Fault: Machine Runs But Does Not Pump; Fault: The Machine Runs, But Not At The Stated Operating Levels - Wilo EMU FA+HC20.1 Series Installation And Operating Instructions Manual

Troubleshooting
Fault: Machine runs but
does not pump
Fault: The machine runs,
but not at the stated op-
erating levels
9-2
Cause
Impeller/propeller impeded by adhesive mate-
rial, blockages and/or solid matter, increased
current consumption
The pumped fluid is too dense
Table 9-2: The motor starts, but the motor protection switch triggers shortly after start-up
Cause
No pumped fluid
Intake blocked
Impeller/propeller blocked or obstructed
Defective hose or piping
Intermittent operation
Table 9-3: Machine runs but does not pump
Cause
Intake blocked
Slide in the discharge line closed
Impeller/propeller blocked or obstructed
Incorrect direction of rotation
Air in the system
Machine pumping against excessive pressure
Signs of wear
Defective hose or piping
Inadmissible levels of gas in the pumped liquid
Two-phase operation
Table 9-4: The machine runs, but not at the stated operating levels
Remedy
Switch off the machine, secure it against
being switched on again and free the impeller/
propeller or clean the suction port
Contact the manufacturer
Remedy
Open the container intake or sliders
Clean the intake, slider, suction port or intake
strainer
Switch off the machine, secure it against
being switched on again and free the impeller/
propeller
Replace defective parts
Check the control panel
Remedy
Clean the intake, slider, suction port or intake
strainer
Fully open the slide
Switch off the machine, secure it against
being switched on again and free the impeller/
propeller
Replace 2 phases on the mains supply
Check the pipes, pressure shroud and/or pump
unit, and bleed if necessary
Check the slide in the discharge line, if neces-
sary open it completely, use a different impel-
ler or contact the factory
Replace worn parts
Replace defective parts
Contact the factory
Have a specialist inspect the connection and
correct it as necessary
WILO EMU 3.0