Sun Pumps MTR BLM-SB-073S-60 - Manual (Page 17)

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, 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 trouble shoot 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). 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.
2. 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.
3. Check the fifth LED, labeled “Low Power”; this is the low power shutdown indicator.
If it is on, the controller detected a low power or low water condition. The low power
shut down is a common occurrence on days which have clouds which block the sun
momentarily. First check the input voltage to the controller. Verify that this exceeds
the minimum voltage in Table 1. If it does not meet or exceed the minimum voltage,
you do not have enough power to start your pump. Note: To accurately trouble shoot
this feature there should be absolutely no clouds blocking the sun at any time during
the following tests. If you have enough input voltage, turn the controller off then on
again to reset this fault. If the low power or low water condition still exists then the
controller will start but shut down again. Turn the blue pot labeled “LP Adj” all the
way counter-clockwise. Cycle the pump off then on. If the pump does not shut down,
the low water cutoff was causing the error. If you want to use this feature, readjust the
low water cutoff as seen earlier in this manual. If the does not run properly, skip to
step 7. Check to verify the pump is not running out of water. If your pump is not
running out of water, call Sun Pumps for further assistance.