Sun Pumps SCP 48-18-48Y BC - Manual (Page 13)

Wiring Continued
1. After mounting the controller, make sure the on/off switch is in the OFF position.
2. If you are using a remote switch, like a float switch, set dip switch 1 to the correct position for the type of switch
being used. (“Normally Open” or “Normally Closed”.) If you are not using a remote switch leave switch 1 off.
3. Verify all remaining dip switches are off at this time.
4. Connect ground rod conductor to the controller chassis ground block. This pump system should be grounded to
the same ground as the AC main ground of the facility, if present.
5. Connect solar module frame ground conductor to controller chassis ground block.
6. Connect the green pump ground conductor to controller chassis ground block.
7. Connect pump motor leads to the corresponding “Pump Motor” terminals on the controller. Red to “Red”, yellow
to “Yellow” and black to “Black”. No other
8. Verify that the disconnect switch is in the off position. Connect the DC source supply negative (-), the black
conductor, to one of the controller terminals labeled “Negative” on the “Solar Array Input”. (NOTE: The power
should be connected to an electrical disconnect and it should be in the OFF position before connecting power to
the controller).
9. Connect the DC source supply positive (+), the red conductor, to the controller terminal labeled “Positive” on the
“Solar Array Input”. No other input power connections are supported. (NOTE: The power should be connected
to an electrical disconnect and it should be in the OFF position before connecting power to the controller).
10. Refer to the next section for “Remote Switch” connections and “Adjustment Procedures” for configuration, if
applicable.
11. At this point, all system components are installed and wired, double check conductor polarities, wire termination
tightness and controller configuration. With a DC volt meter check the array open circuit voltage (Voc) on the
array side of the disconnect switch and the module polarity. Record the Voc for future reference. You may do
this on the Before Calling Sun Pumps Worksheet near the end of this manual. Check this voltage reading against
the “Voc” range for your specific system in the chart below. (Figure 3)
12. After you have verified the voltage and polarity, switch the disconnect switch on - if the polarity is correct the first
LED light will be on.
13. Turn the “On/Off “switch to the ON position. The system should be operational. If the system does not start
and turns on any error lights or gives you an error message, proceed to the troubleshooting guide.