Storch Airless ST 450 Mode D'emploi page 148

Fault
Sprayer will not shut off
after reaching or excee-
ding maximum pressure.
Other electrical problems
Original instruction
What to Check How to check
Check pressure con- Disconnect the pressure regulator. If the sprayer still runs, replace
trol. the control board. If the sprayer stops, replace pressure control.
Motor leads are Replace loose terminals; crimp to leads. Be sure terminals are
securely fastened firmly connected. Clean circuit board terminals. Securely reconnect
and properly mated. leads.
For loose motor Tighten terminal screws. Replace brushes if leads are damaged.
brush lead connec-
tions and terminals.
Brushes must be Replace brushes.
13 mm minimum.
NOTE:
Brushes do not wear
at the same rate on
both sides of motor.
Check both brushes.
Broken or misaligned Replace spring if broken. Realign spring with brush.
motor brush springs.
Rolled portion of
spring must rest
squarely on top of
brush.
Motor brushes may Clean brush holders. Remove carbon with small cleaning brush.
be binding in brush Align brush leads with slot in brush holder to assure free vertical
holders. brush movement.
Check the motor Replace the motor.
armature for signs
of fire, notching and
an unevenly worn,
rough surface.
148