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30
English
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Storage
▶
Always store this product with the electric supply cable unplugged from the electricity supply.
▶
Store this product in a dry place, where it cannot be accessed by children or unauthorized persons.
▶
Open the water flow regulator before stowing away the product.
▶
At temperatures below the freezing point, make sure that no water remains in the product.
▶
After a long period of storage, always check all visible parts and controls for signs of damage and make
sure that they all function correctly.
10
Troubleshooting
If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by
yourself, please contact
Hilti
Service.
10.1
The diamond core drilling machine is in working order
Malfunction
Possible cause
Action to be taken
The service indicator lights.
The carbon brush wear limit has
almost been reached. The diamond
core drilling machine will continue
to run for a few hours until it shuts
down automatically.
▶
Have the carbon brushes
replaced at the next opportunity.
The diamond core drilling
machine doesn’t achieve full
performance.
Supply network fault – undervolt-
age occurred.
▶
Check whether other power
consumers are disrupting the
power supply from the network
or generator.
▶
Check the length of the
exten-
sion cord used
.
The diamond core bit doesn’t
rotate.
The gear selector isn’t engaged.
▶
Operate the gear selector
until it engages.
The diamond core bit has become
jammed in the base material.
▶
Guide the diamond core drilling
machine in a straight line.
▶
Use an open-end wrench to
release the diamond core bit:
Disconnect the mains plug from
the power outlet. Grip the
diamond core bit with a suitable
open-end wrench close to the
connection end and release the
diamond core bit by rotating it.
The drilling speed is decreas-
ing.
Maximum drilling depth has been
reached.
▶
Remove the core and use a core
bit extension.
The core is stuck in the diamond
core bit.
▶
Remove the core.
Wrong core bit specification for the
base material.
▶
Select a more suitable diamond
core bit specification.
High steel content (indicated by
clear water containing metal cut-
tings).
▶
Select a more suitable diamond
core bit specification.
The diamond core bit is defective.
▶
Check the diamond core bit
for damage and replace it if
necessary.
Wrong gear selected.
▶
Select the right gear.
Contact pressure is too low.
▶
Increase the contact pressure.
The machine has too little power.
▶
Select the next lower gear.
The diamond core bit is polished.
▶
Sharpen the diamond core bit
by drilling into a sharpening
plate.
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