Makita DFT087F Repair Manual page 29

Symptom
Charging lamp on the charger
lights up in red, then
immediately start blinking in
green.
Charging lamp on the charger
blinks in red and green
alternately.
Charging lamp on the charger
blinks in yellow.
Probable Cause
Dust on the contacts of the battery or
the charger.
Connector(s) inside the charger are not
connected.
Lead wire(s) in the charger are broken.
Circuit board of the charger is broken.
Battery is inactive, broken or its service
life has expired.
Dust on the contacts of the battery or
the charger.
Lead wire(s) in the charger are broken.
Circuit board of the charger is broken.
Battery is inactive, broken or its
service life has expired.
Connector(s) in the charger are
disconnected.
Scirocco fan in the charger is broken.
Passage for air-cooling is clogged with
dust. (Air-cooled type batteries only)
29 / 35
Corrective Action
Remove the dust.
Connect it securely.
Check the wire(s) with an ammeter,
and if there is no electric continuity
in them, replace the wire(s).
Replace Circuit board.
Replace Battery.
Remove the dust.
Check the wire(s) with an ammeter,
and if there is no electric continuity
in them, replace the wire(s).
Replace Circuit board.
Replace Battery.
Connect them securely.
Replace Scirocco fan.
Remove dust from air inlet and
outlet on the charger and Battery.