132Service Manual – SC401, SCRUBTEC 344 30 - Solution System
Troubleshooting
Trouble Possible Causes Remedy
Small amount of solution or no
solution reaches the brush
The solution lter is clogged/dirty Clean the lter
Solution supply valve locked in (semi) closed
position
Replace the valve
Solenoid valve (EV1) broken or electrical
connection interrupted
Replace the solenoid
valve/repair the electrical
connection
Presence of debris in water tank blocking the
outlet hole
Clean the tank
Presence of debris in the detergent solution
hose, blocking the passage of the liquid
Clean the hoses
The solution reaches the brush
also when the machine is o
Presence of dirt or scale in solenoid valve
(EV1)
Clean the solenoid valve
Solenoid valve (EV1) broken Replace the solenoid valve
The Detergent system is not
reaching the brush, or is not
arriving in sucient quantity
The hydraulic circuit upstream of the
detergent pump is not triggered
Check if the hose is lled
and, if necessary, perform
one or more draining cycles
The pump (M4) is broken or there is an open
in the electrical connection
Replace the pump/repair the
electrical connection
There is foreign material/debris in the
detergent bottle clogging the output hole
Clean the bottle
There is debris in the detergent hoses
clogging the detergent ow
Clean the hoses
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