Sun Pumps MTR BLM-SB-073S-60 - Manual (Page 14)

3.6 Controller Settings
The PCA series controllers have several settings (see figure 3). Most features include
system configuration adjustments, some of which are user selectable by an eight position
DIP-switch located on the face of the controller.
Switch 1 is the Remote Switch Logic. With this switch off (down), terminals “RS+” and
“GND” must be connected to turn the controller off. With this switch on (up), terminals
“RS+” and “GND” must be connected to turn the controller on.
Switch 2 is the Low Water Cutoff Logic. With this switch off (down), terminals “LW”
and “GND” must be connected to turn the controller off. With this switch on (up),
terminals “LW” and “GND” must be connected to turn the controller on.
Switches 3 and 4 are delay timer adjustments. The delay timer is used for the remote
switch and the low water cutoff. This timer by default is set for one minute. Switch 3
will increase the timer to 10 minutes; Switch 4 will increase it to 30 minutes.
See
Remote Switch and Low Water Cutoff for more information.
Switches 5, 6, 7 and 8 are not used at this time and should remain down.
3.7 Auxiliary Control Circuits
The auxiliary control circuits are configured and controlled with the “Dip Switches”, “LP
Adj.”, “Speed Control” and the “RS”, “LW” and “GND” terminals. (See Figure 3)
These circuits offer expanded capability and are described here. The remote switch
control is for float switches (storage tank level), pressure switches or a remote system
“ON/OFF” toggle switch. The motor speed control is for adjusting the flow rate of the
pump.
There is also the low water cutoff, low power shut down and over current
protection circuits. See each corresponding detailed description below.
NOTE: Use only “Shielded Wire” to run from the remote switch to the controller
and the ground wire must be grounded to the controller side only. Induced voltages
from lightning storms or two-way radio transmissions could damage the controller.
Over-Current Shut Down Circuit
The over-current shut down circuit will turn the controller off any time the current
exceeds the current limit of the controller. When it turns the controller off it will remain
off for 3 minutes and then turn on again. When it turns off an error light will light and the
display will say Over-Current. When it turns on again, if it is still pulling excessive
current it will continue to shut down for 3 minutes and try to restart.
Sensor Low Water Cutoff Circuit
The sensor type low water cutoff circuit is designed as a safety feature to protect your
pump from running dry or your tank from over flowing. The “LW” terminal of the
controller should be attached to a low water sensor electrode which is mounted in your
tank or well. The system can be used to detect low water or to detect high water
depending on the position of switch 2 on the dip switch. When dip switch 2 is in the off