25
Check Problem
Possible cause
Solution / action required
8
LP30 does not
– Loose cable or cables at the
– Consult an electrical specialist
start
circuit breaker / fuses in the
– Check and tighten cable terminals
LP 30 electrobox
9
LP30 does not
start
– Hydraulic unit has overheated
– Allow the hydraulic unit to cool
13.2 Other malfunctions
Check Problem
Possible cause
Solution / action required
10
LP30 starts but
– Hydraulic couplings not fully
– Check the hydraulic hoses,
the saw head
connected
check and engage couplings
does not react or
– The belt drive from the electric
– Unscrew bottom cover, check
does not react
motor to the pump is defective
drive belt and replace if
correctly
necessary (Hilti specialist)
11
LP 30 starts but
– Electro-hydraulic switching
– Unscrew LP 30 front cover
the saw head
valve(s) sticking
(Hilti specialist)
does not react or
– Check the electric plug
does not react
connections to the 3 valves
correctly
– Test / move the slider – may be
sticking due to dirt
12
230 V socket on
– 3-phase mains supply has no
– Depending on jobsite, take a 5-core
LP 30 does not
neutral conductor
cable
function
– Extension cable has only 4 cores
– Use a separate 230 V extension
(3 phases and earth)
cable
13
Glass fuse blown
– Switch-on surge, current too
– Replace the glass fuse (5)
high for the fuse
14
Hydraulic unit
– Extension cable too long and / or
– Use extension cable with suitable core
becomes hot
core cross section inadequate
cross section (see table on page 11)
15
Oil leaks from
– Oil escapes at the oil level sight
– Oil level too high or LP 30 standing
hydraulic unit
glass / vent tube
or hanging at an angle
–
Reduce blade motor speed (r.p.m.)
slowly and switch off
16
Water in oil,
– Oil seals in saw head defective
– Check at the vent or by opening the
visible when oil
oil drainage screw
(at sight glass)
¡
Oil clear = OK
has milky white
¡
Oil white = DANGER, unit must be
appearance
serviced immediately
