JLG G12-55A AccuPlace Service Manual - Manual (Page 223)

9.105 G10-55A & G12-55A AccuPlace
Electrical System
WRONG FORK
RESPONSE 8473 Controls determine motion
direction opposite the
commanded direction for
more than 1 second. Not
reported if cab joystick is not
commanding motion. Y Fault may indicate improper electrical or
hydraulic connections after a repair.
Cycle power to see if fault clears.
If fault still exists after motion is
commanded, check connections and
integrity of Fork Position sensor.
FORK POSITION
SENSOR –
EEPROM FAULT 8474 Fault indicates that the Fork
Position sensor has
observed an internal error
with its stored memory. Y Cycle power to see if fault clears.
FORK POSITION
SENSOR –
MAGNET NOT
DETECTED
FAULT 8475 Fault indicates that the Fork
Position sensor can not
detect the presence of its
positioning magnet. This
may occur if the magnet
inside the cylinder has been
damaged. Y Cycle power to see if fault clears.
Move forks through range, cycling power
periodically, to determine whether sensor
can detect magnet at any cylinder
position.
FORK POSITION
SENSOR –
MULTIPLE
MAGNETS 8476 Fault indicates that the Fork
Position sensor is having
problems with the sensing of
its positioning magnet. This
may occur if the magnet
inside the cylinder has been
damaged. Y Cycle power to see if fault clears.
Move forks through range, cycling power
periodically, to determine whether sensor
can properly detect a single magnet at any
cylinder position.
FORK POSITION
SENSOR –
MAGNET BELOW
WORKING LIMIT 8477 Fault indicates that the
positioning magnet of the
Fork Position sensor is near
the low limit of its linear
sensing range. Y Cycle power to see if fault clears.
This fault may be exhibited on rare
occasions when exchanging carriages.
FORK POSITION
SENSOR –
MAGNET ABOVE
WORKING LIMIT 8478 Fault indicates that the
positioning magnet of the
Fork Position sensor is near
the high limit of its linear
sensing range. Y Cycle power to see if fault clears.
FORK POSITION
SENSOR –
MAGNET BELOW
LOWEST
WORKING LIMIT 8479 Fault indicates that the
positioning magnet of the
Fork Position sensor is
outside of its linear sensing
range. Y Cycle power to see if fault clears.
Move forks through range, cycling power
periodically, to determine whether sensor
can properly detect position magnet at any
cylinder position.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)