Schmid & Wezel
Seite / Page
25 / 34
Stand / Version
07 / 2017
6 Maintenance
Malfunctions may occur during operation, but these are generally relatively simple to remedy. Table 1:
"Faults and corrective measures" describes these malfunctions together with their possible causes
and suggests corrective measures
Malfunction
Possible cause
Solution
Saw won't start when press-
ing the switches (checking
the saw)
Broken wire in connection cable
Check electric conductivity of controller's
terminal connections (no power sup-
plied!):
a) Terminals UVW or 1, 2, 3 (check mo-
tor connection)
b) Terminals No.: 3 - 4 (2. Handle)
c) Terminals No.: 5 - 6 (Motor switch and
lid guard)
Both switches not uniformly
pressed within less than 0.3 s
Press both switches again within 0.3 s
Front/rear lids not closed properly
or not firmly attached
Check and firmly close lids until contact
is made
Motor switch defective
Check electr. function, replace if neces-
sary
Connecting line not terminated
properly
Check, re-tighten/re-attach terminals
Motor winding defective
Check motor, replace if necessary
Saw won't start when press-
ing the switches (checking
the controller)
Wires not properly attached to ter-
minals
Check terminals and remove fault
Power contactor (labelled K1/K1M)
defective
Check and replace power contactor as
necessary
2-hand safety block (labelled KO)
defective
Check and replace 2-hand safety block
as necessary
Saw starts when switches
are pressed but stops under
applied load
Wire cross-section too small and/or
cable too long
Check dimensions according to the an-
nex 13.4 "Cross-sections of wires" and
change if necessary
Mains voltage drop
Check and remove voltage drop (S&W
provide the relevant test equipment)
Belt slack
Use torque wrench to tighten belt
Saw won't always start
when pressing the switches
or intermittently starts/stops
2-hand safety block (labelled KO)
defective
Check and replace 2-hand safety block
as necessary
Power contactor (labelled K1/K1M)
defective
Check and replace power contactor as
necessary
Wires not properly attached to ter-
minals
Check terminals and remove fault
Increased wear on belt
Guide plate of front guide pulley too
tight or jammed
Check for smooth operation, use torque
wrench to loosen or re-grease as neces-
sary
Wrong torque setting
Check using torque wrench (torque too
great)
Saw belt guide worn
see section 5.2 "Saw belt guide"