160
Troubleshooting Tables
Before switching on
Fault Possible cause Remedy
Optical indication in
driver's cab flashes
rapidly
Tilt sensor b15 defective Replace tilt sensor b15
Switching on
(LED on PC board flashes with the same rate as the turn signal)
Fault Possible cause Remedy
Optical indication in
driver's cab flashes fu-
riously
Lift arms switch b13 defective
(short-circuit)
Replace tilt sensor b15
Tilt sensor b15 guide rod defec-
tive
Replace tilt sensor b15
LED on PC board does
not flash
ON/OFF switch in driver's cab
defective
Check connections 2 and 4 with
test lamp
Fuses in power unit e1 or e2
have tripped
Replace fuses
PC board in sealing cover defec-
tive
Replace PC board
Open
(Platform opens to the horizontal operating position – this position is stored
and moved to after the ground adjustment during lifting)
Fault Possible cause Remedy
Platform does not open
Rotary switches, pushbuttons,
or toggle switches defective
Use test lamp to check contacts
in operating element according
to circuit diagram, use ground
connection JK at PC board
Motor contactor -K4 or relay -K5
defective
Check motor contactor and relay
Output J4/14, JK or J43/90 does
not deliver output signal
Use test lamp to check accord-
ing to circuit diagram
Warning lights on plat-
form are not flashing
when platform is open
Tilt sensor b15 at the platform
misadjusted or defective
Adjust or replace
PC board defective Replace
Plugs defective Replace
Warning lamps defective Replace
Betriebsanleitung_Hubladebuehnen_EN.book Seite 160 Donnerstag, 15. August 2019 4:04 16
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