C
−
LRV lift control valve
Operation
300−I−9010212−E−10/08.08
Page (Chapter)
Corrective action
Cause
Fault
S
Mechanical null point is
displaced
S
Check
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
S
Mechanical null point is
displaced
S
Check
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
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
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
