Troubleshooting; Pump Does Not Run; Pump Attempts A Restart Every 240 Seconds - Lorentz PSk2-7 Manuel D'installation Et De Fonctionnement

13 Troubleshooting

Please read this section carefully in case you experience any
problems with the pump system and follow the checklists.
Should technical support by LORENTZ become necessary,
please provide the model and serial numbers.

13.1 Pump does not run

Most problems are caused by either wrong cable connec-
tions (in a new installation) or failed connections, especially
insufficiently tightened cables that come loose from the
terminal. Please check the wiring. The System ON light will
indicate that the system is switched on and connected to
the controller. It indicates that voltage is present but in a
solar-direct system there may not be sufficient power to
start the pump. In this case it will attempt a restart every
240 seconds.
When the solar power on the array is too weak for
the pump to run, it will attempt to start about every 240
seconds. During each attempt, you will see the PUMP ON
light come on.
If a shadow suddenly passes over the array, e.g. if you walk
in front of it, the controller might lose track of the input
voltage. It may make rapid on/off noises and a high-pitched
noise, then stop. This does not indicate a problem. The pump
will attempt to restart after the normal delay.
Time delays
(1) After the pump stopped due to insufficient sunshine –
240 seconds
(2) After full-tank float switch resets – 2 to 3 seconds
(3) After low-water probe regains contact with water in
the source – 15 minutes, but the indicator light will
slowly flash for the rest of the solar day, or until power
is disrupted or the controller is turned off/on
Force a quick start – To test or observe the system, you
can bypass the normal time delays. Switch the POWER
switch off then on again. The pump should start immediately
if there is sufficient power.
Troubleshooting

13.2 Pump attempts a Restart every 240 Seconds

The controller will emit a low noise as it tries to start the
pump. The pump will start to turn or only vibrate a little.
(1) There may be insufficient power reaching the controller.
A solar-direct (non-PowerPack) system should start if
there is sufficient sun to cast a slight shadow.
(2) If the pump was recently connected (or reconnected)
to the controller, it may be running in reverse direction
due to a wiring error.
(3) If the motor shaft only vibrates but does not turn, it
may have power on only two of the three motor wires.
This will happen if there is a broken connection or if
you accidentally interchanged one of the power wires
with the ground wire.
(4) The pump or pipe may be blocked by mud, clay, sand
or debris.
CAUTION – If the pump is blocked, it has
to be cleaned. Repeated starting of a
blocked pump may cause damage to the
motor. This will void the warranty.
Check the PV generator
Make sure the PV generator is facing the sun and there is no
partial shading of the array. A partial shading of as little as
10% of the arrays' surface can stop the pump.
Check all wires and connections
Carefully check for improper wiring (especially in a new
installation) and wiring condition. Wires are often damaged
by animals if they are not enclosed in conduit (pipe). Pull on
wires slightly to check for failed connections.
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