Signs For Hose Blockages - PFT G 4 X FU Series Operating Manual

Fault Possible cause
Bad mixture in mixing tube
Mortar flow
ceases (air
Material is clumped and narrows
bubbles)
the mixing tube inlet
Material in mixing tube has
become wet
Agitator defective
Driving dog defective
Backpressure in mortar hose
During
higher than pump pressure
operation
water rises in
Rotor or stator worn
the mixing
Hose is blocked by mortar that is
tube
too thick (high pressure by low
water factor)
Overload due to the pump getting
Red pilot
blocked with dry material
lamp, fault
lights up
Overload due to low water volume
Motor protection switch pump
motor (16 A) triggered
Overload due to compacted
material in hopper

41.6 Signs for hose blockages:

2020-01-07
Mixing pump G 4 X FU 230/400V Overview - Operation
Work on troubleshooting
Solution
Add more water
Add more water or clean agitator or
replace
Empty mixing tube, dry it and start
again
Replace agitator
Replace driving dog
Retighten or replace stator
Replace rotor or stator
Remove blockage, increase water
factor
Run the machine in backward mode,
otherwise remove pump and clean it
Increase water feed on startup
Reactivate protection switch
Clean hopper
Reactivate protection switch
Implementation by operator:
Blockages can occur in the pressure flange or in the mortar
hoses.
Indications are:
rapidly increasing pressure head,
blocking of pump,
running difficulties or blockage of the pump motor,
expansion and turning of the mortar hose,
no material discharge at the hose end.
Rectification by
Operator
Operator
Operator
Operator
Service engineer
Service engineer
Service engineer
Service engineer
Service engineer
Operator
Service engineer
Service engineer
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