Page 3 of 26 Rev. A
Table of Contents
1. I ntroduction……………………………………………………. 4
2. Block Diagram ……………………………………………....... 5
3. Control Power Circuit ……………………………………….. 7
4. Battery Charger ………………………………………………. 9
5. Line and Zero-Crossing Detection ……………………….. 11
6. I nverter Operation …………………………………………… 13
7. Active Clamp …………………………………………………… 15
8. Microprocessor (CPU) Control Circuit ………………...... 16
9. Relay Circuit …………………………………………………… 18
10. Displays, Audio Alarm and Control Button …………… 20
11. Load Detection Circuit …………………………………….. 21
12. I nterface Circuit …………………………………………….. 22
13. Troubleshooting …………………………………………….. 23
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