Palfinger 200010121, Manual

Page: 216 / 435

149
Lower
Fault Possible cause Remedy
Platform does not lower,
but can be opened
Lift cylinder is stuck
Briefly press Lift pushbutton,
then press Lower pushbutton
again
Seating too tight Grease all seating points
Output J4/15 or J42/81 does not
deliver output signal Use test lamp to check according
to circuit diagram
Motor contactor -K2 or relay -K7
defective
Check motor contactor and relay
Platform does not come
down when operated
with foot controls
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 proce-
dure
Foot control defective
Disconnect plug connection in
the platform, check foot controls
with continuity tester
Cable no. 2 to platform defective
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 come
down when operated
with lateral operating el-
ement
Rotary switches, pushbuttons, or
toggle switches defective
Use test lamp to check contacts
in operating element according to
circuit diagram, use ground con-
nection JK at PC board
Cable no. 3 to operating element
defective
Actuate rotary switches one after
another and check voltage
across connector J30 according
to circuit diagram using a test
lamp
Platform tilts during
lowering Lift cylinder lowers too slowly or
not at all
Lubricate bearings, briefly actu-
ate Lift pushbutton, then press
Lower pushbutton again
Ground adjustment
(platform tilts)
Fault Possible cause Remedy
Emergency actuation:
Actuate “Open” (28) pushbutton and additional pushbutton (29) on lateral control element un-
til platform tilts
Platform does not tilt
Output J4/15, J4/14, JK or J42/81
does not deliver output signal Use test lamp to check according
to circuit diagram
Seating too tight Grease all seating points
Platform does not tilt,
opt. indicator in driver's
cab flashes rapidly
Tilt sensor b15 guide rod defec-
tive
Replace tilt sensor b15