On a three-phase inverter you have the ability to change the phase rotation of the system natively in the inverter settings between 0/120/240 and 0/240/120.
On the single-phase inverter this is not a built in setting. So when installing 3 single-phase inverters across three-phases you have to perform a workaround to clear the W03 alarm.
For a usual setup on a system with 3 singe-phase units on a three-phase system the parallel settings should be as below:
| A | B | C |
Parallel | Yes | Yes | Yes |
Master or Slave | Master | Master | Master |
Phase | A | B | C |
Modbus ID | 1 | 2 | 3 |
If the settings are set as above and Grid Phase wrong occurs, LEAVE ALL CONNECTIONS THE SAME, but change the settings to the below:
| A | B | C |
Parallel | Yes | Yes | Yes |
Master or Slave | Master | Master | Master |
Phase | A | C | B |
Modbus ID | 1 | 3 | 2 |
This settings change allows the system to detect a change in phase rotation and clears the fault.
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