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