Sun Pumps PCA-30M1D - Manual (Page 14)

4. If the fourth LED, labeled “Over Current” is on and blinking, the controller has exceeded its current
limit and shut down. Turning the controller off then on again will reset this fault. If the controller
continues to pull high current, it will turn itself off again. Check the pump for a short to ground using
an ohm meter and call Sun Pumps for further assistance.
5. Check the fifth LED, labeled “Low Water Cut-Off”, this is the low water shutdown indicator. If it is
on and blinking, the controller detected a low water condition. The low water cut-off is a common
occurrence on days which have clouds which block the sun momentarily. (See section 3.7 for an
explanation of the Low Water Cut-Off feature.)
6. Check for proper dip switch settings on your controller. For test purposes, switche 6 must be in the off
position. This will bypass the Low Water Cut-off circuit to see if the pump will run.
7. Check for proper controller input voltage. If the pump is not running the voltage should be reading the
array open circuit voltage (Voc). Verify that this voltage is below the maximum input voltage allowed
for your controller, 45 volts. If it is correct then confirm all electrical terminations are tight and secure.
Note: To accurately trouble shoot this feature there should be absolutely no clouds blocking the sun at
any time during the following tests.
8.
PUMP IS RUNNING BUT THE OUTPUT IS LOW
1. Make sure you have full sun light at midday, that there are no clouds and no shadows on any part of
the array. Then verify power coming out of the controller. With a DC volt meter, check the voltage and
current. Check this against the pump chart for your specific application.
2. If the wires are correct verify that your system does not have any leaks where water can be lost. If you
cannot determine the problem, contact Sun Pumps for further assistance.
PUMP DRAWS EXCESSIVE CURRENT
(More than the rating of the pump, but less than the
rating of the controller)
1. Check wiring diagram for proper connection.
2. Check for skinned wires or faulty underwater splice.
3. Check for locked motor armature. With the pump out of the well, allow the controller to attempt to
start the motor. If the motor still does not run and/or it goes into an over-current state, contact the Sun
Pumps for further assistance.