16
English (US)
4. The pump runs
but gives no
water.
a) The pump is blocked by impurities. Clean the pump. See section
7.1 Cleaning the pump.
b) The outlet pipe or check valve is
blocked by impurities.
Clean the outlet pipe or the check
valve.
c) The impeller is not properly fixed to
the shaft.
Tighten the impeller.
d) Air is trapped in the pump. Vent the pump and the outlet
pipe.
e) The liquid level is too low. The inlet
strainer is not completely
submerged in the pumped liquid.
Submerge the pump’s inlet
strainer in the liquid or adjust the
float switch.
f) Pumps with float switch: The float
switch does not move freely.
Adjust the float switch cable. See
section 4.4 Adjustment of cable
length for a float switch.
Fault Cause Remedy
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