Tennant M17 Series, Service Information Manual

Page: 175 / 236

M17 Service Information 90 17358 ( 08 - 20 16) 4- 7 9
TROUBLESHOOTING
STEP ACTION VALUE(S) YES NO
1 • Key On
• Enable main sweep brushes
• Is there a pertinent fault message displayed?
See
“ Fault Section"
Go to Step #2
2 • Key Off
• See “Manual Mode” section of this manual
• Activate the sweep brush in manual
mode
• Does the sweep actuator lower?
Go to Step # 6 Go to Step #3
3
• Key Off
• See “Self-Test Mode”
• Does the Self-Test display output circuits J4-16,17
as open or shorted?
Correct Open
or Short Cir-
cuit Condition
Go to Step #4
4
• Key O ff
• Test voltage applied to actuator as shown on the
electrical schematic
• Are the electrical circuits operating as shown on the
electrical schematic?
Terms:
J4-16,17= Main Sweep Module
Middle Sweep Up/Down, Actuator
Go to Step #5 Correct Faulty
Input Condi-
tion
5 • Key O ff
• See TESTING MAIN SWEEP ACTUATOR in the SER VICE
s ection of this manual
• Does the actuator m otor pass the testing?
See TESTING
MAIN SWEEP
ACTUATOR
Go to Step #6 Replace
Actuator
6 • Key O ff
• Reconnect sweep actuator to main wire harness
• Test voltage applied to actuator subsystem as
shown on the electrical schematic
• Are the electrical circuits operating as shown on the
electrical schematic?
Go Back to
Step #1
Identify Volt-
age Drop
Location and
Repair or Re-
place Neces-
sary Compo-
nents