Axpert 3KVA-110V Service Manual
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Axpert 3KVA-110V Service Manual

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SERVICE MANUAL
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
V201608A
All manuals and user guides at all-guides.com

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3KVA-110V/120V

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  • Page 1: Table Of Contents

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 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.

  • Page 2: General Information

    1. General information 1.1 Getting start This manual is used as a checking and repairing guide for 3KVA-110V/120V model. Before read this manual, it’s better to have some electrical or electronic background knowledge. With this guide, you can fix the inverter by yourself firstly.

  • Page 3: Inverter Family

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 1.3 Inverter family This service manual includes different models of the inverter, the table as below contains some important parameters with different models. These models names are only neutral names; please match the real model name of your inverter to the model name in the table by comparing the typical characteristics.

  • Page 4: Pcb Overview

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 1.5 PCB overview Main board (MPPT): Control board terminal Grid connection Load connection Battery connection ISO TX ISO TX Power Solar supply connection To MPPT board BUS soft start power supply...
  • Page 5 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Control board: To Comm To SCC To Parallel To LCD To LED MPPT SCC board: Battery connction Solar connection V201608A...

  • Page 6: Troubleshooting

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 2. Troubleshooting 2.1 How to do When the inverter was faulty, normally there are two main symptoms:  No display at all;  Fault code or warning code on the LCD;...

  • Page 7: Test Step

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V How to solve Replace the main board. 2.2.2. 09 fault Description Bus soft start fails. Possible reason DC-DC module was damaged. Check the main board by following “3.1~3.4”; How to check How to solve Repair the main board or replace it directly.

  • Page 8: Checking And Measuring Guide

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3. Checking and measuring guide 3.1 Check the battery side components Fuse and capacitors Parts Attribute Reference values Failure status Resistor 0 ohm Open C18/C13/C8 If the capacitors explode as below, they need to be replaced.
  • Page 9 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Power devices DC/DC MOSFET: Q11/Q17/Q20/Q24 & Q38/Q21/Q22/Q12 & Q13/Q18/Q23/Q19 & Q40/Q26/Q25/Q14 Parts Attribute Reference values Failure status All: Resistor GS: 11.7k Short or explosion GD: 250k DS: OL Diode SD: 0.43V...
  • Page 10 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3.1.1. Drivers (This part is only used for repair checking) Note: Drivers usually need to be checked when users want to repair the boards. Because when power devices were damaged, the high voltage will rush to driver circuit through the gates of power devices.
  • Page 11 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V The Q46and Q48 are 11-300012-00G (TR 2A 50V NPN TO-92) The Q47and Q49 are 11-300005-00G (TR 2A 50V PNP TO-92NL) The Q41and Q43 are 11-300012-00G (TR 2A 50V NPN TO-92)
  • Page 12 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V The Q54and Q56 are 11-400011-00G (TR 2A 50V SOT-89) The Q55and Q57 are 11-400010-00G (TR 3A 50V SOT-89) The Q51and Q52 are 11-400011-00G (TR 2A 50V NPN SOT-89) The Q50and Q53 are 11-400010-00G (TR 3A 50V PNP SOT-89)
  • Page 13 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V The Q60 and Q61 are 11-420007-00G (MOSFET 5.8A 30V SOT-23) Parts Attribute Reference values Failure status Q60/Q61 Resistor GS: 5.637k Short or explosion GD: 12k DS: 35k Diode SD: 0.184V DS: 1.2V...
  • Page 14 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Parts Attribute Reference values Failure status Resistor PIN13 TO PIN12: 22k Short or explosion PIN11 TO PIN12: 432k PIN14 TO PIN12: 432k Note: If you are not sure about these components, we recommend you replacing them all.

  • Page 15: Check The Bus Side Components

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3.2 Check the bus side components Power devices DC/DC IGBT: Q27/Q28/Q29/Q30 Parts Attribute Reference values Failure status Q27/Q28/Q29/Q30 Resistor GE: 22 ohm Short or explosion GC: 181k CE: 1 Meg Diode EC: 0.37V...
  • Page 16 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Drivers (This part is only used for repair checking) Meanwhile, we also need to check the driver tubes of these power tubes. Parts Attribute Reference values Failure status R91/R102/R96/R101 Resistor...

  • Page 17: Check The Buck Circuit

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3.3 Check the buck circuit Power devices BUCK MOSFET and Diode: Q32/D13 Parts Attribute Reference values Failure status Resistor GS or GE: 23.5k Short or explosion GD or GC: 273k...
  • Page 18 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Drivers (This part is only used for repair checking) Parts Attribute Reference values Failure status R125 Resistor 47 ohm Open or other values R124 Resistor 10 ohm Resistor + to -: 240k...

  • Page 19: Check The Inv Full Bridge

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3.4 Check the INV full bridge Power devices INV IGBT: QA1/QC1/QB2/QD2 Parts Attribute Reference values Failure status QA1/QC1/QB2/QD2 Resistor GE: 23k Short or explosion GC: 235k CE: 900k Diode EC: 0.4V CE: OL Note1: If one or more of them were damaged, please replace all of them.
  • Page 20 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Drivers Parts Attribute Reference values Failure status R48/R144/R140/R137 Resistor 47 ohm Open or other values R139/R145/R150/R152 D5/D6/D12/D16 Resistor + to -: 240k Short or explosion - to +: OL Diode + to -: 0.6V...

  • Page 21: Check The Pwm Scc Board

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Parts Attribute Reference values Failure status U1/U2/U3/U4/U12 Resistor PIN8 TO PIN5: 2k Short or explosion PIN7 TO PIN5: 2k 3.5 Check the PWM SCC board Parts Attribute Reference values Failure status Q63, Q68, Q73, Q7, Q31 Resistor GS: 433.4k...

  • Page 22: Check The Mppt Scc Board

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 3.6 Check the MPPT SCC board Power devices Parts Attribute Reference values Failure status Q2, Q3, Q4, Q10, Q11, Resistor GS: 4.964k Short or explosion GD: 37.2k DS: 260.0k Diode SD: 0.45V...

  • Page 23: Disassembling Guide

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 4. Disassembling guide 4.1 Open the case Remove screws on the top cover V201608A...

  • Page 24: Remove The Control Board

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Open the top cover carefully, for there are two cables connected with LCD display. 4.2 Remove the control board Remove the cables on the control board. Remove the fixing screws.

  • Page 25: Remove The Fans

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Take out the control board. Note: When you put the new control board on the main board, please make sure that the connection is correct and tighten. Don’t forget to put the screws and cables back.
  • Page 26 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Take the plastic screws out. And then you can take the fan paper off. Remove the screws of the fans Remove the fans cables. And then you can take the fans out of the case.

  • Page 27: Remove The Mppt Board

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 4.4 Remove the MPPT board. Note: For PWM model, this step is not available. Remove the power cables on the main board. Remove the signal cables away from the main board.

  • Page 28: Remove The Main Board

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Remove the screws on the MPPT board. 4.5 Remove the main board. Note: Before replace the main board, please follow 4.2 ~ 4.4, remove the control board, MPPT board, and fans first.
  • Page 29 All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V Remove the screws on the main board. And then you can take the main board out. Note: There are nine screws to fix the main board. V201608A...

  • Page 30: Cables Connection

    All manuals and user guides at all-guides.com SERVICE MANUAL 3KVA-110V/120V 5. Cables connection MPPT 16-500689-XXG Display Panel board CN16 16-500238-XXG Switch CN12 Main board 16-500758-XXG GRID-N GRID-L CN14 CN15 GRID-L GRID-N PAR board 16-500243-XXG COMM board 16-500522-XXG V201608A...

This manual is also suitable for:

3kva-120v

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