Sun Pumps SIJ 2.2-1300P-135 BL - Manual (Page 15)

Output Power Limit Circuit (Motor Speed Control)
The Output Power Limit Control circuit is used to control the speed of the pump motor and thus the flow rate of the
pump. It is primarily used for low producing wells where the pump output is matched to the production rate of the
well. However it can also be used any time specific flow rates are required.
Output Power Limit Adjustment
The purpose of this procedure is to adjust the output power of the controller and thus reduce the water flow of the
pump. If tests show the pump will out produce the well capacity, then the controller “Speed Control” feature can
be used to match the flow rate of the pump to the production of the well.
1. With the system installed and controller properly configured, allow the pump to run at full power at mid-day
until the pump starts surging.
2. Slowly turn the “Speed Control” trim pot located on the face of the controller counter clockwise until the pump
stops surging. This is the point where the pump flow rate equals the well production. This process will
probably take a few attempts to “balance” the system for optimum water production. If maximum water is not
a critical issue you may want to reduce the pumps flow rate an additional 5% to 10% to ensure the pump will
not run dry.
(NOTE: The trim pot has a15-turn range. It usually takes many complete turns in a counter-clockwise direction
before you will notice any change in water output or output power on the display).
4.0
Troubleshooting
Sun Pumps, Inc. is dedicated to its customers and will gladly help you trouble shoot any problems with your
system. However, especially during the busy summer pumping season, we may not be able to help you right away.
Using this trouble shooting guide as your first resource when your system is not working properly can save you
valuable time in getting your system fully functional. If at any time however, you are not comfortable performing
any of these tasks, or do not fully understand the system, it is better to call than to guess. Before calling please go
through the section below labeled “Before Calling Sun Pumps” and complete the steps there.
CONTROLLER DOES NOT TURN ON
1. Check the LED’s on the face of the controller. The top LED, labeled “Power In”, should be on. This indicates
power is connected to the controller and the polarity is correct. If it is not on, verify that the controller is
properly wired, including polarity, and that the input terminals have at least 30 volts. Less than 30 volts at the
input terminals and the unit may show no signs of operation. If you do have at least 30 volts in the right
polarity, contact Sun Pumps for further assistance.
2. If the expected voltage is not present, disconnect the panels from the controller using the disconnect switch,
and check any fuses and breakers in the system. Replace blown fuses and reset tripped breakers.
3. If there are no blown fuses and no tripped breakers, check the open circuit voltage of your array. If the open
circuit voltage is not correct, troubleshoot the array to find the problem. If the open circuit voltage is correct,
call Sun Pumps for further assistance.
CONTROLLER TURNS ON BUT PUMP DOES NOT RUN
1. Make sure the On/Off switch is in the up position. (On)
2. The second LED is labeled “Run”. This indicates the pump is running. If it is on, go to the bore hole and listen
for the sound of the motor. Check for breaks in the pipe. If you cannot find a problem call Sun Pumps for
further assistance.
3. Check the fourth LED, labeled “RS Stop”; this is the remote switch shutdown indicator. If it is on, the remote
circuit or low water cutoff circuit is preventing the controller from running the pump. Set the #1 and #2 dip
switches to off and disconnect the remote switch and low water cutoff. Turn the switch off then back on. If
the light goes out and the pump starts, troubleshoot the remote switch and low water cutoff individually. If the
pump does not start and the LED is still lit, call Sun Pumps for further assistance.