ABB XSeriesG4 User Manual page 102

Determine if the Open Circuit voltage is greater than or equal to specification listed in Table 17 by clipping the positive
lead of the DMM to the positive wire and clipping the negative lead of the DMM to the negative wire. If the solar panel is
not above minimum, continue to the next step.
Using the selected resistor from Table 17 for the solar panel wattage, attach the selected resistor between the two solar
panel wires.
Clip the positive lead of the DMM to the one side of the test resistor.
Clip the negative lead of the DMM to the other side of the test resistor.
Determine if the loaded voltage is greater than or equal to the specification listed.
If the solar panel is not above minimum, replace the solar panel and retest.
If an issue still exists, return to Figure 79: Power Troubleshooting flowchart and continue testing.
AC charging system test
If the system setup includes an AC charger connected to the XRC
unit, test the AC charger. The following instructions contain the steps required to do so.
Step-by-step instructions
Check the DC wiring to the XRC
Check the input AC wiring from the source to the AC charging unit. Be certain the primary AC voltage is correct.
If the AC voltage at source is not correct, correct the source issue and retest as necessary.
If the primary AC voltage input level is correct, the wiring to the XRC
output from the charger, replace the charger fuse (Figure 82: Current measurement troubleshooting cable).
Retest the DC output voltage. If the fuse replacement does not correct the DC output voltage, replace the AC charging
unit.
Retest the DC output voltage.
If the DC output voltage is correct and a power issue still exists, return to Figure 79: Power troubleshooting flowchart and
continue testing.
Volts at Open
Panel Max
PMax Circuit
10 10 W 16.8 V 21 V
20 20 W 16.8 V 21 V
30 30 W 16.8 V 21 V
G4
termination block connector J17 (see Figure 80). Be certain wiring is correct.
Load Loaded
Resistance Voltage
30 Ω 25 W
16–18 Vdc
15 Ω 25 W
16–18 Vdc
10 Ω 40 W
16–18 Vdc
G4
board, and it is not supplying the required voltage to the
G4
board terminal is correct, and there is no DC
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