DC-AC off-grid测试输出端电压电流为0是什么问题

Kurt,
        下面是我以前做的一些测试步骤，你可以参考一下，应该是某些开关没打开。
Test Procedure
(1) Before the test, please make sure the unit test is complete.
(2)Make sure the firmware in the control card is no voltage loop and no PLL version.
(3) Insert the +15V power adapter to the J1, then switch on the S1.
(4) Check if the LD2 of the control card is flashing per 1 second.
(5) Power up the DC source, set up the current limitation to 2A, then enable the output, then regulate the output voltage of the DC source to 400V slowly. Measure the voltage between the +BUS and –BUS, check if the voltage is equal to the DC source voltage.
(6) Press the SW1 for over 1s to turn on the board, to see if the LD2 of the control card is constantly lightened. If yes, do the following test.
 

• 1.       Grid-Off Open Loop Test Result
  

Set the INCR_BUILD=1 in the SolarHv_DCAC-Setting.h file, and then rebuild and load the project.
Do not connect any load to the output of the DC-AC board.
Connect the GUI to the board, and check the status of the DC-AC board.
Picture 1 and Picture 2 is the test result of the board when the DC voltage is set to 100V.
In the Picture 1, we can check the status of the DC-AC board form the GUI.
Picture 2 is the output AC voltage waveform from the.
  
 
                                                                         - ERIC

谢谢专家解答
不过我想请问一下为何输出端不接负载(电阻)就可以让程序运作，接了却反而不行
 

Kurt,
        应该是程序里面有对检测电流，当检测到电流时，会不让程序运行。
Eric
                                                                         - ERIC

那请问要如何操作并Connect 44ohm resistor load to the output(因为专家您说的是输出端没有接上电阻) ，然后得到如Quick Start Guide for Solar HV DC-AC Board_Rev1.3 中off-grid test的测试结果(Test the output current waveform. If it is running normally, the output voltage will be about 120VAC, and the output current will be about 2.71A RMS. The reference current waveform is below.)

Kurt,
         我当时测试的那个版本是比较1.0的版本，如果新版本需要连44欧的电阻，你就按照使用说明来测试。我记得里面要求的电阻功率200W左右。
Eric
                                                                         - ERIC

您好，我是新买的这个板子，用的硬件和软件和您一样，请问您知道这个板子的上电顺序是什么嘛？我一上直流电，还没运行程序呢，IGBT就烧了~