Grundfos Unilift KP 150 Instrucciones De Instalación Y Funcionamiento página 18

Fault
4. The pump runs
but gives no
water.
18
Cause
a) The pump is blocked by impurities.
b) The outlet pipe or check valve is
blocked by impurities.
c) The impeller is not properly fixed to
the shaft.
d) Air is trapped in the pump.
e) The liquid level is too low. The inlet
strainer is not completely
submerged in the pumped liquid.
f) Pumps with float switch: The float
switch does not move freely.
Remedy
Clean the pump. See section
7.1 Cleaning the pump.
Clean the outlet pipe or the check
valve.
Tighten the impeller.
Vent the pump and the outlet
pipe.
Submerge the pump's inlet
strainer in the liquid or adjust the
float switch.
Adjust the float switch cable. See
section 4.4 Adjustment of cable
length for a float switch.