Preface
Thanks for using the MD300A series inverter presented by Inovance
Technology Co., Ltd.. Developed on the basis of extensive market research,
MD300A series inverter is a general-purpose inverter with high performance.
Embodying the features of products offered by Inovance Technology Co., Ltd., the
inverter bears two control modes, that is, V/F and open-loop vector, and ensures the
best low frequency torque and dynamic response performance.
Many new functions have been added on the basis of the market research and
analysis of the customer’s function requirements. This series of products are the
true high-performance inverters with general-purpose function.
The manual presents the precaution details related to the installation, parameter
adjustment, abnormal problems diagnosis and daily maintenance of the inverter.
Please carefully read the manual before the installation and keep it safe for future
maintenance reference.
Special precautions as follows:
a) Do remember to cut off the power supply upon wiring. After cutting off the
AC power, do not touch the internal parts and components until at least 5
minutes later, since it takes some time for the electric charge stored in the
capacitor of the inverter to discharge.
b) Do not touch the PCB or drop foreign material into the inverter, otherwise it
may cause short circuit, because many components inside the inverter are
static sensitive devices.
c) The grounding terminal of the inverter shall be reliably connected to the
earth with multicore cable.
d) Do not connect AC input power to the output terminals U, V and W of the
inverter.
e) The external braking resistor can only be connected between terminal P and
terminal PB.Contents
Chapter 1 Delivery inspection and safety cautions...............1
1.1 Unpacking inspection items............................ 1
1.2 Installation cautions................................. 1
1.3 Running and maintenance cautions...................... 2
1.4 Maintenance........................................... 3
Chapter 2 Product Information...................................5
2.1 Name designation rules................................ 5
2.2 Nameplate............................................. 5
2.3 MD300A series inverter................................ 6
2.4 Technical Specification............................... 7
2.5 Outline and installation dimension....................11
2.6 Recommended line diameter and peripheral accessories...14
Chapter 3 Mechanical and electrical Installation................15
3.1 Mechanical installation...............................15
3.2 Basic Electrical Installation.........................15
Chapter 4 Operation and Display.................................24
4.1 Operation and Display Interface.......................24
4.2 Parameter Modification, Running Status Display and Switching
..........................................................26
4.3 Auto Tuning of Motor Parameters.......................28
Chapter 5 Function Parameters...................................30
Chapter 6 Parameter Description.................................50
F0 Group: Basic function group............................50
F1 Group: Motor Parameters................................61
F2 Group: Vector control and V/F control parameters .......64
F3 Group: Terminal input and output.......................67F4 Group: Start and stop control parameters ...............72
F5 Group: Fault and Protection............................74
F6 Group: Auxiliary Function..............................78
F7 Group: Communication Parameter.........................83
FF Group: Manufacturer Parameter (reserved) ...............85
FP Group: User Password...................................85
Chapter 7 Fault Diagnosis and Countermeasures...................86
7.1 Fault Alarm and Countermeasures.......................86
7.2 Common Faults and the Fault Diagnosis ................101Chapter 1 Delivery inspection and safety cautions
Chapter 1 Delivery inspection and
safety cautions
1.1 Unpacking inspection items
The inverter has passed strict inspection before delivery, and is reliably packed.
However, it may be damaged during the transportation due to improper handling or
loading/unloading. Therefore, perform the following inspection immediately after
unpacking the inverter.
1) After opening the packing box, the inverter shall be sealed in plastic
bag. The plastic component of the inverter is intact.
2) There is one MD300A inverter in the packing box.
3) Check the nameplate on the side to see if the inverter is delivered
according to the order (refer to Chapter 2 for nameplate marks)
1.2 Installation cautions
1) As the environment has great influence on the life of the inverter, the
ambient temperature for the operation shall not exceed the allowable
range (-10°C to 50°C).
2) Do not use the inverter that is damaged or has defect. Contact the agent
or our company for repair as soon as possible, so as to prevent the
worsening of the damage or the fault.
3) Mount the inverter on incombustible surface like metal, and keep away
1Chapter 1 Delivery inspection and safety cautions
from flammable substances! Otherwise it may cause fire!
4) When more than two inverters are to be installed in one cabinet, please
pay attention to the installation locations to ensure the cooling effect.
5) The input power cables (R, S, T or L1, L2), DC bus, braking units (+,
PB, -) and motor outlet wires (U, V, W) shall be correctly connected,
otherwise the inverter will be damaged. Ensure that the wiring meets
the EMC requirements and the local safety standard. The wire size
shall be determined according to the manual, otherwise accident may
occur!
6) Do not try to change the parameter of the inverter set by the
manufacturer, or the inverter may not be able to run or may be
damaged.
7) Do not approach the equipment when the restart function is enabled,
otherwise there will be danger of injury.
1.3 Running and maintenance cautions
1) Only qualified electrical engineer is allowed to repair and maintain the
inverter. Do not repair or maintain the inverter with power on,

MD300A系列变频器用户手册 (英文版) 尊敬的用户，您正在寻找的是MD300A系列变频器的相关英文用户手册。MD300A是一款专为工业自动化和电动传动应用设计的高性能变频器，它具备先进的矢量控制技术，能够精确调节电机速度和力矩，广泛应用于风机、水泵、电梯、传送带等多个领域。 该用户手册详细包含了MD300A变频器的各项功能介绍、安装与接线图解、参数设置指南、故障诊断与维修说明以及安全操作注意事项等内容。通过阅读此手册，您将能够全面了解如何正确配置、操作及维护这款变频器，确保设备的高效稳定运行和延长使用寿命。 由于这是一份英文版本的手册，请确保在查阅时具备一定的英语阅读能力，或者提前准备好在线翻译工具以便于理解和参考。如果您在使用过程中遇到任何问题或需要进一步的技术支持，请随时联系我们的客户服务团队，我们将很乐意为您提供帮助。