12/06/99
7
IF THE RED AND GREEN LIGHTS ARE ON, WITH ALL OTHER LIGHTS OFF AND THE PUMP DOES
NOT RUN: (IN GOOD SUNLIGHT)
4. Check for proper controller output voltage. Connect a DC volt meter across
terminals 2 LD- and 3 LD+ on the large terminal block. If no voltage is
indicated, check the fuse. If the fuse is good and there is no voltage on the
output, the controller has an internal problem and must be sent back to the
factory for repairs.
If the voltage on the output terminals is about the same as the open circuit
voltage then check for an open circuit between the controller and the pump
motor. Check the wiring and the wire splice. If there is open circuit voltage on
the pump side of the splice and the motor does not run then there is an open
circuit in the motor. This indicates the motor has an internal problem and must
be sent back to the factory for repairs.
If the voltage on the output terminals is very low, then disconnect the pump
wires and check again. If the voltage goes to open circuit, then a high current
load is indicated. Usually a high load will trigger the over-current circuit and
will turn the controller off and at the same time turn the orange light on. To
reset this circuit, turn the on/off switch off and back on again
5. Testing an SCS Brushless DC Motor.
To check an SCS Brushless DC motor, take an ohm meter and set to a meg-ohm
scale. Connect the negative lead on the meter to the positive lead on the motor
and the positive lead on the meter to the negative lead on the motor. The
reading should be over 10 meg- ohms if measuring through the drop wire with the
motor in the well. If measuring a dry motor only at the surface it should read
over 100 meg-ohms. This test is for the polarity protection diode.
To check the FETS connect the positive meter lead to the positive motor lead and
the negative meter lead to the negative meter lead. If the FETS are shorted to
ground the meter read around 2000 to 5000 ohms and steady. If they are not
shorted it read about 1 to 5 meg-ohms at first and as the internal capacitor
charges it will drift higher.
Summary of Contents for PCB-120
Page 1: ...PCB 120 DC SUBMERISIBLE PUMP CONTROLLER USER S MANUAL...
Page 8: ...12 06 99 8...
Page 9: ...12 06 99 9...
