Troubleshooting - Hilti DD 200 Mode D'emploi

9. Troubleshooting

Fault Possible cause
The machine Fault in the electric supply
doesn't start
Supply cord or plug defective
Switch defective
Machine switched off by the automatic
cut-out carbon brushes
The motor runs Gearing defective
but the core bit
doesn't rotate Gear selector switch not engaged
Rate of drilling Water pressure / water flow rate too high
progress decreases
Core sticks inside the diamond core bit
Maximum drilling depth reached
Diamond core bit defective
Gearing defective
Diamond core bit segments polished
Diamond core bit segments polished
The slip clutch releases prematurely or
slips permanently
The motor cuts out The machine stops running
Electronics defective
Electric power failure
Cooling fan defective
Carbon brushes worn
Water leakage at Shaft seal defective
the water swivel or
gear housing Water pressure too high
The diamond core Chuck or connection end dirty or damaged Clean the connection end / chuck or replace if
bit cannot be fitted
into the chuck
Water leakage at Chuck or connection end dirty
the chuck during
operation Core bit not screwed securely into the
chuck
Chuck seal or core bit connection end
defective
Printed: 21.10.2015 | Doc-Nr: PUB / 5069597 / 000 / 04
Remedy
Plug in another electric appliance and check
whether it works. Check the plug connections,
electric supply, PRCD and mains fuse.
Have it checked by a trained electrical
specialist and replaced if necessary.
Have it checked by a trained electrical
specialist and replaced if necessary.
Have it checked by a trained electrical
specialist and replaced if necessary.
Have the machine repaired at a Hilti service
center.
Move the gear selector switch until it is felt to
engage.
Reduce the flow with the water flow
regulator.
Remove the core.
Remove the core and use a core bit
extension.
Check the core bit for damage and replace it
if necessary.
Have the machine repaired at a Hilti service
center.
Sharpen the core bit on a sharpening plate
with water running.
The wrong core bit specification has been
used. Seek advice from Hilti.
Have the machine repaired at a Hilti service
center.
Reduce the pressure applied.
Have the machine repaired at a Hilti service
center.
Check the plug connections, electric supply,
PRCD and mains fuse.
Have the machine repaired at a Hilti service
center.
Have the machine repaired at a Hilti service
center.
Have the machine repaired at a Hilti service
center.
Reduce the water pressure.
necessary.
Clean the connection end / chuck.n
Tighten it securely.
Check the seal and replace it if necessary.
en
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