Container Mixing
Pump CMP 30 4.0
Part 2: Overview –
Operation – Spare Part Lists
Troubleshooting
2021-02-10
53
Malfunction Possible cause
Solution
Performed by
“Thick-thin”
mortar flow
Not enough water
Increase water supply by 10% for
approx. ½ minute and then reduce
it slowly
Operator
Water safety switch misadjusted
or defective
Set or replace water pressure
safety switch
Service technician
Mixing shaft defective;
not an original PFT mixing shaft
Replace mixing shaft with an
original PFT mixing shaft
Operator
Pressure reducer incorrectly
set or defective
Set the pressure reducer correctly,
or replace it
Service technician
No mortar
flow (air
bubbles)
Poor mixing in mixing tube
Add more water
Operator
Mortar clogs and narrows mixing
tube inlet
Add more water or clean/replace
mixing shaft
Operator
Material in the mixing shaft has
become wet
Empty mixing shaft, dry and
begin again
Operator
Mixing shaft defective
Replace mixing shaft
Operator
Driving claw defective
Replacing the towing arm claw
Service technician
Control lamp
red, fault
lights up
Overload from the pump seizing
up with dry material
Allow the machine to run
backwards, otherwise remove
pump and clean it
Service technician
Overload due to insufficient
water quantity
Increase water supply
during start-up
Operator
Motor protection switch of pump
motor triggered
Switch on the circuit breaker again Service technician
Overload due to compacted
material
Clean the material container
Switch on the circuit breaker again
Service technician
41.6 Pumping stopped / blockage
When the conveyed material remains stuck in the conveying hoses and cannot be pumped out through
the hose ends, this is a blockage, which can occur in conveying hoses for a number of reasons.
41.7 Indications of clogged hoses:
Performed by operator:
Blockages can occur in the pressure flange or in
the material hoses.
Indications of this are:
Steep rise in feed pressure,
Seizing of pump
Sluggishness or seizing of pump motor
Widening and twisting of mortar hose
No material emerges from hose end