Platform Down Function Inoperative - Rev A - Genie GS-2046 Service Manual

Section 5 • Troubleshooting Flow Charts
Chart 7
Platform Down
Function
Inoperative
Be sure all other
functions operate
normally.
Be sure the circuit
breaker and fuse are
not tripped or blown.
Be sure the batteries
are fully charged and
properly connected.
5 - 12
With the key switch
turned to platform
controls and both
Emergency Stop buttons
pulled out to the on
position and the platform
raised slightly,
From serial number
17408 to 21262: press
and hold the lift function
light is
enable button and
on
activate the controller in
the direction and
DOWN
check to see if the error
indicator light is on.
After serial number
21262: press the lift
function select button
and activate the
controller in the
DOWN
direction and check to
see if the error indicator
light is on.
light is not on
Replace the platform
controls OR replace the
ECM U5 OR consult the
Genie Industries Service
Department.
Genie GS-2046 and GS-2646 and GS-3246
With the platform raised
and the safety arm
installed, connect the
leads of a volt meter to
the wires on the platform
0V
lowering coil (item D) on
the cylinder without
removing the wires.
From serial number
17408 to 21262:
Press and hold the lift
function enable button
and activate the
controller in the
DOWN
direction and check the
voltage.
After serial number
21262: Press the lift
function select button
and activate the
controller in the
DOWN
direction and check the
voltage.
20V or more
0 or
Label and disconnect
infinite
the wires from the coil
ohms
on the platform lowering
valve (item D) at the
platform lift cylinder and
check the resistance
(See Repair Section).
23 to 25 ohms
platform
With the platform raised
lowers
and the safety arm
removed, pull the
manual platform
lowering handle at the
ground controls.
platform does
not lower
Are there mechanical
no
restrictions keeping the
platform from lowering?
yes
Remove mechanical
restrictions keeping the
platform from lowering.
June 2003
REV A
Repair open in the WH
B6-down coil wire from
the platform lowering
valve coil (item D) to the
ECM U5 OR repair open
in the brown ground wire
circuit from the coil to
the battery module tray
OR replace U5 OR
consult the Genie
Industries Service
Department.
Replace platform
lowering valve coil
(item D).
Repair or replace the
platform lowering valve
cartridge (item D).
Repair or replace the
platform lowering valve
cartridge (item D) OR
repair or replace the lift
cylinder OR replace the
orifice or orifice washer
(item E) OR consult the
Genie Industries Service
Department.
Part No. 72972