OPERATION
57
8400D MM312 (2–94)
Problem
Cause
Remedy
Trailing water – poor or no
water pickup.
Worn rear squeegee blades.
Rotate or replace squeegee
blades.
Rear squeegee out of adjustment.
Adjust rear squeegee.
Side squeegees raised.
Lower side squeegees.
Worn side squeegee blades.
Replace side squeegee blades.
Side squeegees out of
adjustment.
Adjust side squeegees.
Demister cover not seated.
Reseat demister cover.
Demister cover seals worn.
Replace seals.
Too much solution flow to floor.
Reduce solution flow to floor.
Vacuum hose clogged.
Flush vacuum hoses.
Recovery tank full.
Drain recovery tank.
Check ES
pump and filter
Float stuck shutting off vacuum.
Clean float.
Debris caught on rear squeegee.
Remove debris.
Foam filling recovery tank.
Empty recovery tank; use less or
change detergent.
Vacuum hose to rear squeegee
disconnected or damaged.
Reconnect or replace vacuum
hose.
Vacuum fan to recovery tank hose
damaged.
Replace hose.
Little or no solution flow to the
Solution tank empty.
Fill solution tank.
floor.
Solution control linkage out of
adjustment.
Replace and/or adjust cable.
Solution supply lines plugged.
Flush solution supply lines.
ES
switch off.
Turn ES
switch on.
Poor scrubbing performance.
Debris caught on scrub brushes.
Remove debris.
Improper detergent or brushes
used.
Check with TENNANT
representative for advice.
Worn scrub brushes.
Replace scrub brushes.
ES
system does not fill
Clogged solution pump or lines.
Flush ES
system.
solution tank.
ES
float stuck.
Clean floats of debris.
Clogged ES
pump filter.
Clean filter.
Water levels too low in tanks.
Add water.
