Inovance MD300A-S0.2BA User manual

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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:
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.
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.
The grounding terminal of the inverter shall be reliably connected to the earth with multicore
cable.
Do not connect AC input power to the output terminals U, V and W of the inverter.
The external braking resistor can only be connected between terminal P and terminal PB.

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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 ____________________________________ 1
1.4 Maintenance ______________________________________________________ 2
Chapter 2 Product Information ___________________________________________________ 4
2.1 Naming rules of MD300A series inverter _________________________________ 4
2.2 Nameplate ________________________________________________________ 4
2.3 MD300A series inverter ______________________________________________ 5
2.4 Technical Specification_______________________________________________ 5
2.5 Outline and installation dimension ______________________________________ 7
2.6 Recommended line diameter and peripheral accessories____________________ 9
Chapter 3 Equipment Installation ________________________________________________ 10
3.1 Mechanical installation______________________________________________ 10
3.2 Basic Electrical Installation __________________________________________ 10
Chapter 4 Operation and Display ________________________________________________ 15
4.1 Operation and Display Interface ______________________________________ 15
4.2 Parameter Modification, Running Status Display and Switching ______________ 16
4.3 Auto Tuning of Motor Parameters _____________________________________ 18
Chapter 5 Function Parameters _________________________________________________ 20

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Chapter 6 Parameter Description ________________________________________________ 29
Chapter 7 Fault Diagnosis and Countermeasures __________________________________ 50
7.1 Fault Alarm and Countermeasures ______________________________________ 50
7.2 Common Faults and the Fault Diagnosis _________________________________ 61

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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 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, otherwise there will be danger of injury or damage to the
inverter!
2) When the motor is used for the first time, or reused after being stored for a long time, or in
regular checkup, the user must check the insulation status of the motor to prevent the damage

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to the inverter because of the poor insulation of the motor. It is recommended to use a 500V
Mega-Ohm-Meter for the insulation test and the insulation resistance shall not be less than 5M.
The motor connections (U, V and W) must be completely disconnected from the inverter during
the insulation test.
3) If the rated capacity of the motor selected does not match that of the inverter, especially when
the rated power of the inverter is higher than that of the motor, make sure to adjust the
parameters of the inverter for motor protection or install a forestage thermal relay for the motor.
4) The output frequency of this inverter is 0 to 3200Hz. Please consider the capability of the
mechanical devices when the inverter is to run at the frequency higher than 50Hz.
5) Because the inverter outputs PWM wave, the capacitor used for improving power factor and
varistor used for lightning protection shouldn't be installed at the output side of the inverter,
otherwise the inverter may have transient over-current and may be damaged. Since the output
voltage of the inverter has some harmonics, it is normal that the temperature may rise, and the
noise and vibration may increase compared with the inverter running at main frequency.
6) When the altitude is higher than 1000m, the cooling effect of inverter is deteriorated due to the
rarefaction of air, the deration must be adopted.
7) The electrolytic capacitors in the main circuits and on the PCB may explode when they are
burned and poisonous gas may be generated when the plastic parts are burned. Please dispose
the inverter as industrial rubbish.
1.4 Maintenance
1. Daily checking items
1) Check if there is any vibration of motor;
2) Check if the installation environment of inverter changes;
3) Check if the cooling fan of inverter works normally;
2. Periodical Checking items:
1) Check the fan and clean them periodically
2) Check if the screws are loose
3) Check if the inverter is rusted
4) Check if the connection terminals are loose
Check the insulation in main circuit

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Note: When testing the insulating resistance with Mega-Ohm-Meter (use DC 500V
Mega-Ohm-Meter), disconnect the main circuit from the inverter. Connect all the terminals of the
main circuit in short circuit, and then test the insulation between the main circuit and the
earth/control loop.
3. Storage of inverter
After buying the inverter, the user must pay attention to the following points for temporary/long-term
storage of inverter:
1) It is recommended to store the inverter in its original packing box. The storage temperature shall
be between -20ºC and +60ºC, with the humidity not more than 95%RH.
2) Long-term storage will cause deterioration of electrolytic capacitor. Therefore, inverters long time
not in service must be powered once within 2 years for 5 hours; and the input voltage must be
boosted gradually with voltage regulator to the rated value.

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Chapter 2 Product Information
2.1 Name designation rules
Inverter series
Mark Voltage level
Single - phase
220 V
Three - phase
280 V
A
daptive motor power
Mark
Motor power
Mark Description of mark
With only digital input terminal
Digital input & analog input
Digital input & communication
port
Description of mark
Mark
Without braking unit
With braking unit
Inverter series
Mark Voltage level
Single - phase
220 V
Three - phase
380 V
A
daptive motor power
Mark
Motor power
Mark Description of mark
With only digital input terminal
Digital input & analog input
Digital input & communication
port
Description of mark
Mark
Without braking unit
With braking unit
Fig. 2.1 Name designation rules
2.2 Nameplate
Fig. 2.2 Nameplate

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2.3 MD300A series inverter
Table 2-1 Model and technical data
Inverter model Input voltage
Rated
power
capacity
(kVA)
Rated
input
current
(A)
Rated
output
current
(A)
Motor
(kW)
MD300A-S0.2BA 0.6 3.2 1.2 0.2
MD300A-S0.4BA 1.0 5.4 2.3 0.4
MD300A-S0.7BA 1.5 8.2 4.0 0.75
MD300A-S1.5BA 3.0 14.2 7.0 1.5
MD300A-S2.2BA
Single- phase
220V Range:
-15% to 20%
4.0 23.0 9.6 2.2
MD300A-T0.7BA 1.5 3.4 2.1 0.75
MD300A-T1.5BA 3.0 5.0 3.8 1.5
MD300A-T2.2BA
Three-phase
380V Range:
-15% to 20% 4.0 7.0 5.1 2.2
2.4 Technical Specification
Table 2-2 Technical specification of MD300A series drive
Item Specification
Maximum frequency 3200.0Hz
Carrier frequency 0.5K to 16K (Hz); Carrier frequency can be adjusted automatically
according to the temperature rise.
Frequency resolution
Digital setting: 0.1Hz
Analog setting: Maximum frequency ×0.1%
Control mode Open loop vector control (SVC), V/F control
Start torque 0.5Hz/150%
Speed control range 1:100 (SVC)
Speed accuracy ± 0.5%(SVC)
Overload capability 150% rated current for 60s; 180% rated current for 1s
Torque boost Auto Torque boost; Manual Torque boost 0.1% to 30.0%
V/F curve 2 modes: Line, square V/F curve
Basic specification
DC brake DC braking initial frequency: 0.0Hz to 50.0Hz, braking time: 0.0 to 36.0s,
braking current: 0.0 to 200.0%,Built-in braking unit
Jog control Jog frequency range: 0.0Hz to 50.0Hz; Jog Acc/Dec time: 0.0 to 3000.0s
Shared DC bus Several motors can share one DC bus.
Personalized
function
Command channel Three channels: operation panel, terminals, communication (optional).

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Item Specification
Frequency source 6 frequency sources: panel potentiometer, digital reference, analog
voltage, analog current (optional), pulse, communication (optional).
Auxiliary frequency
sources
Fine tuning and frequency integration can be achieved flexibly with
auxiliary frequency.
Input terminals
Four digital input terminals, one of them can input high speed pulse
(Maximum input frequency 50kHz).
Additional function port can be selected by ordering:
A: An analog input terminal, voltage (DC 0V to 24V or 0V to 10V )
or current (0V to 20mA) input
(Finally, the analog signal is sent to the equipment with the voltage of
0-10V after the regulation of the internal circuit.)
B: 485 communication terminal
Input/output
characteristic
Output terminals
A digital(open collector) output terminal
A fault relay output terminal
An analog output terminal AO. Output voltage range: 0-10VDC.
Display and keypad
operation LED display Be able to display 7 parameters :setting frequency, output frequency,
output voltage and current, etc.
Protection function
Overcurrent protection; Overvoltage protection; Undervoltage
protection; Overheat protection; overload protection and output phase
failure
p
rotection
,
etc.
Applicable Situation Indoor, away from direct sunlight, free of dust, erosive gas.
Altitude Lower than 1,000 meters, otherwise deration is required
Ambient temperature -10ºC to +40ºC (If the ambient temperature is within 40ºC to 50ºC,
deration is required)
Humidity Less than 95%RH, without condensation
Vibration Less than 5.9m/s2(0.6g)
Environment
Storage temperature -20ºC to +60ºC

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2.5 Outline and installation dimension
1) Outline
Control terminal
barcode
Main circuit terminal
Keypad
knob
Upper cover
Lower cover
Nameplate
Control terminal
Barcode
Main circuit terminal
Keypad
Knob
Upper cover
Lower cover
Name plate
Fig. 2-3 Outline of inverter
2) Dimension of Installation Holes

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Fig 2-4 Outline and installation dimension of the inverter

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Fig 2-3 Installation Dimension of MD300A inverter (mm)
Inverter Model
Motor
(kW)
AB H WD Hole
diameter
Gross weight
(kg)
MD300A S0.2BA 0.2
MD300A S0.4BA 0.4
MD300A S0.7BA 0.75
78 126 139.5 86 134 4.2 0.9
MD300A S1.5BA 1.5
MD300A S2.2BA
Single-phase
220V
2.2
MD300A T0.7BA 0.75
MD300A T1.5BA 1.5
MD300A T2.2BA
Three-phase
380V 2.2
2.6 Recommended line diameter and peripheral accessories
Recommended circuit breaker, contactor and line diameter of leading wire:
Table 2-4 Instruction for peripheral electric component selection
Inverter model
Circuit
breaker
(MCCB)
(A)
Contactor
(A)
Main circuit
leading
wire at
input side
(mm2)
Main circuit
leading wire
at output
side (mm2)
Control loop
leading wire
(mm2)
Grounding
wire
(mm2)
MD300A S0.2BA 10 10 2.5 2.5 0.75 2.5
MD300A S0.4BA 16 10 2.5 2.5 0.75 2.5
MD300A S0.7BA 16 10 2.5 2.5 0.75 2.5
MD300A S1.5BA 20 16 4.0 2.5 0.75 2.5
MD300A S2.2BA 32 20 6.0 4.0 0.75 2.5
MD300A T0.7BA 10 10 2.5 2.5 0.75 2.5
MD300A T1.5BA 16 10 2.5 2.5 0.75 2.5
MD300A T2.2BA 16 10 2.5 2.5 0.75 2.5

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Chapter 3 Mechanical and electrical Installation
3.1 Mechanical installation
Installation environment:
1) Mount in the location where vibration is less than 0.6g.The inverter shall be far away from
impacting lathe.
2) Do not install the inverter in the place with direct sunlight, high humidity and water.
3) Mount the inverter in the location free of corrosive gas, explosive gas or combustible gas.
4) Mount the inverter in the location free of oil dirt, dust, and metal powder.
5) Install the inverter vertically so that the heat may be expelled from the top. When two inverters
are mounted up and down, an airflow diverting plate should be fixed in between, so as to avoid
the upper inverter being baked by the lower inverter. The installation bracket must be flame
retardant. If the inverter is installed in the area with metal powder, the space inside the sealing
cabinet shall be big enough.
3.2 Basic Electrical Installation
1) There are two types of main circuit terminals for the MD300A inverter based on the voltage class,
as shown in the following table:
Terminals Name Description
L1, L2 Power input terminals for
single-phase 220V inverter To connect to the AC 220V power supply
R, S, T Power input terminals for
three-phase 380V inverter
To connect to the AC 380V three-phase
power supply
(+), (-) Negative and positive
terminals of DC bus
The output point of the DC voltage, which
can connect to the braking unit, or be
used for sharing DC bus
(+), PB Connecting terminals of
braking resistor To connect to the braking resistor
U, V, W Output terminals of inverter To connect to the motor
PE Grounding terminal The grounding terminal of the inverter
cabinet
2) Notes on Wiring:
Input power supply terminals L1, L2 or R, S ,T: It is unnecessary to consider the phase
sequence.
DC bus (+) and (-) terminals: They are the output points of the inverter after rectification. There
may exist dangerous voltages on the terminals after power-down because of the power storage
of the internal capacitors. Do not operate the terminals and internal components of the inverter
unless 5 minutes has passed after power-down.
For the sake of safety and interference immunity, the grounding terminals of the inverter must

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be reliably grounded. It is prohibited to use the single-core cable as the grounding cable. The
grounding resistance must be less than 5. The grounding terminal must be exclusively used
for grounding. Do not share the grounding terminal and neutral line of the mains supply.
The configuration of the braking resistor shall be conducted according to the parameters
provided in the documents of our company. The wiring distance shall be less than 5m. The
MD300A inverter has built-in braking unit, and the external braking resistor shall be connected
to the (+) terminal or PB terminal.
3) The following figures are commonly used wiring schemes:
Braking resistor
Single - phase input
power supply
Braking resistor
Single - phase input
power supply
Fig.3-1 Wiring mode with analog input port

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Braking resistor
Single-phase input
power supply
Connect to upstream device
Braking resistor
Single-phase input
power supply
Connect to upstream device
Fig.3-2 Wiring mode with communication input port
Control terminals
Note: The common reference for the analog and digital terminals is COM, and there is’t GND
terminal.
1) The MD300A has two kind of user interface boards, and the customers must select which they
want in the order: One is with communication function, and the other with analoge input function.
The control terminals on the boards are arranged as following separately:

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Terminals with analog input:
Terminals with communication port:
2) Function description of control terminal:
Type Terminal Terminal name Function description
Analog input AI Analog input terminal
1. To receive DC 0V ~ 10V or 0V ~ 24V signals or 0mA
~20mA current signal (selected by jumper)
The three types of signals will be regulated through the
hardware circuit, and they all respond to 0V ~10V
voltage.
2. Input resistance of voltage signal: 100k
Input resistance of current signal: 200
DI1 Digital input 1
DI2 Digital input 2
DI3 Digital input 3
DI4 Digital input 4
1. Input resistance: 3.3k
2. Input voltage range: 0~ 24V
3: 21 functions available
4: DI4 can be used as high-speed pulse input or
common DI.
Digital input
and power
supply
COM,
+24V
Analog/digital input
signal common terminal
24V power supply
COM: The common terminal for all the digital and analog
input signals
+24V: The power supply for external control system
Analog output AO Analog output
The analog output will output 0V ~ 10V. For details,
please refer to the function description in F0-14, F3-12
and F3-13.
Digital output DO Digital output
Open circuit collector output.
4 digital output modes can be selected. For details,
please refer to F0-13.
Communication
A+
A-
Communication
terminals
Signal terminals for RS485 communication
Fault relay
TA-TB
TA-TC
Fault relay contact TA-TB is the normally closed contact, while TA-TC is the
normally open contact of the fault relay.
3) Wiring of control terminal:
In the case of inputting 0V to 24V, 0V to 10V and 0mA to 20mA signals, the analog input terminal
can work normally only when the jumper J1 is selected correctly. The wiring modes are as follows:

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Jumper J1 is disabled when inputting 0V ~ 10V analog voltages
the two lower pins of J1 are short circuited when inputting 0mA ~ 10mA signals,
and the two upper pins of J1 are short circuited when 0 ~ 24V signals are inputed.
(The resistance of the potentiometer shall be higher than 3K, and its power rate shall be more than
1/4W. It is recommended to adopt the potentiometer with resistance ranging from 5K to 10K).
Note: In the above three schemes of analog signal input, all the signals will be regulated through the
internal circuit. Therefore, all the input signals are converted into voltage signals of 0V ~ 10V.

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Chapter 4 Operation and Display
4.1 Operation and Display Interface
The operation panel can be used to change the function parameters, monitor the working status and
control the running (start and stop) of the inverter. The panel and its functional area are shown in Fig.
4-1:
Digital display
Program key
Quick key
Run key
Digital modification key
Function indicator
Unit indicator
Enter/data confirm key
Shift key
Potentiometer
Stop key
Reset key
Digital display
Program key
Quick key
Run key
Digital modification key
Function indicator
Unit indicator
Enter/data confirm key
Shift key
Potentiometer
Stop key
Reset key
Fig. 4-1 Operation Panel Schematic Diagram
1) Function indicators description:
RUN: If it is ON, it indicates that the inverter is in running status.
LOCAL/REMOT: Keypad and remote operation (terminal and communication control) indicator. If it
is ON, it indicates that the inverter is in remote operation and control status.
FWD/REV: It is the forward/reverse running indicator. If it is ON, it indicates that the inverter is in
forward running status.
TUNE: It is the tuning indicator. If it is ON, it indicates that the inverter is in tuning status.
2) Unit Indicators Description

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Hz: Frequency unit Hz+A(rpm): Rotation speed unit
A: Current unit A+V(%): Percentage
V: Voltage unit
3) Digital display area
With 5-bit LED display, it can display frequency setting, output frequency, various monitor data and
alarm code, etc.
4) Function Description of Keys
Table 4-1 Key Functions
Keys Name Function
PRG Program key Enter or exit the parameter menu.
ENTER Confirm Enter the menu screen level by level and confirm the parameter
settings.
∧Up Increase of data or function code
∨Down Decrease of data or function code
>> Shift
It can be used to select the display parameters circularly on the
running display interface and the stop display interface. It can
also be used to select the modification bit of the parameters
when setting the parameters.
QUICK The key is reserved for function expansion in the future, but now its function is the
same as that of the shift key
RUN RUN In the keypad operation mode, it is for running and operating the
inverter
STOP/RE
SET STOP/RESET The key is for stopping the running when the inverter is in
running state, and for resetting in the faulty status.
4.2 Parameter Modification, Running Status Display and
Switching
1: MD300A inverter’s operation panel adopts 3-level menu for parameter settings. It is easy to check
and modify the parameters.
3-level menu: function parameter group (first level) function code (second level) setting of
function code (third level). Operation procedure is shown in Fig. 4-2.

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Modify parameter group
Digital display 1 st
level menu 2
nd
level menu 3
rd
level menu
Modify function code Modify value of function code
Modify parameter group
Digital display 1 st
level menu 2
nd
level menu 3
rd
level menu
Modify function code Modify value of function code
Fig. 4-2 Operation Procedures for 3-level Menu
Note: When operating on the third level menu, press the PRG or ENTER, it can return to the second
level menu. The difference is: When pressing ENTER, the parameters will be saved and the screen
will return to second level menu and then shift to the next function code. When pressing PRG, it will
return to second level menu without saving the parameters, and remain in the position of the current
function code.
In third level menu, if the parameter has no flash bit, it means the function code cannot be changed
and the possible reasons are:
1) This parameter of the function code cannot be changed, such as the actually detected
parameter and running record parameter.
2) This function code cannot be changed in running status and can only be changed when the
inverter is stopped;
3) This parameter value is the actually measured value and cannot be modified.
2: Operating method for displaying Status Parameters:
When MD300A inverter is in the stop or running status, several status parameters of the inverter can
be displayed on the LED. Press the shift key 》the stop or running status parameters can be
displayed in sequence.MD300A inverter has seven running status parameters to be displayed in
sequence by pressing the key 》, namely, running frequency 》setting frequency 》bus voltage 》
output voltage 》output current 》terminal status 》panel potentiometer voltage 》analog input AI.