Bucher C-LRV 700 - 5.3 Faults and Fault-finding

C−LRV lift control valve Operation
80/92
300−I−9010212−E−10/08.08
5.3 Faults / Fault−finding
5.3.1 Check list for fault correction
Fault Cause Corrective action Page (Chapter)
No UP travel S Motor / pump not running S Check connection
S Wiring fault S Check wiring 49 (4.2.3)
S Electrics − control cabinet
S Motor running on 2
phases
S Motor− and/or oil−PTC
thermistor has operated
S Check power supply 49 (4.2.3)
S Electronic soft−starter not
connected properly
S Connect in accordance
with diagram
S UP solenoid not
energised
S Check solenoid output
and R2
49 (4.2.3)
S Contacts K1/K2 and/or
R2 not closed
S Check connections after
power supply unit
S Check control of power
supply unit
S SIU (demand/feedback
monitoring) is actuated,
LED SIU−1" on C−DEL-
CON lights up
S Check mechanical null
point
60 (4.3.10)
S DOWN solenoid is
energised
S Correct the wiring fault
S NTA−2, terminals 7+8
crossed?
49 (4.2.3)
S UP pilot filter dirty S Clean filter. If necessary,
filter oil
61 (4.3.11)
Car does not reach
speed
S Pressure−relief valve set
too low
S Check pressures/consult
factory
56 (4.3.4)
Cannot lift maximum load S Pressure−relief valve set
too low
S Check pressures/consult
factory
56 (4.3.4)
S Overload switch DZ has
activated
S Reduce the load
S Leakage between pump
and valve
S Eliminate the leakage
UP−travel starting
problems
S Jolt when starting S Reset bypass−pressure
setscrew Á on the valve
53 (4.3.3)
S Travels UP without any
command
S Bypass−pressure
setscrew Á on the valve
is set too high. Reset it.
53 (4.3.3)
Car does not reach
storey
S Oil level in power unit is
below minimum
S Top−up when car is at
lowest landing
52 (4.3.2)
S Leakage: valve − cylinder S Check for leakage