KARAT
®
180
US
OPERATING MANUAL KARAT® 180
11
MAINTENANCE AND CARE
Always keep the machine and cooling air vents
free and clean. It must always be kept in a dry,
frost-free place.
TROUBLESHOOTING
For malfunctions that are not specified in this
chapter, when in doubt or when explicitly indi-
cated, seek assistance from an authorized service
facility.
Problem
Possible cause
Possible solution
The motor doesn’t work .
Defective cable of plug .
Defective switch .
The carbon brushes of the machine
are worn .
Defective motor .
PRCD protective switch is not
switched on, test!
Have inspected by a electrical
specialist and replaced if necessary .
Contact customer service .
Contact customer service .
Contact customer service . Never
repair the motor yourself . Danger!
Motor makes too much noise .
Damaged windings .
The carbon brushes of the machine
are almost worn .
Have the motor inspected by
customer service .
Motor mildly overheats .
Motor overload .
Motor doesn’t cool sufficiently
Prevent motor overload when drilling .
Remove the dust from the motor, so
that the cool air can flow .
Motor runs . Core bit doesn’t
rotate .
Gearing defective .
Have the machine inspected by the
service facility .
Rate of drilling progress
decreases .
Core bit segments polished .
Water pressure/water flow rate too
high .
The core is stuck in the core bit .
Maximum drilling depth reached .
Core bit defective .
Gearing defective .
The clutch is releasing prematurely
or slipping .
Sharpen the core bit on a sharpening
plate while water is flowing .
Use the feed lever to reduce the water
flow rate .
Remove the core .
Remove the core and use a core bit
extension .
Check the core bit for damage and
replace if necessary .
Have the machine repaired at a
service center .
Have the machine repaired at a
service center .
Motor cuts out .
The core bit has been jammed for
too long .
Electric power failure .
Too low power supply .
Electronics defective .
Free the core bit . Switch the motor off
and then on again .
Check the plug connections, electric
power supply and PRCD protective
switch .
Check power supply .
Too long/thin extension cord .
Too small aggregate .
Have the machine repaired at a
service center .
Water leakage at the water swivel
or gear housing .
Shaft seal defective .
Water pressure is too high .
Have the machine repaired at a
service center .
Reduce the water pressure .
