Specialty Concepts PPC - Manual (Page 20)

B E N C H T E S T P R O C E D U R E : P P C
Test equipment required: Digital Multimeter, Adjustable Power supply
Nominal Voltage Power Supply Range
12 10-18 Vdc
24 20-36 Vdc
36 30-48 Vdc
48 40-64 Vdc
All measurements described in this procedure should be made at the controller terminals.
1) Make sure that there is a jumper between Battery(+) and Battery Voltage Sense(+) and one
between Battery(-) and Battery Voltage Sense(-).
2) Check continuity between Battery(-),Solar Panel(-) and Load(-).
3) Turn off the load circuit breaker and measure the resistance between Load(+) and Battery(+).
It should be open (more than 10M ohm). Turn on the load circuit breaker and re-measure. It
should be less than 0.2 ohm.
4) Measure the resistance between Solar Panel(+) and Battery(+). It should be open.
5) Set the power supply to the nominal system voltage. Connect the power supply negative to the
controller Battery(-) terminal. Connect the power supply positive to the controller Solar
Panel(+) terminal. For 36 volt and 48 volt chargers, briefly connect a jumper between Solar
Panel(+) and Battery(+). When the charge mode light turns on, remove the jumper.
6) Verify that the charge mode light is on. Measure and note the voltage between Solar Panel(+)
and Solar Panel(-).
7) Measure the voltage between Battery(+) and Battery(-). It should be the same as the voltage
measured in step 6 to within +/- 0.1 Volt. Measure the voltage between Load(+) and Load(-). It
should be the same as the voltage measured in step 6 to within +/- 0.1 Volt.
8) Install a jumper between Battery(+) and Solar Panel(+).
9) Verify the charge termination and charge resumption set-points by changing the power supply
voltage up and down and observing the activation of the charge mode light.
10) Set the LVD switch to AUTO LVD. Verify the load disconnect and load reconnect set-points
by changing the power supply voltage up and down and observing the activation of the load
disconnected light. There is a time delay on the load disconnect circuit. The set-points must
be approached slowly to avoid overshooting. With the controller in the load disconnected
mode, press the MANUAL RESET and verify that the light goes off momentarily. Set the LVD
switch to NO LVD and verify that the load disconnect does not activate.
11) For 12 and 24 Volt chargers only; remove the jumper between Battery(+) and Solar Panel(+).
Increase the power supply voltage to 18 volts for a 12 volt system or 36 volts for a 24 volt
system. Measure the voltage between Battery(+) and Battery(-). It should be about the float
voltage.