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M17 Service Information 90
17358
(
08
-
20
16)
4-45
TROUBLESHOOTING
Scrub Head Failed to Raise/Lower
STEP
ACTION
VALUE(S)
YES
NO
1
•
Key On
•
Enable scrub head down
•
Is there a
pertinent
fault message
displayed?
See
“
Fault Section"
Go to Step #2
2
•
Key O
ff
•
See “Manual Mode” section of this manual
•
Activate the scrub head in manual mode
•
Does the scrub head raise/lower?
Go to Step #5
Go to Step #3
3
•
Key O
ff
•
See “Self-Test Mode”
•
Does the Self-Test display output circuits J4-9 and
J4-10 as open or shorted?
Correct Open
or Short Cir-
cuit Condition
Go to Step #4
4
•
Key O
ff
•
See TESTING MAIN BRUSH LIFT ACTUATOR in the
SERVICE section of this manual
•
Does the scrub head lift actuator pass the testing?
See TESTING
MAIN BRUSH
LIFT ACTUA-
TOR
Go to Step #5
Replace Scrub
Head Lift
Actuator
5
•
Key O
ff
•
Reconnect scrub head lift actuator to main wire har-
ness
•
Test voltage applied to scrub head lift 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:
J4-9 = Scrub Module Connector #4, Pin #9
J4-10 = Scrub Module Connector #4, Pin #10
Содержание M17 Series
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