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Question/Problem - Cause
Causa
The motor does not start :
• The power cord is unplugged or damaged;
• "ON/OFF" switch electrical contacts are not in good
condition or it does not work ;
• Rotor or stator windings are damaged;
• Short-circuited rotor windings.
The
motor
makes
intermittently or runs slowly :
• "ON/OFF" switch contacts are damaged;
• Mechanical parts are blocked/clogged ;
• The rotary hammer is running over excessive
pressure, overloaded motor;
• The carbon brushes are worn out.
The chuck overheats :
• Lack of grease inside the chuck .
Body overheats:
• Overloaded machine;
• Incorrect housing or parts assembly inside the rotary
hammer;
• Faulty power supply;
Sparks around the rotor :
• The carbon brushes are worn out ;
• Short-circuited stator or rotor.
an
abnormal
sound,
Solution
• Plug in or repair the power cord;
• Repair or replace the switch ;
• Call technical assistance;
• Call technical assistance.
starts
• Repair or replace the switch;
• Inspect the mechanical parts;
• Reduce the pressure applied ;
• Replace the carbon brushes.
• Put grease into the fixing grooves of the drilling/impact
accessory ;
• Reduce working pressure;
• Check if there is any blockage or part touching the
rotor;
• Check the supply voltage and adjust it according to the
technical data ;
• Replace the carbon brushes;
• Call technical assistance.
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