DeWalt 20V MAX DCN890 Instruction Manual page 79

Many common problems can be solved easily by utilizing the chart below. For more serious or persistent problems,
WARNING: To reduce the risk of serious personal injury, ALWAYS disconnect battery pack from tool before
all repairs
SYMPTOM
Motor does not run with contact
trip depressed
Tool does not actuate (motor runs
but will not fire)
Motor starts up but generates a
lot of noise
Driver blade continues to get stuck
in down position
TROUBLESHOOTING GUIDE
contact a D WALT service center or call 1-(800)-4-D
E
CAUSE
Trigger lock in locked position
Dryfire lock out engaged, blocking contact trip from
traveling fully
Tool is stalled, locking the motor from rotating
Battery is hot. (Check LED indicator to verify these
conditions.)
Tool is hot. (Check LED indicator to verify these
conditions.)
Bent contact trip
Motor stops running after 5 seconds
Terminals are dirty or damaged
Damaged internal electronics
Damaged Trigger
Battery is hot
Tool is hot
Dryfire lock out engaged, blocking contact trip from
traveling fully
Low battery charge or damaged battery
Jammed nail/drive blade not returned to home
position
Damaged driver
Jammed internal mechanism
Damaged internal electronics
Jammed pin and driver is stuck in down position
Damaged driver
Jammed pin and driver is stuck in down position
Debris in nosepiece
Damaged or worn driver
WALT.
E
FIX
Unlock trigger lock.
Load more pins into magazine.
Rotate the stall release lever on the tool and the mechanism
will release. If driver does not return, remove battery and
manually push driver back to home position.
Let the battery cool or replace it with a cool pack.
Let the tool cool down before continuing use.
See authorized service center.
Normal operation, release contact trip and redepress.
See authorized service center.
See authorized service center.
See authorized service center.
Let the battery cool or replace it with a cool pack.
Let the tool cool down before continuing use.
Load pins into magazine.
Check charge level if pack shows state-of-charge. Charge or
replace battery pack if necessary.
Remove battery, clear jammed nail, cycle stall release lever,
(push driver up manually if necessary) reinsert battery pack.
Replace driver with kit.
See authorized service center.
See authorized service center.
Use stall release lever, clear and jammed pins, and return
driver manually if necessary.
Replace driver with kit.
Use stall release lever, clear any jammed pins, and return
driver manually if necessary.
Clean nose area and watch closely for small pieces of broken
pins stuck in the track. Refer to Clearing a Jammed Pin.
Replace driver with kit.
ENGLISH
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