Pump Overload (Pump On Led Is Red) - Lorentz PS Série Manuel D'installation Et De Fonctionnement

68 Troubleshooting

12.3 Pump Overload (Pump ON LED is red)

The system has shut down due to an overload. This can hap-
pen if the motor or pump is blocked or very hard to turn and
is drawing excessive current (Overload may not be triggered
when the irradiation is low).
This can be caused by a high concentration of solids in
the pump. The controller will make 3 start attempts before
shutting down the system. The System ON LED will be OFF
and the red OVERLOAD LED will be ON. The system will not
reset until the ON / OFF switch is manually switched OFF
and ON again.
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.
Check the controller
(1) Remove the screws from the bottom plate of the
controller and slide out the backplate to access the
terminal block where the wires connect.
(2) Check for a burnt smell. This will indicate a failure
of the electronics. Look for burnt wires, bits of black
debris, and any other signs of lightning damage.
(3) Inspect the grounding wires and connections. Most
controller failures are caused by an induced surge from
nearby lightning where the system is not effectively
grounded. Ground connections must be properly made
and free of corrosion.