PFT Horizontal Screw Mixer LOTUS XS Overview – Operation
Troubleshooting
2019-11-07
31
28.4 Table of malfunctions
Malfunction
Possible cause
Solution
Performed by
Machine does
not start
Water
Water pressure too low
Check the water supply, clean the
dirt trap sieves
Operator
The water pressure is too low
Install booster pump
Operator
Machine does
not start
Power
Power cable is defective
Repair the power cable
Service
technician
Pressure switch “On” not pressed
Press the pressure switch
Operator
FI circuit breaker triggered
Reset the FI circuit breaker
Service
technician
Machine does
not start
Material
Too much thickened material in
the mixing tube
Drain the mixing tube and restart
machine
Operator
Material in mixing tube too dry
Drain the mixing tube and restart
machine
Operator
Water is not
flowing
Solenoid valve (bore hole in
membrane blocked)
Clean the solenoid valve
Service
technician
Solenoid coil defective
Replace the solenoid valve
Service
technician
Water inlet on middle
body
blocked
Clean the water inlet on middle body Operator
Needle valve closed
Open the needle valve
Operator
Cable to solenoid valve defective
Replace the cable to solenoid valve
Service
technician
Mixer motor
will not start
Mixer motor defective
Replace the mixer motor
Service
technician
Defective connection cable
Replace the connection cable
Service
technician
Machine
stops after a
short period
Water inlet screen dirty
Clean or replace the screen
Operator
Hose connection or water line too
small
Enlarge the hose connection or
water line
Operator
Water intake line too long or intake
pressure too weak
Connect
an
additional
booster
pump, if necessary
Service
technician
No mortar
flow
Poor mixing in mixing tube
Add more water
Operator
Material clogs and narrows the
water inlet
Remove the material and clean the
water inlet
Operator
Material in the material hopper has
become wet
Remove the wet material and dry
the material hopper
Operator
Mixing shaft defective
Replace the mixing shaft
Operator