Bucher C-LRV 700 - Page 81

C−LRV lift control valve Operation
81/92
300−I−9010212−E−10/08.08
Page (Chapter)Corrective actionCauseFault
S Mechanical null point is
displaced
S Check 60 (4.3.10)
S Plunger cylinder is at
end−stop
S Cylinder pillar is too short
S Check cylinder stroke
S Extension of telescopic
cylinder is not
synchronised
S Check cylinder stroke
S Telescopic cylinder is
sitting too low; raise it
S Ratio of top− to
bottom−overtravel is
wrong
S 2−stage:
1
/
2
bottom /
1
/
2
top
S 3−stage:
1
/
3
bottom /
2
/
3
top
See document
300−P−9010023
Car overshoots landing
during UP travel
S Deceleration switches
wrongly positioned
S Position correctly 58 (4.3.8)
S Mechanical null point is
displaced
S Check 60 (4.3.10)
S Deceleration time is too
short
S Increase deceleration in
C−DELCON
S Bypass pressure set too
high
S Reset it
No DOWN travel S Car overloaded, pressure
switch has activated
S Reduce the load
S Contacts K3/K4 and/or
R1 not closed
S Check the safety relay
S No current from power
supply unit
S Test the voltage;
exchange unit
49 (4.2.3)
S UP solenoid is energised S Correct the wiring fault
S Exchange solenoid plug
on valve
S DOWN solenoid not
energised
S Check voltage at terminal
7
S Check connection from
terminal 7 to DOWN
solenoid (safety relay R1)
Lift starts DOWN, then
stops
S SIU (demand/feedback
monitoring) is actuated,
LED SIU−1" on C−DEL-
CON lights up
S C−DELCON settings are
too low
S Acceleration is too high S Decrease the
acceleration setting
S Fast DOWN set too high
in C−DELCON
S Reduce Fast DOWN 79 (5.2)
S Flow rating of
pipe−rupture valve too low
S Reduce Fast DOWN
DOWN speed is too slow S Car is too light S Add weight to the car