A 7 Malfunctions
Repair and maintenance work on the
electrical part of the unit may be per-
formed only by specialists or by persons
who have been trained in the factory and
have been made aware of the safety regula-
tions. Before opening the housing parts,
disconnect the mains plug or isolate the
unit completely from the power supply so
that there is no power to the unit.
C
• K-POWERgrip handpiece EWL 4941 is
blocked, possibly due to open chuck
system.
R
• Close chuck correctly with inserted tool
(see
A 5.1
).
C
• Break in connecting cable.
R
• Check connecting cable incl. plug
devices and if necessary replace
(see
A 6.3
).
C
• Fault in the electrical system of
K-POWERgrip EWL 4941controller.
R
• Check controller or have repaired.
C
• Diameter of tool shaft does not agree
with chuck.
R
• Use chuck or tool with appropriate
diameter.
C
• Chuck has become loose.
R
• Insert chuck correctly (see
A 6.1
).
C
• Chuck is worn.
R
• Replace chuck (see
A 6.1
).
F
= Fault
C
= Cause
R
= Rectification
F •
Tool is no longer adequately retained
in the chuck.
F •
K-POWERgrip handpiece no longer
rotates or stops from time to time.
10
K-POWERgrip EWL 4941.
