Tennant 7200, Service Manual

Page: 231 / 272

ELECTRICAL
4-75 7200 330045 (10--99)
When the operator releases the squeegee button,
the controller will run the squeegee and the brush
head actuators to the up positions. It will then run
the following procedure:
1. Turn on the vacuum fan and lower the
squeegee actuator.
2. Wait for the actuator to stall, flag error for
always stalled, early stall, or never stalled.
3. Raise squeegee.
4. Drop scrub head about 2 inches.
5. Run head actuator up.
6. Wait for the actuator to stall, flag error for
always stalled, early stall, or never stalled
7. Check brush motor current with brush
motors off. Flag error for current sensed.
8. Turn on the brush motors.
9. Flag error for zero current, low current, or
high current.
10. Turn off the brush motors.
11. Cycle and test the ES
t
pump output.
12. Cycle and test the ES
t
air flush output.
13. Cycle and test the Vacuum fan output.
14. Cycle and test the Scrub brush motor
output.
15. Cycle and test the Hour meter output.
16. Cycle and test the water valve output.
17. Blink the squeegee light (green) for system
passed, blink the overflow light (red) for
system failed.