final report of internship EWB Rwanda Mukindo water project by Ntambara Sylvestre Owen Berbason

(1) There may be insufficient power reaching the controller.
A solar-direct (non-PowerPack) system should start if there is enough 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 wiring error.
(3) If the motor shaft vibrates, but does not turn, it may be getting power on only two of the three
motor wires. This might happen if there is a broken connection or if you accidentally exchanged
one of the power wires with the ground wire.
(4) The pump or pipe may be packed with mud, clay, sand or debris.
Service and Maintenance of the Controller
Routine inspection and maintenance – To make the controller run stably, a periodic inspection
must be performed every year.
Requirement of inspection and maintenance:
(1) The inspection must be performed by professional technical personnel.
(2) If necessary, cut off the power supply of the controller first.
(3) Avoid leaving any metal components in the controller, or else they might cause damage to
the equipment.
(4) An electric insulation test has been made on the controller before it has left factory. A further
test is not necessary.
(5) Do not use the megohmmeter to test the control circuit.
(6) When conducting any insulation test on the motor, you must dismantle the connection
between motor and controller.
Main points for inspection and maintenance
– Please use the controller under the environmental conditions of this manual. Inspect and
maintain as per the following table.
Table 10: Inspection overview