RECOVERY SYSTEM
57
Service Manual – Advenger, 2800ST, 3800ST, BR 755, BR 855
Troubleshooting Recovery System Issues
Problem
Possible Cause
Advenger / BR 755, 855 and ST
Poor water pickup from squeegee tool
1. Misadjusted squeegee tool - refer to “Squeegee Alignments” section
2. Worn or damaged blades - refer to Operating Manual for instructions
3. Leak in vacuum system - check for bad gasket, leaky hose, damaged tank, leaky drain
valve.
4. Restriction in vacuum system - check for debris in squeegee tool, vacuum hoses, float
cage, or wherever air is forced to make a sharp turn.
Vacuum motor keeps corroding and failing.
Liquid is being pulled into vac motor due to excessive foam in recovery tank. Recommend
defoamer and don’t fill until shuts off automatically.
Vacuum motor is normally dry, now it’s wet and
failing.
Vacuum leak below the water line creating turbulence in the recovery tank, causing water
to enter the vacuum motor.
The control board doesn’t indicate the recovery
tank is full before the ball valve shuts off the vac
motor.
1. Check the vacuum motor sense wire (BRN/RED) for break or poor connection (mV
signal).
2. Check that cage for ball float is clean.
Display shows the recovery tank is full but it’s not.
Disable Recovery Tank Full automatic shut-off via Hidden Menu.
ST
Vacuum motor doesn’t turn on
1. Go into Fault Recall mode and check for error code 3,1 for vac motor circuit problem.
2. Check limit switch S6 in steering column. Moving the handle to the down position
should move squeegee cable down and close switch S6 turning on the vac motor circuit if
operating properly.
Vacuum motor contactor doesn’t energize
Go into Fault Recall mode and check for error 3,3
