7-12 Publication: 0028607
TROUBLESHOOTING
7
Power take-off
(PTO)
PTO not engaged No PTO enable signal
present at solenoid
Make sure PTO CONFIRM HYD input
LED is lit on chassis module.
No signal from PTO
pressure confirm switch
Locate and repair or replace.
Display shows PTO error
on screen, and buzzer
sounds
Engine speed greater
than 900 RPM when
enabling VAC mode on
front control panel
Reduce engine speed to idle before
enabling VAC mode.
PTO pressure confirm
switch indicates PTO did
not shift
• Make sure the PTO shaft is
spinning.
• Locate and repair or replace.
PTO failure Locate and repair or replace.
Level sensor Will not sense debris
level in body
Truck in dump mode Sensor turned off in dump mode.
Sensor face and mount
clogged with material
Use pressure washer to clean off
sensor mount and face.
Sensor signal interfered
with
Stop vacuuming debris; cycle MODE
rocker switch to DUMP then back to
VAC. Wait one minute for sensor
system to reboot and take a reading.
Other electrical problem Locate and repair or replace.
Tailgate Leaking tailgate Tailgate unlatched
Latch tailgate.
Damaged gasket Replace gasket.
Dirt around gasket or
mating surface on tailgate
Clean gasket and mating surface of
tailgate.
Damaged gasket retainer
or tailgate surface
Repair or replace.
Tailgate will not close Front or curbside control
panel not in dump mode
Set MODE rocker switch on control
panel to DUMP.
Ejector plate not fully
retracted
• Retract ejector plate.
• Perform manual override to verify
electrical issue.
Wireless or wired
pendant malfunction
• Check transmitter/receiver
communication.
• Test other body functions.
Test other body functions at curbside
panel or use screen backup controls.
Velocity fuse in protection
mode
Raise then lower tailgate.
No hydraulic oil pressure See “Hydraulics” function in Table 7-1:
Mechanical Troubleshooting.
Ejector plate fully
retracted, but proximity
switch LED is not lit
Extend, then retract ejector plate to
free up ejector plate.
Table 7-2: Electrical Troubleshooting (Continued)
Function Symptom Probable Cause Solution
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