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C
−
LRV lift control valve
Operation
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
S
Electrics − control cabinet
S
Motor running on 2
phases
S
Motor− and/or oil−PTC
thermistor has operated
S
Check power supply
S
Electronic soft−starter not
connected properly
S
Connect in accordance
with diagram
S
UP solenoid not
energised
S
Check solenoid output
and R2
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
S
DOWN solenoid is
energised
S
Correct the wiring fault
S
NTA−2, terminals 7+8
crossed?
S
UP pilot filter dirty
S
Clean filter. If necessary,
filter oil
Car does not reach
speed
S
Pressure−relief valve set
too low
S
Check pressures/consult
factory
Cannot lift maximum load
S
Pressure−relief valve set
too low
S
Check pressures/consult
factory
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
S
Travels UP without any
command
S
Bypass−pressure
setscrew
Á
on the valve
is set too high. Reset it.
Car does not reach
storey
S
Oil level in power unit is
below minimum
S
Top−up when car is at
lowest landing
S
Leakage: valve − cylinder
S
Check for leakage