99
9
9
8
9
Device
Description
Cause and solution/help
Handpiece
Storage battery is char-
ged but motor does not
run.
• Reconnect the connecting cable to the control unit
• Motor cable is faulty; replace motor cable
• Motor is faulty; send in to joke for repair
• Collet on the rapid-chuck handpiece open; close collet
Motor stops every
2 to 3 seconds or does
not run at full power
• Storage battery faulty; replace battery
Storage is charged, but
motor does not run or
keeps stopping
• Storage battery faulty; replace battery
• Motor cable is not properly connected; connect cable
Battery
Storage battery is not
recharged or storage
battery is charged but
motor does not run
• Power supply unit cable is faulty; replace cable
• No power supply unit cable connection; check connection
• Speed controller is faulty; replace controller
• Not a standard charger/power supply unit; only use an origi-
nal power supply unit/charger
Troubleshooting
Care and maintenance
Control unit
The control unit is maintenance-free. Only clean it with a dry, soft cloth.
Handpiece
Pay attention to cleanliness of the thread turns when changing the handpiece.
Clean the contact surface when changing the tool.
Pay attention to utmost cleanliness when changing the collet and only use the keys provided.
Motor
All the micromotor bearings are encapsulated and lubricated for life.
