Troubleshooting Reference Table
Troubleshooting Reference Table
| Problem | Cause | Remedy |
|
|
|
Inverter CPU does not | PVGFP, AC or DC breakers | Turn on breakers in the sequence described in the |
illuminate the red or | are switched off. | operation section. |
green LEDs and does | No AC grid or DC array | Check AC connections and ensure 240 VAC is |
not operate in sufficient | ||
sunlight, | voltage is present. | present at the inverter’s AC disconnect. Check |
or the display reads “AC |
| DC connections and ensure |
Mains Not Present” or |
| present on the inverter’s disconnect. |
the VDC reading is 0. | 20 amp fuses on combiner | Install combiner board fuses. Check PV array for |
| ||
| board are missing or open. | short circuits or improper sizing for the 20 amp |
|
| fuse. |
|
|
|
The inverter CPU only | The inverter does not | Ensure the inverter AC disconnect is switched |
illuminates the red LED. | recognize any AC input | on. Check the AC voltage at the inverter and |
The green LED never | signal. | ensure AC voltage is present. Check source of |
illuminates in a flashing |
| the AC voltage. |
or solid mode, |
| Check the DC voltage on the positive and |
or the display reads “AC | Inverter does not recognize | |
Mains Not Present” or | the appropriate DC signal. | negative input terminals. The DC voltage must |
the VDC reading is 0. |
| be 50 volts or greater open circuit to initiate |
|
| inverter operation. Check for incorrectly wired |
|
| PV arrays or try again on a day with brighter |
|
| sunlight intensity. |
|
|
|
The inverter illuminates | The inverter recognizes the | Check the AC voltage and frequency with a |
the red LED upon | AC grid is present, but grid | multimeter/frequency meter. Wait for grid power |
startup and goes into a | voltage or frequency are not | to return to acceptable voltage and/or frequency. |
flashing green mode. | within the appropriate | Notify the utility company that the voltage or |
The flashing green LED | tolerances. | frequency is outside of the appropriate |
continues for over 5 |
| boundaries. |
minutes and never |
|
|
illuminates solid. |
|
|
|
|
|
The inverter CPU | The inverter recognizes the | Check the DC input voltage at the inverter’s |
illuminates a solid green | AC grid and DC array | positive and negative input terminals. The PV |
LED momentarily, then | voltages and attempts to | array is not producing enough power. Wait for |
flashes a red LED. | start selling power. The PV | sunlight intensity to increase and ensure the |
| panels are not producing | panels produce sufficient voltage for inverter |
| sufficient power for the | initialization. |
| inverter to operate at a |
|
| stable DC voltage. |
|
|
|
|