User Manuals: Must PH1800 PLUS 4K Hybrid Solar Inverter

User Manuals: Must PH1800 PLUS 4K Hybrid Solar Inverter

Manuals and User Guides for Must PH1800 PLUS 4K Hybrid Solar Inverter. We have 1 Must PH1800 PLUS 4K Hybrid Solar Inverter manual available for free PDF download: Service Manual

Must PH1800 PLUS 4K Service Manual

Must PH1800 PLUS 4K Service Manual (37 pages)

Charger

Brand: Must | Category: Inverter | Size: 3 MB

Table of Contents

Table of Contents
2
1 General Information

3
2 Fault and Troubleshooting

5
3 Maintenance Step

6
- Maintenance
  6
  - To Check DC FUSE and Capacitance
    6
  - DC/DC Boost Module
    7
  - Divers
    9
- To Check BUS Module
  13
  - Power Devices
    13
  - IGBT Diver Circuit
    14
- To Check BUCK Circuit
  15
  - Power Devices
    15
  - Divers
    16
- To Check Invert Full Bridge
  17
  - To Inspect Power Components as below
    17
  - To Check Drivers
    17
- To Check BUS Soft Start Circuit
  19
  - Plug-In Components
    19
- To Check the AC Switch-On Power Supply Circuit
  21
- To Check the Battery Switch-On Power Supply Circuit
  23
- To Check the MOSFETS for Reversed Protection on DC Terminal
  25
- To Check NTC Circuit
  25
- To Check Fan Driver Circuit on Main Board
  30
4 Other Common Faulty Cases

30
- MOSFET Burnt
  30
- Input Cable Disconnection
  31
- Dust-Covered Control Board
  31
5 Assembling Guidance

31
6 Test Guidance after Repairing

35

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