 Consecutive Times
  • First Unplug The Shredder, Open Door/Remove Bin And Look At The Output Side Of The Blades. If There Is Blocked Paper Manually Pick/Pull The Paper Out. Run The Shredder In Reverse & Forward For 5 Seconds In Each Direction
  • Avoid Jams, By Feeding Less Than The Maximum Number Of Sheets That Your Shredder Is Designed To Shred
  • - Possible Faulty Paper Feed Guides (Strippers) If Build Up Of Paper Is Repeatedly Evident In The Same Area - Possible Damage To Cutting Mechanism – “Head Freeze” – Does Shredded Paper Look Normal?

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Shredder Operation Is Noisy

  • Is Shredder Being Oiled Regularly? Read Your Shredders Instruction Manual
  • Run In Reverse & Forward 5 Seconds Each Way 3 Consecutive Times
  • - Skipping Chain Or Slipping Belt – Requires Adjustment Or Replacement - Possible Damage To Cutting Mechanism – “Head Freeze” – Does Shredded Paper Look Normal?

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Shredder Jammed

  • First Unplug The Shredder, Open Door/Remove Bin And Look At The Output Side Of The Blades. If There Is Blocked Paper Manually Pick/Pull The Paper Out. Run The Shredder In Reverse & Forward For 5 Seconds In Each Direction
  • Where Possible Liberally Apply Some Shredder Oil Between The Jammed Pages, Run In Reverse & Forward Consecutively Until Paper Is Released
  • Avoid Jams, By Feeding Less Than The Maximum Number Of Sheets That Your Shredder Is Designed To Shred
  • - Possible Fault With Paper Feed Guides (Strippers) If Build Up Of Paper Is Repeatedly Evident In The Same Area - Possible Damage To Cutting Mechanism – “Head Freeze” – Does Shredded Paper Look Normal?

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Shows Full When Bin Is Not

  • When Lining The Shredders Bin With A Bag, Please Make Sure It's Made For Shredders Using Clear/Transparent Material. Using Regular Garbage Bags Of Solid Colour, The Sensor Will Not Function Correctly. Refrain From Using A White, Solid Colour Or Non-Transparent Bag
  • One Possible Cause May Be Paper Particles Covering The Bin Full Sensor Due To A Build Up Of Static. Try Cleaning The Sensors Wiping With A Dry Cloth Or Blowing Them With Compressed Air. Retest Once The Sensors Are Cleaned
  • First Unplug The Shredder, Open The Door/Remove The Bin And Look For A Pivoting Flap/Plate At The Output Side Of The Blades. Often The Flap/Plate Is Hanging Or Spring Loaded, Check Its Range By Pushing It Back Then Observing If It Returns Freely To It’s Original Position When Released. At The Same Time Carefully Listen For A Slight Click Noise From The Micro Switch When Pushed Forward And Returned
  • - If The Shredder Still Doesn't Work There May Be A Fault On The PCB, A Faulty Micro Switch Or A Dislodged Flap/Plate Which Could Happen During Relocation - Possible Dismantle Required To Refit Dislodged Flap/Plate

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Runs But Doesn't Shred

  • Try Running In Reverse Then Forward
  • If Shredder Runs & Sounds Different? Possible Gearbox/Chain/Belt (Transmission) Fault
  • If Shredder Runs & Sounds Normal? Possible Worn Cutter Shafts (Slippage)
  • - Possible Damage To Cutting Mechanism – “Head Freeze”

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Paper Not Shredded Properly

  • If Paper In Bin Has An Impression But Is Still In One Piece, This Is Almost Always Faulty Cutter Shaft Bearings, Bushes, Plates
  • Possibly Shreds One Sheet Thickness Normally But Not When Shredding A Greater Thickness

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Only Runs In Reverse

  • Shredded Waste Bin Is Full
  • Clean Shredder Auto Start/Stop Eye Sensors For Paper Feed
  • - Possible PCB Control Board Fault

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Door Open Light Stays On When Door Closed

  • 1: Cabinet Door Out of Adjustment - Corrective Action: If your shredders door has a striker or embedded magnet that activates the door open safety micro switch or reed switch inside the cabinet, it may not be aligned due to the door being out of adjustment. A shredders door that requires adjusting is usually obvious, in this case, adjust the door hinges.
  • 2: Cabinet Door Striker Bent or Out of Adjustment - Corrective Action: If your shredders door striker looks bent or broken, bend back to align with door open safety micro switch or replace if required.
  • 3: Faulty Door Open Sensor Switch - Corrective Action: Replace the door open safety micro switch or reed switch inside the cabinet. Best performed by an experience shredder repairer.
  • 4: Faulty Control PCB - Corrective Action: Replace the faulty control PBC. Best performed by an experience shredder repairer.

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