Genie Z-30/20N Service Manual page 39

April 2005
REV B
Determine the limit switch trigger point:
4 Gently move the platform up and down by hand,
so it bounces approximately 2.5 to 5 cm. Allow
the platform to settle.
Result: The overload indicator light and the
alarm are on. Slowly tighten the load spring
adjustment nut by turning it clockwise just until
the overload indicator light and alarm turns off.
The platform will need to be
moved up and down and allowed
to settle in between adjustments.
There may be an approximate 2
second delay before the overload
indicator light turns on and the
alarm sounds.
Result: The overload indicator light and
alarm are off. Slowly loosen the load spring
adjustment nut by turning it counterclockwise
just until the overload indicator light and alarm
turn on. Then slowly tighten the load spring
adjustment nut by turning it clockwise just until
the overload indicator light and alarm turn off.
There may be an approximate 2
second delay before the overload
indicator light turns on and the
alarm sounds.
The platform will need to be
moved up and down and allowed
to settle in between adjustments.
Part No. 106373
Section 3 • Scheduled Maintenance Procedures
Confirm the setting:
5 Turn the key switch to platform control.
6 Lift the test weight off the platform floor using a
suitable lifting device.
7 Place the test weight back onto the center of
the platform floor using a suitable lifting device.
Result: The alarm should be off. The platform
overload indicator light should be off at both the
ground and platform controls.
8 Add an additional 10 lb / 4.5 kg test weight to
the original test weight to overload the platform.
Result: The alarm should be sounding.
The platform overload indicator light should be
flashing at both the ground and platform
controls.
9 Test all machine functions from the platform
controls.
Result: All platform control functions should not
operate.
10 Turn the key switch to ground control.
11 Test all machine functions from the ground
controls.
Result: All ground control functions should not
operate.
Genie Z-30/20N
CHECKLIST D PROCEDURES
There may be an approximate 2
second delay before the overload
indicator light and alarm turn off.
There may be an approximate 2
second delay before the overload
indicator light turns on and the
alarm sounds.
If the platform overload system is
not operating properly, repeat
steps 1 through 4.
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