PFT G 4 X - Table of Faults

Mixing pump G 4 X smart Overview - Operation and service
Work on troubleshooting
2021-08-12 47
41.5 Table of faults
Fault Possible cause Solution Rectification by
Machine does
not start
water
Water pressure too low Check water supply, clean strainer
screen
Operator/Service
engineer
Pressure gauge shows less than
2.2 bar
Connect booster pump Service engineer
Machine does
not start
power
Power supply not in order
Repair power supply
Service engineer
Main switch not activated
Activate main switch
Operator
RCCB was triggered
Reset RCCB
Service engineer
Yellow pilot light, fault direction of
rotation lights up
Push the metal bracket at the main
switch in the opposite direction
Operator
Motor protection switch triggered Turn motor protection switch in
control cabinet to position 1
Service engineer
Operating button “ON” not pressed
Press operating button “ON”
Operator
Contactor defective
Change contactor
Service engineer
Machine does
not start air
Insufficient drop in pressure in the
remote control due to blocked air
duct or air nozzle pipe
Clean blocked air duct or air nozzle
pipe
Operator
Air safety switch set wrongly
Set air safety switch
Service engineer
Air compressor not switched on
Switch on air compressor
Operator
Machine does
not start
material
Too much thickened material in
hopper or mixing section
Empty half of the hopper and start
again
Operator
Excessively dry material in pump
part
Run the machine in backward mode,
otherwise remove pump and clean it
Operator
Water does
not run (flow
meter does
not show
anything)
Solenoid valve (hole in membrane
blocked)
Clean solenoid valve Service engineer
Solenoid coil defective
Change solenoid coil
Service engineer
Pressure reducing valve closed
Open pressure reducing valve
Operator
Water inlet at pump tube blocked Clean water inlet at pump tube Operator
Needle valve closed
Open needle valve
Operator
Cable to solenoid valve defective
Replace cable to solenoid valve
Service engineer