Tennant M17 Series, Service Information Manual

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M17 Service Information 90 17358 ( 08 - 20 16) 4-41
TROUBLESHOOTING
Machine Failed to Propel
STEP ACTION VALUE(S) YES NO
1 • Key On
• See “Curtis 1232SE Controller Diagnostics” section
of this manual
• Does a Curtis 1232SE controller fault condition
exist?
Correct Fault
Condition
Go to Step #2
2
• Key O ff
• See “Propel Diagnostic Mode”
• Is P1:Curtis Online?
• Does P2: Throttle input voltage (0-5 vdc) change
proportionally with throttle pedal movement?
• Does P3 :Brake pedal input turn On/Off with b r ake
pedal activation?
• Does P4: Direction input correspond with Fwd/Rev
rocker switch position?
• Does P5:Speed input from drive assembly encoder
(speed, direction, position sensor) read “0000.0
Mph?”
• Does P8:Propel motor current read “0000.0 Amps?”
• Is the answer “Yes” to all of the above?
Go to Step #3 Correct Faulty
Input Condi-
tion
3
• Key O ff
• Place machine on jackstands so drive wheel is lifted
off the flo or
• Enable forward propel
• Test voltage applied to the propel 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
Terms:
VDC = Direct Current Voltage