C
−
LRV lift control valve
Operation
300−I−9010212−E−10/08.08
Page (Chapter)
Corrective action
Cause
Fault
S
Hydraulic line to the
cylinder is too small
S
Fit larger line
S
Oil is too cold
S
Use multigrade oil
S
Install oil heater
S
Provide parking circuitry
S
Too much friction in
system
S
Align cylinder and rails
Car overshoots landing
during DOWN travel
S
Deceleration switches
wrongly positioned
S
Set as per page(s)
S
Safety relay R1 drops out
too early, or without a
delay
S
Set as per page(s)
Car overshoots landing
during DOWN travel
S
Deceleration time too
short
S
Increase deceleration in
C−DELCON
S
Deceleration switches in
shaft wrongly positioned
S
Set as per page(s)
S
Feedback sensor (Hall
sensor) GND not
connected
S
Connect GND to terminal
12
S
Demand values set too
high
S
Set as per page(s)
S
DOWN pilot valve
contaminated
S
Clean pilot valve
S
Oil is too cold
S
Consider installing oil
heater; providing parking
circuitry
Leakage in hydraulic
system (test only when
oil is cold)
S
Pressure drop in approx.
3 minutes is not more
than 5bar (with ball valve
closed)
S
None, valve is leak−tight!