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If the motor now operates, replacement of the brake is indicated, refer to Page
52 replacing the Lens Drive Brake. If the motor still will not operate,
replacement of the Lens Drive Assembly is indicated.
SOLENOID VALVES:
Identification:
For identification purposes, the solenoid valves are referred to as numbers 1-5 from
left to right.
#1. Controls the opening and closing of the lens and pattern clamps.
#2. Controls the forward and return movement of the Lens Drive Assembly.
#3. Controls the left and right movement of the Cutter Motor Assembly.
#4. Controls the opening and closing of the Differential.
#5. Controls the Finish Only cycle.
Description:
The solenoid valves are electro-mechanical switches designed to control the flow of
air in pneumatic systems. Keep in mind that it is possible to have either an electrical or
mechanical malfunction of the solenoid.
Electrical:
Each solenoid valve has a built-in indicator light, which can be used to
determine if electrical power is reaching the solenoid. If a malfunction is
indicated due to the failure of one of the pneumatic slides to operate locate the
appropriate solenoid and cycle the edger. If the indicator light fails to light, an
electrical problem is indicated.
1.
disconnected by squeezing the receptacle and sliding the wires straight out).
2.
3.
If the problem remains in the same location, replacement of the solenoid is
indicated, if the light of the solenoid, which is known to be good, now fails to
light, an ohm meter should be used to check the wires from the solenoid to the
NATIONAL
INCORPORATED
TROUBLESHOOTING
Unplug one of the functioning solenoid leads (the wires may be
Switch the wires with the suspected unit.
Cycle the edger.
Tel: 434-295-9126 Tech Support: 800-247-9796 Fax: 888-239-0778
100 Avon Street, P.O. Box 1547
Charlottesville, VA 22902
Revision: 11/98 Page - 44 -
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