164
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
LED on PC board does
not flash
Fuses in unit e1 or e2 have
tripped
Replace fuses
PC board in sealing cover defec-
tive
Replace PC board
Open
(platform opens until reaching operating position)
Fault Possible cause Remedy
Platform does not open
with motor
Output J1/3 does not deliver out-
put signal
Use test lamp to check accord-
ing to circuit diagram
Motor contactor defective Check motor contactor
Platform does not open
Pushbutton defective
Use test lamp to check contacts
in operating element according
to circuit diagram, use ground
connection JK at PC board
No voltage at valve plug S4 or
S5, defective cable
Check with test lamp
Control valve S6 or pressure
valve locked
Clean or replace
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 are defective Replace
Betriebsanleitung_Hubladebuehnen_EN.book Seite 164 Donnerstag, 15. August 2019 4:04 16