C
• Ball bearing faulty owing to wear or
soiling.
R
• Check ball bearing and if necessary
replace.
(see A 6.2)
C
• Prolonged operation under very high
load.
R
• Eliminate cause of high load, if neces-
sary increase speed or use tools with
smaller diameter.
C
• Electronics of controller faulty.
R
• Check controller or have repaired.
F
= Fault
C
= Cause
R
= Rectification
F
• Loud running noise or K-POWERgrip
handpiece EWL 4941 heats up
11
K-POWERgrip EWL 4941.
