HKS VFD Drive A2 Series User manual

A2 VFD (0.75-30kW)
HKS VFD Drive A2 Series
User Manual

A2 VFD (0.75-30kW)
Preface
Version：1.80
Thank you very much for choosing high-quality,
multifunctional, low noise, and Eco-power products, A2
series VFDs.
This manual contains the user setup, parameter setting,
fault diagnosis, daily maintenance, and safety precautions.
Please read this manual carefully and follow all safety
precaution before moving,installation,operation and servicing
the VFD.It may cause physical injury or death,or damage the
device if you ignored.Therefore,Our company will not be
responsible for any damage and we are not legally bound in
any manner
This manual is contained in the accessories of the
productions. Please keep it safe for further referencing.
If there is any problem that isn’t listed in this manual,
please contact customer service.

A2 VFD (0.75-30kW)
1
Contents
Chapter 1. Safety Precautions 2
Chapter 2. User Setup 4
Chapter 3. Control Panel 7
Chapter 4. ParameterSet Method 8
Chapter 5. Table of Configure Parameters 9
Chapter 6. Description of Control Ports 11
Chapter 7. Description of Configure Parameters 12
Chapter 8. Operation Examples 17
Chapter 9. Error Message andFault Diagnosis 18
Chapter 10. Maintenance and Repair 20
Chapter 11. Type Description 23
Chapter 12. Disassembly method of keyboard 24
Chapter 13. Examples of parameter setting
and simple troubleshooting 36

A2 VFD (0.75-30kW)
2
Chapter 1 Safety Precautions
1.1 Safety precautions
The environment can not contain any explosive gas.
It must be wired and operated only by personnel qualified for the
specific task accordance with relevant documentation,in
particular its warning notices and safety instructions.Qualified
personnel are those who,base do n their training and
experience,are capable of identifying risks and avoiding potential
hazards when working with these products/system.
Otherwise, it may cause electronic shock.
Cut off the power supply before wiring. Otherwise, it may cause
electronic shock.
Do not touch any control port, internal boards, and their
electronic components while the electricity is turned on.
Otherwise, it may cause electronic shock.
Please make sure that the product ’ s ground wiring port is
correctly connected according to national electrical safety
standards or other related standards.
Do not touch any internal board or component until 10 minutes
after power shutdown. Please do an electricity check before
internal board maintenance. Otherwise, it may cause electronic
shock.

A2 VFD (0.75-30kW)
3
It is forbidden to connect AC power to the product’s output port
(U, V, W) or other control ports except for Lk, Lb, Lz. Otherwise,
it may cause damage to the VFD.
Since internal IC can be destroyed by electrostatic, please do not
touch any PCB, IC, or IGBT components without any protection.
Otherwise, it will cause an unknown fault.
Make sure that any unexpected conductor such as screws, gasket,
etc., is not left inside the VFD during maintenance. Otherwise, it
may cause damage to the VFD or even fire.
If over current happens during starting up, please check the
wiring and start up again.
Do not stop the VFD by cutting off power. Power can be cut off
after the motor stops.
Do not leave the VFD in the sunshine. Otherwise, it may cause
damage to the VFD

A2 VFD (0.75-30kW)
4
1.2 Package inspection
A2 series VFD undergoes a strict quality test. Please check the
damage caused by the delivery and the type specification during
package inspection.

A2 VFD (0.75-30kW)
5
Chapter 2 User Setup
2.1 Environment requirement
No corrosive gas, vapor, and oily dust. Without direct
sunshine.
No floating dust or mental particle.
Air moisture 20%~90%.
Vibration < 5.8m/s2(0.6g).
No electromagnetic interference.
Temperature:-10℃~50℃, make sure proper ventilation if the
temperature is greater than 40℃.
Without any inflammable or explosive gas, liquid and solid.
Please use an electric cabinet or remote operation in a non-
standard environment. Make sure proper ventilation.
2.2 Install space
2.3 Basic wiring
There is two wiring parts: main-loop and control-loop.
Please do wiring correctly according to the following two
figures.

A2 VFD (0.75-30kW)
6
Basic Wiring (single phase)
Single phase input
FW D/STOP
REV/STOP
L
N
FWD
REV
U
V IM
0.1u F 12 V W
41 48 5k 1
DG
D
RESET
Multi speed D0 /
Digital frequency up
Multi speed D1 /
Digital frequency down
Multi speed D2 /
External point moving enable
RST
D0/+
D1/-
D2/JOG
5k 1
Normally clo sed Lb
Normally
closed output
Normally open Lk
Normally
open output
Common control signal
The external analog signal given
0-5V,0-10V,0-20mA
GND
5V_IN
10 V_ IN
0-20 mA_IN
GND
5V_OUT
Middle Lz
5V Fout
GND
12V
OUT
Common port
5V Frequency
signal output
200mA
Power output
external
Potentio meter
2
1-5K
5V_IN
GND
5V
OUT
For external potentio
meter power
main-loop port
control-loop port
Port name
Description
L N
Single phase power input。
U V W
Three phase AC output ports can only connect to pure
resistance or inductance load such as motors or electric
heater.
Relay output
3
1

A2 VFD (0.75-30kW)
7
R
Basic Wiring (three phase)
three-phaseinput
FWD/STOP
REV/STOP
R
S
T
RUN
REV
P B
U
V IM
0.1u F 12 V
W
41 48 5k 1
DDG
RESET
Multi speed D0 /
Digital freq uency up
Multi speed D1 /
Digital freq uency do wn
Multi speed D2 /
External point moving enable
RST
D0/+
D1/-
D2/JOG
5k 1
Normally closed Lb
Normally
closed output
Normally open Lk
Normally
open output
Common control signal
The external analog signal given
0-5V,0-10V,0-20mA
GND
5V_IN
10 V_ IN
0-20 mA_IN
GND
5V_OUT
Middle Lz
5V Fout
GND
12V
OUT
Common port
5V Frequency
signal output
200mA Power
output
external
po tentio meter
2
1-5K
5V_IN
GND
5V
OUT
Forexternal
potentiometerpower
main-loop port
control-loop port
Relay output
3
1
Port name
Description
R S T
Single phase 220V power connect R and T.
Three phase 220V power connect R , S , T .
Voltage specifications: 8xxx, single phase 220 input
connection R and T
U V W
Three phase AC output ports can only connect to pure
resistance or inductance load such as motors or electric
heater.

A2 VFD (0.75-30kW)
8
Chapter 3 Control Panel
Button
Description
RUN
STOP
Start in operation mode running, and if press again it
stops VFD running.
STOP
RESE
T
There are different meanings to push this button during
different modes:
1.if the VFD is running, it would stop;
2. If a fault happens, the VFD would be reset;
3. If it is operated on menus, it returns to parent menu.
REV
Change the VFD’s direction. It also works during the
runtime.
SET
Press this key to enter the menu setting, if in the menu
sub item, press this key to save this menu parameter and
go to the next level menu item.
▲▼
Menu item selection and sub item data modification.
◄►
Menu item content modification selection or VFD
jogging button.
Adjustment Knob
To control the frequency.

A2 VFD (0.75-30kW)
9
Content
Description
ERROR
Fault indicator.
FWD
Forward Running
REV
Reverse Running.
ANALOG
Analog input frequency indicator.
SEGMENT
Segment input frequency indicator.
PANEL
Panel input frequency indicator.
Digital
LCD
VFD runtime frequency. If VFD stops, it flashes. The
display data is given by “Pn01” data.
Chapter 4 Parameter Set Method
4.1 Parameter set and modification
Set parameter when VFD stops and the parameter is not locked
(Pn32=1). First, enter parameter set menu by push button “SET”.
Second, push button ▲/▼to choose the certain item. Third, push
button “SET” again to enter the item. Fourth, push button ◄/► to
choose certain bit and push ▲/▼to modify the value. Finally, push
button “SET” to save the new parameter or push button “STOP” to
parent menu without any saving.
Push button “SET” to save the new parameter or push
button “STOP” to parent menu without any saving.
4.2 Button notice
When modify parameters, long push ▲/▼to rolling number
of current bit between 0-9.

A2 VFD (0.75-30kW)
VFD VFD
9
Chapter 5 Table of Configure Parameters
Item
Description
Modify by button
▲or ▼
Range
Modify by
button ▲or ▼
Default Value
Default
(3)
Default
(6)
Pn 01
Default display content
1—30000
1
1
Pn 02
Initial start up frequency by
panel or other method
0.01－400.00.00
400Hz
50
Pn 03
Source of runtime frequency
1－7
2
1
Pn 04
Source of runtime command
1－2
1
1
Pn 05
clockwise / anticlockwise
disable
1－3
3
3
Pn 06
Method to stop VFD
1－2
2
2
Pn 07
Start again by external
signal
1－2
1
1
Pn 08
Acceleration time
000.01S－650.00S
50S
10S
Pn 09
Deceleration time
000.01S－650.00S
50S
10S
Pn 10
Maximum runtime
frequency
000.10Hz－400.00Hz
400Hz
50Hz
Pn 11
Minimum runtime
frequency
000.10Hz－400.00Hz
1.5Hz
1.5Hz
Pn 12
Motor rating frequency
010.00Hz－400.00Hz
400Hz
50Hz
Pn 13
Torque compensation
0.0—4.0
0.0
0.0
Pn 14
Torque compensation
frequency
0.01Hz—600.00Hz
500Hz
80Hz
Pn 15
Startup DC braking voltage
1V—100V
30V
30V
Pn 16
Startup DC braking time
000.00S—650.00S
0S
0S
Pn 17
Stop DC braking voltage
1V—100V
30V
30V
Pn 18
Stop DC braking time
000.00S—650.00S
0S
0S
Pn 19
Source of multi-segment
speed 0
1—5
1
1
Pn 20
Multi-segment speed 1
frequency
000.10 Hz—400.00Hz
10
10
Pn 21
Multi-segment speed 2
frequency
000.10 Hz—400.00Hz
20
20
Pn 22
Multi-segment speed 3
frequency
000.10 Hz—400.00Hz
30
30
Pn 23
Multi-segment speed 4
frequency
000.10 Hz—400.00Hz
40
40

A2 VFD (0.75-30kW)
10
Item
Description
Modify by button
▲or ▼
Range
Modify by
button ▲or ▼
Default Value
Default
(3)
Default
(6)
Pn 24
Multi-segment speed 5
frequency
000.10 Hz—
400.00Hz
50
50
Pn 25
Multi-segment speed 6
frequency
000.10 Hz—
400.00Hz
60
60
Pn 26
Multi-segment speed 7
frequency
000.10 Hz—
400.00Hz
70
70
Pn 27
Point move frequency
000.10 Hz—
400.00Hz
10Hz
10Hz
Pn 28
Choice of relay output
1—6
3
3
Pn 29
2rd acceleration time
000.01S—650.00S
2S
2S
Pn 30
2rd deceleration time
000.01S—650.00S
2S
2S
Pn 31
2rd deceleration stop
frequency
000.01Hz—
400.00Hz
1Hz
1Hz
Pn 32
Parameter management
1—6
1
1
Pn 33
Software version
32029
*****
*****
Pn 34
Auto recover while lost
power suddenly
0－99Hz
0
0
Pn 35
Production date
*
*****
*****
Please refer Chapter 7 for detail description of each item
Remark：If over-voltage happens during deceleration, it will stop.
Note：
If over-voltage happens during deceleration, VFD will stop
deceleration until the voltage goes back to normal level. If better
deceleration is needed, please switch to VFD with braking.

A2 VFD (0.75-30kW)
11
Chapter 6 Description of Control Ports
Port name
Port Description
12V OUT
12V output, with maximum currency 200mA.
5V OUT
5V output, with maximum currency 50mA.
5V IN
5V input, analog input, with maximum effective
voltage 5V, no more than 6V
10V IN
10V input, analog input, with maximum effective
voltage 10V, no more than 12V
20mA IN
20mA input, analog input, with maximum effective
currency 20mA, no more than 25mA
5V Fout
Frequency signal output, maximum output voltage 5V
GND
Power source ground 0V.
FWD
External clockwise rotation input
REV
External anticlockwise rotation input
RST
External reset signal
D0 +
Multi-segment speed D0 input，external “+” signal
means clockwise point move input
D1 -
Multi-segment speed D1 input，external “-” signal
means anticlockwise point move input
D2 JOG
Multi-segment speed D2 input, external enable signal
input
Lk
Relay ON
Lb
Relay OFF
Lz
Relay ON/OFF

A2 VFD (0.75-30kW)
12
Chapter 7 Description of Configure Parameters
Pn 01 Default display content：1——30000
RUN：1 means it will display runtime frequency
Otherwise, it displays motor’s synchronization speed. 2——
30000 is motor synchronization speed
STOP：it will display frequency given by external signal.
Pn 02 Initial startup frequency by panel or other method Range：
000.01Hz－400.00Hz，the initial panel data and
external signal frequency during startup.
Pn 03 Source of runtime frequency with range：1—7
1 Potentiometer 2 Panel button
3 External 0-5V signal 4 External 0-10V signal
5 External 0-20mA signal 6 External digital signal
7 Multi-segment signal
Pn 04 Source of runtime command with range：1—2
1 Panel button control 2 External signal control
Pn 05 clockwise / anticlockwise disable with range：1—3
1 clockwise enable only 2 anticlockwise enable only
3 clockwise / anticlockwise enable
Pn 06 Method to stop VFD with range：1—2
1 stop by itself 2 stop by deceleration
Pn 07 Start again by external signal with range：1—2
1 disable 2 enable
Description: when the power on the external operation of
the signal is allowed to start effectively.
Pn 08 Acceleration time with range：000.01S－650.00S
Accelerate time (from 0Hz to Pn10).

A2 VFD (0.75-30kW)
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Pn 09 Deceleration time with range：000.01S－650.00S
Decelerate time (from Pn10 to 0Hz).
Pn 10 Maximum runtime frequency with range：000.10Hz－400.00Hz
Maximum output frequency by VFD.
Pn 11 Minimum runtime frequency with range：000.10Hz－400.00Hz
If the frequency from command below this value, VFD
will stop. It wouldn’t recover until command frequency up
this value.
Pn 12 Motor rating frequency with range：010.00Hz－400.00Hz
It is used for modify the V/Fcurve.
Pn 13 Torque compensation with range：0.0—4.0
Large parameter may cause damage to the motor.
Pn14 Torque compensation frequency：0.01Hz—400.00.00Hz VFD
doesn’t provide torque compensation if runtime
frequency is larger than this value.

A2 VFD (0.75-30kW)
14
Pn 15 Startup DC braking voltage：1V—100V
By proper tuning of this parameter, motor can start
normally from fully stop state without any difficult caused
by motor’s free motion and rotate direction.
Pn 16 Startup DC braking time：000.00S—650.00S
DC braking time before motor startup to ensure that motor
is started from fully stop state.
Pn 17 Stop DC braking voltage：1V—100V
Braking voltage during DC braking period to ensure that
motor is fully stopped in brake time.
Pn 18 Stop DC braking time：000.00S—650.00S
DC braking time to prevent the slide move after stopping.
Pn 19 Source of multi-segment speed 0：1—5
Multi-segment speed mode 0-segment frequency source：
1 Potentiometer 2 Panel button
3 External 0-5V signal 4 External 0-10V signal
5 External 0-20mA signal
Pn 20 Multi-segment speed 1 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 1-segment frequency
Pn 21 Multi-segment speed 2 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 2-segment frequency
Pn 22 Multi-segment speed 3 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 3-segment frequency

A2 VFD (0.75-30kW)
15
Pn 23 Multi-segment speed 4 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 4-segment frequency
Pn 24 Multi-segment speed 5 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 5-segment frequency
Pn 25 Multi-segment speed 6 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 6-segment frequency
Pn 26 Multi-segment speed 7 frequency：000.10 Hz—400.00Hz
Multi-segment speed mode 7-segment frequency
Pn 27 Point move frequency：000.10 Hz—400.00Hz
Point move frequency
Pn 28 Choice of relay output：1—6
1 Stop VFD 2 Run VFD
3 VFD fault 4 Frequency increasing
5 Frequency decreasing 6 Frequency reached
If output condition is satisfied, ON/OFF states reverse.
Pn 29 2rd acceleration time：000.01S－650.00S
2rd acceleration time
Pn 30 2rd deceleration time：000.01S－650.00S
2rd deceleration time
Pn 31 2rd deceleration stop frequency：000.10 Hz—400.00Hz
When runtime frequency is larger than this value,
acceleration/deceleration time is defined by Pn08,Pn09
When runtime frequency is smaller than this value,
acceleration/deceleration time is defined by Pn29,Pn30
As shown in Figure:

A2 VFD (0.75-30kW)
16
Pn 32 Parameter management：1—3
1 modification enable 2 modification disable
3 initialization for 400Hz parameters
4 read OEM initialization parameter
5 write OEM initialization parameter
6 initialization for 50Hz parameters
Note: the password for the OEM parameter is: 61633
Pn 33 Software version
Pn 34 Auto recover while lost power suddenly
0 disable this function
99 means do auto recover in infinite time, starting from
low frequency
Other value：
If indicator displays LU-X(any code) during runtime
and power source recovers in 2 seconds, VFD would
start up again and reduce runtime frequency with
magnitude of under voltage time(s) multiply
frequency of this component(Hz).
The maximum power lost time is 2.5s. Beyond this time,
it would be seen as over voltage without any auto recover.
Pn 35 Production date

A2 VFD (0.75-30kW)
17
Chapter 8 Operation Examples
8.1 Operation by panel
Pn 04 = 1(Command from panel)，Pn 03 = 1(Frequency from potentiometer)。
Push button “RUN” on the panel, VFD starts up and running indicator is on.
Push the button again, VFD would stop.
8.2 Operation by external signal
Pn 04=2 (command from port “FWD/REV”)
Pn 03=3 (frequency from port “5V”)
8.3 Multi-segment speed
Pn 04=2(command from port “FWD/REV”)
Pn 03=7(frequency from multi-segment 0-7)
8.4 Point move by panel
Command（Pn 04）must come from panel（=1）. Frequency（Pn 03）must be
specified by button（=2）.After VFD stops, push button “←” to clockwise point
move and “→” to anticlockwise point move.
8.5 Point move by external signal
Command（Pn 04）must come from port “FWD/REV”（=2）. Frequency
（Pn 03 ）must come from external digital port （=6 ）. After VFD stops,
connect “D0” and “JOG” to “GND” to point move clockwise, connect “D1” and
“JOG” to “GND” to point move anticlockwise.