KaVo 2052 CHC Instructions For Use Manual page 34

Troubleshooting
▶ The medical device is too hot while idling:
Check the amount of cooling air.
▶ The medical device is too hot while working:
Caring for the medical device.
▶ When the speed drops or is uneven:
Caring for the medical device.
▶ An O-ring is missing on the motor coupling:
Replace O-ring.
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