SERVICE MANUAL
3KVA-110V/120V
2
V201608A
Table of contents
1. General information
.............................................................................................................................................. 3
1.1 Getting start
................................................................................................................................................. 3
1.2 Basic topology introduction
....................................................................................................................... 3
1.3 Inverter family
.............................................................................................................................................. 4
1.4 Overview the inverter
................................................................................................................................. 4
1.5 PCB overview
.............................................................................................................................................. 5
2. Troubleshooting
.................................................................................................................................................... 7
2.1 How to do
..................................................................................................................................................... 7
2.2 Check the fault information
....................................................................................................................... 7
2.3 Fault condition
............................................................................................................................................. 7
2.4 Test step
....................................................................................................................................................... 8
3. Checking and measuring guide
.......................................................................................................................... 9
3.1 Check the battery side components
........................................................................................................ 9
3.2 Check the bus side components
............................................................................................................ 16
3.3 Check the buck circuit
.............................................................................................................................. 18
3.4 Check the INV full bridge
........................................................................................................................ 20
3.5 Check the PWM SCC board
................................................................................................................... 22
3.6 Check the MPPT SCC board
.................................................................................................................. 23
4. Disassembling guide
.......................................................................................................................................... 24
4.1 Open the case
........................................................................................................................................... 24
4.2 Remove the control board
....................................................................................................................... 25
4.3 Remove the fans.
..................................................................................................................................... 26
4.4 Remove the MPPT board.
....................................................................................................................... 28
4.5 Remove the main board.
......................................................................................................................... 29
5. Cables connection
.............................................................................................................................................. 31
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