Test The Down Limit Switch, Level Sensor And Pothole Limit Switches; And Gs-47 - Genie GS-1530 Maintenance Manual

September 2016
Q-20 T est the D ow n Limit Swi tch, Lev el Sens or and Pothole Limit Switches - GS- 30, GS- 32, GS-46 and GS- 47
Q-20
Test the Down Limit Switch, Level
Sensor and Pothole Limit
Switches - GS-30, GS-32,
GS-46 and GS-47
Genie specifications require that this procedure be
performed quarterly.
Maintaining the limit switches is essential to safe
operation and good machine performance.
Operating the machine with a faulty limit switch
could result in reduced machine performance and a
potentially unsafe operating condition.
Note: Perform this procedure with the machine on
a firm, level surface that is free of obstructions.
1 Remove the platform controls from the
platform.
2 Raise the platform 7 to 8 feet / 2.1 to 2.4 m.
3 Lift the safety arm, move it to the center of the
scissor arm and rotate down to a vertical
position.
4 Lower the platform onto the safety arm.
Crushing hazard. Keep hands
clear of the safety arm when
lowering the platform.
5 Turn the selector/key switch to the off position.
6 Tag and disconnect the platform control box at
the platform.
7 Follow the platform control cable down the
scissor stack to the alarm bracket on the
chassis deck. Tag and disconnect the platform
control cable from the GCON power control
harness at the 6-pin Deutsch connector.
8 Securely install the platform control box
harness plug into the 6-pin Deutsch connector
of the GCON power control harness.
Part No. 1272215
Quarterly Maintenance Procedures
Down Limit Switch
9 Disable the down limit switch. Loosen the
fastener securing the roller arm to the limit
switch, and rotate the roller arm 90 degrees in
a downwards direction. Do not activate the
switch contacts.
10 Turn the selector/key switch to platform
control.
11 Raise the platform and return the safety arm to
the stowed position.
12 Working at the platform controls, lower the
platform to the stowed position.
Result: The ground controls LCD displays
"PHS: POTHOLE GUARDS STUCK" and the
platform controls LED displays "PHS". The
alarm sounds and the lift function operates.
The machine is functioning properly. Refer to
the Operation Indicator Codes below.
Result: The ground controls LCD does not
display "PHS: POTHOLE GUARDS STUCK"
and the platform controls LED does not
display "PHS". The alarm does not sound and
the lift function does not operate. Replace the
down limit switch.
Scissor Lifts
Maintenance Manual
LCD display
LED display
45