157
Lift platform off the ground
(platform tilts into the horizontal operating position that was stored when it
was opened)
Fault Possible cause Remedy
Platform does not tilt
into the horizontal oper-
ating position when op-
erated via foot controls
The foot controls were actuated
too fast (shorter than 1 s) or too
slow (longer than 3 s) after each
other
Release both foot controls, wait
a few seconds, and repeat pro-
cedure
Foot control defective
Disconnect plug connection in
the platform, check foot con-
trols with continuity tester
Cable no. 2 to platform defec-
tive
Actuate both foot controls and
check the voltage at plugs J 3/6
and J 3/5 on the PC board using
a test lamp
Platform does not tilt
into the horizontal posi-
tion when lifting
Directional valve S 5 stuck or
defective
Clean or replace
Tilt sensor b15 defective Replace
Platform tilts further
than the preset angle
Tilt sensor b15 defective Replace
Directional valve S 5 stuck or
defective
Clean or replace
Platform does not tilt
into the horizontal oper-
ating position but is
lifted
PC board does not deliver out-
put at J 1/12
Check plug J 1 terminal 12 with
test lamp, use ground connec-
tion JK of the PC board
Valve S 5 in unit does not
switch on
Check with test lamp
Platform does not tilt
into the horizontal oper-
ating position, but is
lifted, optical indicator
in driver's cab flashes
rapidly
Tilt sensor b15 platform defec-
tive
Replace tilt sensor b15
Platform tilts further
than the preset angle
when the platform is
lifted
Tilt sensor b15 defective Replace
Directional valve stuck or defec-
tive
Clean or replace
Betriebsanleitung_Hubladebuehnen_EN.book Seite 157 Donnerstag, 15. August 2019 4:04 16
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