Machine Will Not Lower - Up Function Operates - Genie DPL-25S Service Manual

Section 5 - Troubleshooting Flow Charts
Chart 8
Machine Will
Not Lower -
Up Function
Operates
5 - 20
While pushing in the
12V DC
control activate switch
and activating the down
function, hold both
switches and check for
power at the N.C. down
valve coils at the barrel
end of the lifting
cylinders. Put Pos. lead
of the voltage meter on
the yellow wire and Neg.
lead on the green/yellow
grounding wire.
0V DC
Repeat the test but
relocate the Neg. lead of
the voltage meter at the
12V DC
ground terminal 10
(green/yellow wire) of the
13 pole terminal strip (J1)
in the ground control box.
0V DC
Check the voltage at
terminal 3 on the down
0V DC
N.O. contact block
located in the platform
control box.
12V DC
Continued on the next
page.
DPL-25S • DPL-30S • DPL-35S Super Series
Check the resistance of infinite
the N.C. down valve ohms
coils.
7 ohms
platform
Pull the manual lowering
lowers
lever (red handle) located
on the base.
platform will not lower
One or both flow control
valves at the barrel end
of the lifting cylinders are
possibly contaminated.
Consult Genie Industries
Service Department.
Check for a loose
connection at the
grounding stud in the
ground control box OR
check for a bad pin
connection at the quick
disconnect under the
base control box OR
replace 18/7 cable
because of an open
circuit in the green/yellow
grounding wire.
Replace the red jumper
wire because of an open
circuit.
September 2016
Replace the coil because
of an open circuit.
One or both of the N.C.
down valves are
damaged or possibly
contaminated. Consult
Genie Industries Service
Department.
Part No. 40462