乍得采购需求：太阳能电池板，太阳能逆变器，太阳能充电控制器，锂电池，便携式太阳能系统，太阳能路灯

I have been using a solar inverter for over two years without any issues, but recently I encountered some problems. Specifically, the device started displaying error codes 15, 9, and 52 and subsequently stopped working altogether. I'm looking for assistance in diagnosing and resolving the issue. Could you please provide the user manual for the inverter? It would be extremely helpful for troubleshooting the error codes. Any additional guidance or support you could offer to help me address this situation would be greatly appreciated. Thank you!