8
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Check whether the plug is inserted properly and the outlet has power.
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Check if the carbon brush is damaged or worn out.
Inspect method: open the carbon brush cover and use an insulated rod to gently press the brush. If the
screwdriver resumes rotating, the carbon brush has reached the end of its service life and must be replaced
immediately.
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Check that the switches are working properly.
If the screwdriver is not rotating normally
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There is a protective circuit within the power supply. Please wait 3 to 5 seconds after turning on the power
supply and the indicator light turn green.
-
If the motor runs intermittently during “Forward” operation, try “Reverse” operation, or rotate the bit shaft
90 degrees until a “click” sound is heard, then re-attempt “Forward” operation.
-
Long-term usage causes the motor’s commutator to wear down. In this case, it must be replaced. (Please
contact our customer service)
If the bit falls out easily or wobbles
- Check that the bit matches our specifications. If not, change the bit to one that does.
- Check that the bit is inserted tightly into two guide channels within the bit shaft. If not, remove the bit and
re-insert it tightly.
- If the bit tends to wobble, remove the bit, rotate it 60 or 180 degrees and re-insert it.
If the screwdriver doesn’t stop when the selected torque is reached
-
Excessive torque setting can cause the screw to strip threads, as a result the clutch will not activate.
-
Make sure the correct size bit is chosen for the application.
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The brake circuit or the sensor may be damaged and needs repair. (Please contact our customer service)
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8. After Use
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Storage and maintenance: when the unit is to be stored for a long period, remove the power supply and bit,
open the carbon brush cover and blow out any accumulated carbon brush dust with compressed air, and
wipe the exterior clean. Store the screwdriver carefully in a dry, dust-free place away from direct sunlight.
Store the bit in grease. To ensure continued serviceability, periodically check and maintain the screwdriver.
American Hakko Products, Inc.
28920 Avenue Williams
Valencia, CA 91355
1-(800)88-HAKKO(42556)
www.HakkoUSA.com
Rev 2017.11
