Genie Z-30/20N Service Manual page 47

April 2005
REV B
3 Locate the diode between the black/red wire
from the boom function speed controller and the
white/red wire. Disconnect the white/red wire
from the diode on the black/red wire.
4 Connect the negative lead from a multi-meter
set to measure amperage to the wire connector
of the white/red wire. Connect the positive lead
of the multi-meter to the diode on the black/red
wire.
5 Turn the boom function speed controller to the
position.
CREEP
6 Set the threshold: Press down the foot switch
and move the primary boom toggle switch to
the up position. Adjust the amperage to 0.28A.
Turn the threshold trimpot adjustment screw
clockwise to increase the amperage or
counterclockwise to decrease the amperage.
7 Turn the boom function speed controller to
the 9 position.
8 Set the max out: Press down the foot switch
and move the primary boom toggle switch to
the down position. Adjust the amperage
to 0.65A. Turn the max out trimpot adjustment
screw clockwise to increase the amperage or
counterclockwise to decrease the amperage.
9 Start a timer and simultaneously press down
the foot switch and move the primary boom
toggle switch in the down direction. Note how
long it takes to reach 0.65A.
Part No. 106373
10 Set the ramp rate: Turn the ramp rate trimpot to
obtain a 2 second delay from 0 to 0.65A. Turn
the trimpot clockwise to increase the time or
counterclockwise to decrease the time.
11 Disconnect the leads from the multi-meter and
connect the white/red wire to the diode on the
black/red wire.
Boom function speed
controller specifications
Threshold
(controller turned to
Max out
(controller turned to 9)
Ramp rate
Genie Z-30/20N
Section 4 • Repair Procedures
PLATFORM CONTROLS
)
CREEP
0.28A
0.65A
2 seconds
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