Mixing pump G 4 X Super / G 4 X XL / Part 2 Overview, operation and service
Operation
5.14.4
Table of faults
Fault
Possible cause
Troubleshooting
Rectification by
Water pressure too low
Check the water supply, clean
the strainer screen
Operator/
Service technician
Machine does
not start water
Pressure gauge shows less than
2.2 bar
Connect booster pump
Service technician
Power supply not in order
Repair power supply
Service technician
Main switch/main reversing
switch not switched on
Switch on main switch/main
reversing switch
Operator
RCD was triggered
Reset RCD
Service technician
Yellow control lamp, fault direc-
tion 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 box to position 1
Service technician
Pushbutton for control voltage
"ON" is not pressed
Press pushbutton for control
voltage "ON"
Operator
Contactor defective
Change contactor
Service technician
Machine does
not start current
Fuse defective
Change fuse
Service technician
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 is obstructed
Adjust the air safety switch
Service technician
Machine does
not start air
Air compressor not switched on
Switching on the air compressor Operator
Too much thickened material in
hopper or mixing section
Empty half of the hopper and
start again
Operator
Excessively dry material in pump
part
Allow the machine to run back-
wards, otherwise remove pump
and clean it
Operator
Machine does
not start mate-
rial
Level sensor triggered
Deactivate level sensor or top up
material
Operator
Solenoid valve (hole in
membrane blocked)
Clean solenoid valve
Service technician
Solenoid coil defective
Change solenoid coil
Service technician
Pressure reducing valve closed
Open pressure reducing valve
Operator
Water inlet at mixing tube
blocked
Clean water inlet at mixing tube
Operator
Needle valve closed
Open needle valve
Operator
Water not
flowing
(flowmeter
does not
display
anything)
Cable to solenoid valve defective Replace cable to solenoid valve
Service technician
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