Scrub System, Cylindrical 144
Service Manual – SC8000
Troubleshooting
General Troubleshooting
Problem
Cause
Correction
The scrub deck
will not extend
downward, the
scrub brush motors
will not operate and
there is no solution
flow.
Note that a fault
code 01, 13 or 15
will disable the
scrub system.
Scrub brush pressure valve
solenoids over current (fault
code 01 displayed)
• Check L5 down and L7 up pressure valve solenoid
coils (on same fault line) for wiring problems, L5
wire colors (+ ORN and - WHT/VIO) and L7 ( +
ORN and ORN/RED).
•
Check coil resistance. If less than 1.8 ohms,
replace. Also see main scrub on and right scrub
brushes deck pressure electrical ladder detail and
further specs.
Scrub brush motor solenoid
over current (fault code 13
displayed)
• Check L4 solenoid coil wiring for problems (+ ORN
and - ORN/BLU).
•
Check coil resistance. If less than 6 ohms, replace.
Also see main scrub on and side sweep/right
scrub electrical ladder detail.
Scrub cylinder lock solenoid
over current (fault code 15
displayed)
•
Check L6 solenoid coil wiring for problems (+ ORN
and - YEL/BLU).
•
Check coil resistance. If less than 6 ohms, replace.
Also see main scrub on and right scrub brushes
deck pressure electrical ladder detail.
