R&D test: test the hardware and software performance, to make the design more optimization, makes sure the products have excellent

performance before production;

Board test: test the performance of every board in our products, to reduce product defective rate;

IQC: take strict quality inspection for every income components, to ensure every income components are qualified.

Aging test: make the solar pump VFDs at run status, put them in the aging test house at 50°C for 48 hours, to remove every unqualified products.

Load test: the last and the most important test, add different load to the solar pump VFDs, test their input and output value, to check their

working performance. unqualified products will be removed from the team.

By applying such strict testing process, VEIKONG ensures every outgoing solar pump VFD has excellent quality.

For 220V single phase motor connection

1: Single phase asynchronous motor wiring method (without starting capacitor):

Notice: U is connected to the common end of the starting winding and the working winding, V is connected to the starting winding, and W is connected to the working winding;

Single-phase asynchronous motor if the rotary steering is not correct, you can change the V and W wiring or set P22.13=1.

First solution: Set parameter P11.01=1 (Single phase motor type without capacitor) or second solution: set P00.11=31 if your motor frequency is 50 hz or set P00.11=32 if your motor frequency is 60HZ

For 220V single phase motor connection

2: Single-phase asynchronous motor wiring method (with capacitor)

Notice1: First solution: Connect motor cable to power terminal U and V and enter BSC mode to Set parameter P23.15=0(output phase loss shielding protection) or second solution: set macro P00.11=21 if your motor frequency is 50HZ or set P00.11=22 if your motor frequency is 60HZ