Quick checklist
Make sure
(1) the pump is suited for the total lift that is required.
(2) the “max. RPM” adjustment in PumpScanner is not the
reason for perceived low pump performance.
(3) the solar array is receiving sufficient sun light without
shading on the modules, the PV generator is oriented
properly and tilted at the correct angle. Inspect and test
the PV generator circuit and the controller output, as
stated. Take notes of your measurements.
(4) all wires and pipe runs are sized adequately for the
respective distance.
(5) there is no leak in the output pipe from the pump.
Could the issue not be resolved, please raise a service
case with LORENTZ including the service support forms
available on partnerNET, model and serial numbers and your
measurements.
Check the dry running protection
If the controller indicates “source low” when the pump is
submerged in water or draws from a sufficient water source,
check the dry running protection system. The probe is
mounted on, or near the pump. If inspection is not feasible,
you can measure the well probe for continuity with a
multimeter. The Well Probe should show continuity when it
is submerged in the water.
Check the float switch
If the controller indicates “remote switch” when the storage
tank is not full, inspect the float switch system. If your
system has a float switch, it will be mounted in the tank. If
inspection is not feasible, you can bypass the switch or test
it electrically.
Force a quick start
If you restore a connection or bypass the probe or float
switch, there is no need to wait for the normal time delay.
Manually switch the on/off switch (or the power source) off
and on to reset the system. The pump should start immedi-
ately if sufficient power is present.
If the pump responds to the bypass tests but not to the float
switch, the wires may be shorted (touching each other) or
open (broken) or the switch may be stuck with debris, or out
of its correct position.
74 Troubleshooting
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