Symptoms |
Possible cause |
Remedy |
The machine doesn't start. |
Fault in the electric supply. |
Plug in another electric appliance and check whether it works. Check the plug connections, electric supply and mains fuse. |
Supply cord or plug is defective. |
Have it checked by a trained electrical specialist and replaced if necessary. |
Switch is defective. |
Have it checked by a trained electrical specialist and replaced if necessary. |
Armature or field coil is burned. |
Have it checked by a trained electrical specialist and replaced if necessary. |
The motor runs but the core bit doesn't rotate. |
Gearing is defective or wearing. |
Have the machine repaired or checked. |
Rate of drilling progress decreases. |
Water press/water flow rate is too high. |
Reduce the flow with the water flow regulator. |
Core sticks inside the diamond core bit. |
Remove the core. |