153
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 with
motor
No signal at output J 1/3
Use test lamp to check ac-
cording to circuit diagram
Motor contactor defective Check motor contactor
Platform does not open
Rotary switches, pushbut-
tons, or toggle switches de-
fective
Use test lamp to check con-
tacts in operating element ac-
cording to circuit diagram,
use ground connection JK at
PC board
No voltage at valve plug S 3
or S 4, defective cable
Check with test lamp
Control valve S 5 or pressure
splitter stuck
Clean or replace
Warning lamps on platform
are not flashing when plat-
form is open
Tilt sensor b15 at the plat-
form misadjusted or defec-
tive
Adjust or replace
PC board defective Replace
Plugs defective Replace
Warning lamps defective Replace
Initiator b25 misadjusted or
defective
Adjust or replace
Extend
Fault Possible cause Remedy
Platform does not extend,
motor is running
Solenoid valves S 7 and S 8
leaking
Clean or replace
Solenoid valve S 8 does not
open
Clean or replace
Lowering brake valve S 11
does not open
Clean or replace
Piston seal in guide cylinder
defective
Replace
Betriebsanleitung_Hubladebuehnen_EN.book Seite 153 Donnerstag, 15. August 2019 4:04 16
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