- Garden
- Cordless garden tools
Green lamp blinking
Makita Green lamp blinking on DUR192L trimmer: overload
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On the Makita DUR192L 18 V cordless grass trimmer, when the tool stops automatically and the indicator lamp starts blinking in green, overload protection has tripped. Release the switch trigger, turn the tool off, and remove the battery cartridge before clearing entangled weeds or debris.
Safety first
Stop and check this first
- If grass, entangled weeds or branches get caught between the cutting attachment and guard, always turn the tool off and remove the battery cartridge before cleaning, and never touch moving hazardous parts before they have come to a complete stop (the cutting attachment continues to rotate for a short period after turning the tool off).
- Never tape down or defeat the lock-off lever, never use the tool without the guard (protector) illustrated in place, and never use metal blades including metal multi-piece pivoting chains and flail blades; if the cutting tool and motor cannot stop, remove the battery immediately and ask your local Makita Authorized Service Center for repair.
Safe checks you can perform
- Release the switch trigger and turn on the main power button without pulling the trigger
- Turn the tool off, remove the battery cartridge, and clear entangled weeds or branches
- Verify battery seating, battery check lamps, and red overheat or overdischarge states
Leave these tasks to a qualified professional
- Do not attempt this professional task: Replacement of a broken, bent or worn nylon cutting head or ineffective battery cartridge
- Do not attempt this professional task: Drive system, electric brake, or electronic malfunction repair at a Makita Authorized Service Center
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Replacement of a broken, bent or worn nylon cutting head or ineffective battery cartridge
What they doWhen hitting stones or hard objects leaves the cutting attachment cracked, broken, bent or worn, or when recharging the battery cartridge is no longer effective, an authorized service center supplies or installs the genuine Makita replacement.
They must show youvibration-free operation with the genuine Makita nylon cutting head firmly tightened on the spindle and the hex wrench removed.
In writingthe part reference of the genuine Makita nylon cutting head or replacement battery cartridge.
Drive system, electric brake, or electronic malfunction repair at a Makita Authorized Service Center
What they doIf the motor does not run, fails to reach maximum RPM, or the cutting tool does not rotate when free of debris, if the electric brake consistently fails to quickly stop after the switch trigger is released, or if an electric or electronic malfunction occurs, a Makita Authorized Service Center repairs the tool.
They must show yousmooth rotation at Low and High speed settings without green blinking and rapid electric braking when the trigger is released.
In writingthe drive system, switch or electric brake diagnosis and the genuine Makita replacement parts installed.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Release the switch trigger and turn on the main power button without pulling the trigger
- Who:
- you, holding the DUR192L trimmer with both hands clear of cut grass.
- How:
- release the switch trigger, press and hold the main power button until the indicator lamps go off, and then tap the main power button to turn the tool back on without pulling the switch trigger (tapping the main power button toggles between Low mode at 0 to 4,500 min-1 and High mode at 0 to 6,000 min-1). Then depress the lock-off lever and pull the switch trigger.
- Result that matters:
- ruling out a green blink triggered by turning on the main power button while pulling the switch trigger.
- If the indicator lamp stays lit in the selected speed mode and the cutting head spins freely:
- resume trimming without forcing the tool.
- If the cutting attachment is locked or the green blink returns:
- turn the tool off and remove the battery cartridge before cleaning.
- Evidence to keep:
- a note of whether the green blink occurred right at power-on or during heavy trimming.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Turn the tool off, remove the battery cartridge, and clear entangled weeds or branches
- Who:
- you, with the tool switched off and the battery cartridge removed.
- How:
- always turn the tool off by pressing and holding the main power button, remove the battery cartridge (BL1815N, BL1820B, BL1830B, BL1840B, BL1850B, or BL1860B), and wait until the cutting attachment comes to a complete stop without touching moving hazardous parts while it coasts. Remove entangled weeds or any foreign object such as a branch jammed between the guard and the nylon cutting head, and clear cut grass or debris from the cooling air vent.
- Result that matters:
- the nylon cutting head and protector free of tangled weeds or branches and the cooling vent clear.
- If entangled weeds or a jammed branch come out and the tool runs normally once the battery is locked back in:
- the overload was mechanical.
- If no weeds or branches were caught but the cutting tool still fails to rotate or vibrates abnormally:
- proceed to the third check.
- Evidence to keep:
- a photo of the cleared nylon cutting head, guard and cooling air vent.
Always turn the tool off, remove the battery cartridge, and wait until the cutting attachment comes to a complete stop before touching it.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Verify battery seating, battery check lamps, and red overheat or overdischarge states
- Who:
- you, with the tool switched off before checking the cartridge and head.
- How:
- confirm the battery cartridge is inserted all the way until it locks with a little click and the red indicator cannot be seen, then press the check button on the battery cartridge (75% to 100% down to 0% to 25%; the first far-left indicator lamp blinks when the battery protection system works). Also check whether the tool indicator lamp lights solid red (Overheat: let tool and battery cool) or blinks red (Over-discharge: recharge the battery).
- Result that matters:
- confirming proper battery lock and charge and distinguishing overload from overheat or overdischarge.
- If the battery was low or hot and normal operation returns after charging or cooling:
- continue at the rate for which the tool was designed.
- If the motor does not run, fails to reach maximum RPM, or vibrates abnormally with the head firmly tightened:
- ask a Makita Authorized Service Center for repair.
- Evidence to keep:
- the battery cartridge indicator reading and the color and state of the tool indicator lamp.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Garden
- Brand
- Makita
- Product type
- Cordless garden tools
Known code variants
- DUR192L green lamp blinking
- DUR192L indicator lamp blinking in green
- DUR192L luz verde parpadea
- Green lamp blinking
- Indicator lamp starts blinking in green
- La lámpara de indicación comenzará a parpadear en verde
- La lámpara de indicación parpadea en verde
- Makita DUR192L green light blinking
- Makita DUR192L luz verde parpadeando
- Makita overload protection green blink
- Protección contra sobrecarga Makita DUR192L
What it means
Makita instruction manual 885822C994 for the DUR192L cordless grass trimmer (18 V DC) explains that the tool/battery protection system automatically cuts off power to the motor and makes the indicator lamp start blinking in green under Overload protection (whereas a lighted red indicator lamp signals Overheat protection and a blinking red indicator lamp signals Over-discharge protection). Other models may differ, and a green blinking lamp alone never proves that the motor or battery cartridge is faulty.
Warnings and stop conditions
- Highsource verified
If grass, entangled weeds or branches get caught between the cutting attachment and guard, always turn the tool off and remove the battery cartridge before cleaning, and never touch moving hazardous parts before they have come to a complete stop (the cutting attachment continues to rotate for a short period after turning the tool off).
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
- Highsource verified
Never tape down or defeat the lock-off lever, never use the tool without the guard (protector) illustrated in place, and never use metal blades including metal multi-piece pivoting chains and flail blades; if the cutting tool and motor cannot stop, remove the battery immediately and ask your local Makita Authorized Service Center for repair.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Symptoms and causes
Probable causes · in order
- Tool or battery overloaded by entangled weeds or other debrisCommon
In manual 885822C994 for the DUR192L grass trimmer, Makita lists first under Overload protection that the tool or battery is overloaded by entangled weeds or other debris.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
- Cutting tool locked by a jammed branch or foreign objectPossible
The DUR192L manual states that overload protection also stops the tool with a green blinking indicator lamp when the cutting tool is locked, such as when a branch is jammed between the guard and cutting tool.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
- Main power button turned on while the switch trigger is being pulledPossible
Under Overload protection, manual 885822C994 notes that the indicator lamp starts blinking in green and the tool stops if the main power button is turned on while the switch trigger is being pulled.
Evidence: Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Virtual technician
Does Green lamp blinking still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Makita DUR192L Cordless Grass Trimmer Instruction Manual (885822C994)
Makita · 2024 · official_doc
Was this entry useful?