Savch S900 Series User manual

S900 Series Inverter
Multi Function Mini Type (IM)
User Manual
User Manual

S900 Series Inverter
Multi-function Mini Type (IM)
User Manual
File No. 520000009075
Vision No. V1.5
Filing time 2020-11-16
SAVCH electric provide a full range of technical support for our customers.
All users could contact with the nearest SAVCH office or service center,
also could contact with our headquarters directly.
SAVCH Electric reserves the copyrights and all rights,
Subject to change without further notice.

Contents
PREFACE................................................................................................................................................................ 1
Ⅰ.SAFETY INSTRUCTIONS................................................................................................................................... 2
1. NOTES FOR OPERATION............................................................................................................................................... 2
2. NOTES FOR OPERATION ENVIRONMENT................................................................................................................ 4
Ⅱ. DESCRIPTIONS FOR BODY AND INSTALLATION .......................................................................................... 5
1. OPERATION ENVIRONMENT........................................................................................................................................ 5
2. MODEL DESCRIPTION.................................................................................................................................................... 6
4. LIST OF APPLICABLE NO-FUSE BREAKER............................................................................................................ 9
5. APPLICATION AND DESCRIPTION FOR AMBIENT EQUIPMENTS................................................................... 10
6. BASIC WIRING DIAGRAM............................................................................................................................................ 13
7. EXTERNAL DIMENSIONS............................................................................................................................................. 15
Ⅲ. DESCRIPTION OF OPERATION PANEL..........................................................................................................16
1. DESCRIPTION FOR DIGITAL OPERATION PANEL................................................................................................ 16
2. DESCRIPTION OF PANELOPERATION..................................................................................................................... 18
3. PRELIMINARY OPERATION-NOT CONNECTING WITH MOTOR....................................................................... 19
Ⅳ. LIST OF DESCRIPTIONS FOR FUNCTIONAL PARAMETERS........................................................................21
Ⅴ. DESCRIPTION OF FUNCTIONAL PARAMETERS...........................................................................................32
0. USER'S PARAMETERS................................................................................................................................................. 32
1. BASIC PARAMETERS ................................................................................................................................................... 35
2. OPERATION MODE PARAMETERS........................................................................................................................... 39
3. OUTPUT FUNCTION PARAMETERS......................................................................................................................... 43
4. INPUT FUNCTION PARAMETERS.............................................................................................................................. 48
5. MULTI-STEP AND AUTO-PROGRAM OPERATION PARAMETERS................................................................... 54
7. SPECIAL PARAMETERS............................................................................................................................................... 59
8. HIGH FUNCTION PARAMETERS................................................................................................................................ 60
9. COMMUNICATIONS PARAMETERS.......................................................................................................................... 63
A. WOBBLE FREQUENCY FUNCTION PARAMETERS............................................................................................. 73
Ⅵ. TROUBLE SHOOTING.....................................................................................................................................76
1. ALARM AND CORRECTIVE MEASURES................................................................................................................. 76
2. TROUBLESHOOTING FOR FAULTS IN GENERAL................................................................................................ 78
Ⅶ. MAINTENANCE AND AMBIENT ELEMENTS...................................................................................................79
Contents 1.............................................................................................................................................................81
1. Basic wiring diagram .................................................................................................................................................... 81
2.Control Circuit Terminal Position Map..................................................................................................................... 82
3.List of Brake Resistor .................................................................................................................................................... 82

1
PREFACE
Thanks for your use of SAVCH inverter! This instruction manual, which includes operation descriptions and notes for
maintenance, shall be delivered to the end-user.
For safety running and effective operation, this instruction manual shall be read thoroughly prior to use, which shall
also be preserved for later use.
Provided problems occur and solution is not provided in this instruction manual, contact your SAVCH Electric
representative or contact with our company directly. Our professional technicians will serve for you actively. And
please continue to adopt products of SAVCH, give valuable opinion and advice.
1. Reading Instructions
Symbols of” WARNING” and” CAUTION” in the manual indicates that, for safety running or maintenance of inverters
or other electrical products, attention shall be attached during delivering, installation, operation and checks for the
inverter.And these notes shall be applied for a better and safer operation.
WARNING
Indicates a potentially hazardous situation visiting. If not used correctly, personnel
damage even death may be caused.
CAUTION
Indicates a potentially hazardous situation visiting. If not used correctly, serious
damage to inverter or machine may be resulted.
WARNING
● Do not touch circuit board and other components after power supply off and CHARGE indicators are still ON.
● Never connect wires while power on. Do not check components or signal for circuit board during operation.
● Do not dismantle or change inner wire, circuit or components unnecessarily. Make sure grounding terminals
are correctly grounded. 200V class: Grounding Ⅲ; 400V class: Special Grounding.
CAUTION
● Do not perform a insulation test and withstand voltage test by megohmmeter, it can cause semi-conductor
components to be damaged by high voltage.
● Never connect the output terminals U, V, W to AC power supply.
● IC of CMOS on control circuit of the inverter shall be damaged by electrostatic influence. Do not touch main
circuit board.
2. Products receiving
All products have been performed with strict test and inspection. After receiving the inverters, the following checks
shall be performed.
● To check that SAVCH inverter, an instruction manual.
● To check whether model number correspond with model and capacity your purchase order.
● To check whether there are damaged parts during transportation and delivering. If there are, do not connect with
power supply.
If any of the above checkpoints are not satisfactory, contact your SAVCH representative for a quick resolution.

2
Ⅰ.SAFETY INSTRUCTIONS
1. NOTES FOR OPERATION
Before wiring
CAUTION
● Specification of applying power supply shall correspond to input voltage of the inverter.
WARNING
● Main circuit terminals must be correct, L1/R, L2/ S and L3/ T is input terminals and it’s forbidden to use
mixing with U, V and W. Failure to observe this may cause the inverter damaged.
CAUTION
● When delivering the inverter, do not take the cover directly. Take the air fan seat to prevent the cover
got off. Inverters getting off which may cause damage to personal or machine shall be avoided.
● Install the inverter on metal or other non-inflammable materials. Do not fix it on inflammable materials
which may cause a fire hazard.
● In case of several inverters are installed together in one control panel, a fan shall be prepared to make
sure temperature lower than 40℃, thus over-heating or a fire hazard shall be avoided.
● Make sure applied power supply comply with label showed on the right of the machine. Failure to
observe this may cause action failure.
During operation
WARNING
● Never put in or take off the motor during operation, otherwise over-current even over burning the main
circuit of the inverter may happen.
● When auto-restart function is set, do not approach the machine since motor can be reset suddenly after
being stopped.
● The function set can make the stop key invalid, which is different from the emergency stop key. Please
pay attention to it.
CAUTION
● Never touch heat sink or discharging resistor since temperature may be very high.
● Since it is easy to change running speed from low to a high speed, verify safe working range of motor
and machine before running.
● Use brake unit according to the method described in wiring diagram.
● Do not check signals during running.
● All parameters of the inverter have been preset at the factory according to line frequency. Do not
change the setting value at will.

3
During check and maintenance
CAUTION
● Ambient temperature for operating the inverter shall be -10℃to + 50℃(+40℃parallel installation) and
90%RH no condensation. However under this condition, the ambient environment must be without
drips of water or metal dust.
During Disposal
CAUTION
● Explosion may occur when burning the electrolytic capacitor of the main circuit and printing plate. Toxic
gas may be generated when burning control keypad and other plastic fittings. It shall be treated as
Industrial waste.

4
2. NOTES FOR OPERATION ENVIRONMENT
Do not use the inverter in an environment with the following conditions：

5
Ⅱ. DESCRIPTIONS FOR BODY AND INSTALLATION
1. OPERATION ENVIRONMENT
Since operation environment can directly influence functions and operation life, to ensure proper performance and
long operation, follow the recommendations below when choosing allocation for installing the inverter. Make sure it is
protected from the following:
Extreme cold and heat.
Use only with the ambient temperature range: -10℃to +50℃(+40℃parallel installation)
Rain, moisture
Direct sunlight.(Avoid using outdoors)
Corrosion of oil sprays or salt
Corrosive fluid and methane
Dust or metallic particles in the air
Radioactive materials and inflammable materials
Electromagnetic interference (Avoid using together with welding machine or dynamic machines.)
Vibration
(If inverter must be used in this environment, an anti vibration pad is necessary).
Attention shall be attached to clearance of inverters allocated closely. A fan shall be installed to make sure
temperature is lower than 50℃
INSIDE THE CABINET
Wrong configuration
AIR EXCHANGE
FAN
INSIDE THE CABINET
INSIDE THE
CABINET
Correct configuration Wrong configurationCorrect configuration
INSIDE THE CABINET
AIR EXCHANGE
FAN
For cooling off, face shall be toward front and upper parts shall be upwards.
Clearance shall meet the following specifications:
(a)FRONT
Inverter
DIRECTION
OF
INSTALLATION
12cm 12cm
12cm
12cm
5cm
(b)SIDE
VENTILATION
-10-+40℃

6
2. MODEL DESCRIPTION
TYPE：S900-4T1.5G
INPUT：AC 3PH 380~460V 50/60Hz
OUTPUT：3PH 0~460V 3.2KVA 4.2A
FREQUENCYRANGE：0.1~400Hz
Designed by Taiwan Savch Electric
Model
Input power supply Spec.
Output power supply Spec.
Output frequency
Product
series
S 900 - 4T 1.5 G B
0.2：0.2kW
0.4：0.4kW
0.75：0.75kW
1.5：1.5kW
2.2：2.2kW
3.7：3.7kW
SAVCH G：Constant torque
load(for general use)
2S：220V
Single phase
4T：440V
Three phase
B：Inverter Model with
built-in brake resistor

7
3. SPECIFICATIONS
Product Specifications
■ 200V Single Phase Series
Model number S900-2S□□□G
0.2
0.4
0.75
1.5
2.2
Output
Max applicable motor output power(kW)
0.2
0.4
0.75
1.5
2.2
Max applicable motor output power(HP)
0.25
0.5
1
2
3
Output rated capacity(kVA)
0.6
1.0
1.9
2.5
4.2
Output rated current (A)
1.6
2.5
4.2
7.5
11
Output frequency range
0.1 to 400Hz
Over load capacity
150% of rated output current and run for 60sec.
Max output voltage
Correspond to input power supply
Input
Phase number﹒Voltage﹒Frequency
Single phase. 200 to 240V. 50/60Hz
Allowable variation range for Voltage﹒
Frequency
Voltage: ±10%, Frequency: ±5%
Power capacity needed (kVA)
1.1
1.5
2.2
3.9
6.0
Input current (A)
4.9
6.5
10
17.5
27
Cooling System
Natural cooling
Fan cooling
■ 400V Three Phase Series
Model number S900-4T□□□G
0.4
0.75
1.5
2.2
3.7
Output
Max applicable motor output power(kW)
0.4
0.75
1.5
2.2
3.7
Max applicable motor output power(HP)
0.5
1
2
3
5
Output rated capacity(kVA)
1.2
2.3
3.2
4.2
6.3
Output rated current (A)
1.5
2.5
4.2
5.5
8.2
Output frequency range
0.1 to 400Hz
Over load capacity
150% of rated output current and run for 60sec.
Max output voltage
Correspond to input power supply
Input
Phase number﹒Voltage﹒Frequency
Three phase. 380 to 460V. 50/60Hz
Allowable variation range for Voltage﹒
Frequency
Voltage: ±10%, Frequency: ±5%
Power capacity needed (KVA)
1.3
2.3
4.0
4.8
6.0
Input current (A)
1.9
3.5
6.0
7.2
9.0
Cooling System
Natural cooling
Fan cooling

8
■ Standard Specifications
Controlling Characteristics
Control mode
Adopting SVPWM or SPWM modulating techniques
Output frequency range
0. 1 to 400Hz
Frequency setting analyzing degree
0.1Hz
Output frequency analyzing degree
0.1Hz
PWM carrier frequency
Available to modulate from 2 to 12kHz.
Torque increase
Auto torque-increase and auto slip compensation, at 5Hz the
starting torque can reach 150% of rated torque.
Jump frequency
3 points can be set from 0.1 to 400Hz
Acceleration/deceleration time
0.1 to 600 seconds. (2 steps of accel/decel time can be set
separately.)
DC braking
Available to be operated from 0.1 to 60.0Hz from STOP, braking
current 0 to 100% of the rated current. Starting time 0 to 60.0 sec.
Stopping time 0 to 60.0 sec.
V/f curve
V/f curve available to be set
Operation Characteristics
Frequency
setting
signal
Digital operation panel
Set by UP and DOWN keys
External signal
Potentiometer 5KΩ, 0 to 10VDC, multi-function input choosing 3 to
5 (7 velocities: jog-on, up/down command), serial communication
(RS485)
Running
operating
signal
Digital operation panel
Available to be operated by 【RUN】, 【STOP】keys.
External terminals
2 wire style (Fwd/Stop, Rev/Stop, Run/Stop and Fwd/Rev)/ 3 wire
operation, JOG running, Serial Communication Port(RS485)
Custom Input Terminal
Switching of 7 step pre-set available speed; Switching of
First/Second acceleration/deceleration time; prohibiting
acceleration/deceleration and external interrupt input; Jog running
UP/DOWN frequency terminal setting; Count terminals
Custom Output Terminal
During running, frequency arrival output, non-zero count agreement
output, over torque output, external interrupt reference, low voltage
detection, operation mode reference, fault output and external fault
interruption.
Analog signal output
Corresponding to output current, output frequency 1( before slip
ratio compensation), output frequency 2( after slip ratio
compensation), output voltage, consumed power, DC bus voltage
Built-in Function
Setting max/min output frequency; momentary power off restarting;
fault restarting; setting of S curve acceleration/deceleration time;
auto-voltage stabilizing output modulation; digital frequency output
signal; fault records; parameters locking; reset to factory setting;
inhibiting reverse run; over current stalling prevention, over voltage
stalling prevention, electronic thermal relay.
Protection Function
Over current; over voltage, low voltage;’ external fault interruption
input; motor over load; over load of the drive and drive overheating
Digital operation panel
Consisting of 6 functional keys, 7 step LED in 4 digits; 4 status LED
indicators. Available to set frequency, display actual output
frequency, output current, self-determined unit parameter overview
of users, modify settings and for parameter locking, fault displaying.
Available to perform running, stop, reset, fwd/rev run

9
Environment
Operational Environment
temperature
-10℃to +50℃(+40℃parallel installation, no condensation, no
freezing)
Storing temperature
-20℃to +60℃
Operational Environment dampness
Below 90%RH without moister
Installation height
Lower than 1000m, without corrosive gas, fluid and dust.
Vibration
Under 20Hz 9.80665m/s2(1g), 20 to 50Hz 5.88 m/s2 (0.6g)
Protection level
IP20
SAVCH ELECTRIC shall not be responsible for faults due to the following:
(1) Absence or inapplicable or over large non-fuse breakers was put between the power supply and the inverter,
which results in the inverter fault.
(2) Magnetic contactors or advance capacitor or Surge Absorber were connected in series between the inverter and
motor.
● A three phase squirrel-cage induction motor which corresponds with the capacity of the inverter shall be adopted.
● If more than one motors were driven simultaneously by one inverter, the current of these motors when running shall
below capacity of the inverter. And each motor shall be prepared with a thermal relay in appropriate capacity.
● Phase advance capacitors and other capacity elements such as LC or RC shall not be fixed between the inverter
and motor.
4. LIST OF APPLICABLE NO-FUSE BREAKER
The wire size recommended to main circuit terminals is to use single-stranded HIV wire (max. allowable temperature
75℃) under ambient temperature of 40℃. The content in ( ) is the example of single-stranded IV wire (max.
allowable temperature 60℃).
Type
S900-2S
single-phase series
Suitable
power of
motor (kW)
Rated
current of
breaker (A)
Main circuit (mm2)
Control
circuit (mm2)
Input wire
Positive and
negative bus
Output
wire
Grounding
wire
Control
terminal wire
S900-2S0.2G
0.2
10
1
1
1
2
1
S900-2S0.4G
0.4
15
1.5
1
1
2
1
S900-2S0.75G
0.75
20
2.5
1
1
2
1
S900-2S1.5G
1.5
40
4
1.5
2.5
2
1
S900-2S2.2G
2.2
50
5.5
1.5
2.5
2
1
Type
S900-4T
three-phase series
Suitable
power of
motor (kW)
Rated
current of
breaker (A)
Main circuit (mm2)
Control circuit
(mm2)
Input wire
Positive and
negative bus
Output wire
Grounding
wire
Control
terminal wire
S900-4T0.4G
0.4
5
1
1
1
22
1
S900-4T0.75G
0.75
10
1
1
1
22
1
S900-4T1.5G
1.5
15
1.5
1
1.5
22
1
S900-4T2.2G
2.2
15
1.5
1.5
1.5
22
1
S900-4T3.7G
3.7
20
2.5
1.5
2.5
22
1

10
5. APPLICATION AND DESCRIPTION FOR AMBIENT EQUIPMENTS
Power supply：
●Make sure voltage class is correct, otherwise inverter may be damaged.
●A no fuse breaker (air circuit breaker) shall be provided between AC supply and
inverter.
No fuse Breaker：
●Circuit breaker which complies with rated voltage and current of inverter shall be
applied as ON/OFF control for inverter. And it shall also be protective to the
inverter.
●Never use circuit breaker as ON/OFF switch for inverter.
Leakage Breaker：
●A leakage breaker shall be installed to prevent mal-functioning and to ensure the
safety of operators; to prevent the mal-functions, those of which the sensitivity
current above 200mA and action time above 0.1 sec shall be applied.
Magnetic Contactor：
●Inverters can be used without a magnetic contactor (MC) installed at the power
supply side. However, when used for external control or automatically restart after
power off, or when braking control is used, a magnetic contactor shall be applied.
●Do not use the magnetic contactor as RUN/STOP switch for inverter.
Power Improving AC Electric Reactor：
●When the output capacity is greater than 500KVA or enter-wire electricity
capacity acts, the instant jump of voltage or current will be produced, resulting to
damage the internal circuit. So it is recommended that an AC electric reactor is
installed additionally to improve function factors and decrease the power
harmonic. The wiring distance is within 10m.
Input side radio interference suppression Filter：
●The Input side radio interference suppression filter must be applied if inverter
has electronic induction load around.
Inverter：
●Input Power supply terminals R/L1, S/L2 and T/L3 can be connected without
phase sequence.
●Connect output terminals U, V and W to U, V and W of motors, if the inverter is in
forward run reference, while motor reverse runs, change any two of U, V and W.
●Never connect U, V, W to AC Power supply otherwise inverter may be damaged.
●Grounding terminals shall be grounded correctly. Category ⅢGrounding：below
100Ω，Special grounding：below 10Ω.
Zero radio interference suppression filter
●If specialized radio interference suppression filters are fit at inverter output side,
radiation interference and induction interference shall be decreased.
Input side
Noise Filter
Inverter
No fuse Breaker
Power supply
Magnetic
Contactor
Power Improving
AC Electric Reactor
Three Phase
Squirrel Cage
Motor
Grounding
Zero Phase
Noise Filter

11
Wiring shall be checked whether correct or not. Peripheral wiring shall fulfill the following requirements.
(Do not use a buzzer of control circuit to check wiring)
(A) Wiring for control circuit Power supply must be isolated or far from other high voltage wirings or high current
power lines, thus electromagnetic interference can be avoided. See diagrams below:
●Individual power supply bridge for inverter
Electromagnetic
Contactor
Power
supply
IM
Inverter
●If inverter power supply circuit is used commonly
with other machines, inverter-specialized noise filter or
isolating transformer shall be added.
Inverter
Electromagnetic
Contactor
Machine
Electromagnetic
Contactor
Power
supply Invert
er
filter IM
Electromagnetic
Contactor
IM
Inverter
Machine
Isolated transformer
Power
suppy
●Good effect may not be received if general use noise
filters are applied
Electromagnetic
Contactor
Power
supply
IM
Inverter
Machine
Anti-
interferen
ce filter in
general
use
Electromagnetic
Contactor
×
Electromagnetic
Contactor
Power
supply
IM
Inverter
Machine
Electromagnetic
Contactor
Anti-
interferen
ce filter in
general
use
×
● Interference during transmission can be prohibited by adding an inverter-specialized radio interference
suppression filter at main circuit output side. For preventing electromagnetic radiation, a metal tube shall be
installed, and distance from signal wiring of other control machines shall be 30cm at least.
SIGNAL WIRE
IM
30cm Above
Power
supply
Electromagnetic
Contactor
Iron Box
Inverter
Noise
filter
Noise
filter
Control
Device

12
● Voltage drop of wiring shall be considered providing that inverter and motor are with an excessive distance.
Voltage drop (V) =
3
× wiring resistance (Ω/km) × wire length (m) ×current (A) ×10-3, carrier frequency shall be
modified according to wiring prepared.
Distance between inverter and motor wiring
Below 50M
Below 100M
Above 100M
Allowable carrier frequency
Below 12kHz
Below 9kHz
Below 6kHz
Set value for parameter 2-09
12
9
6
(B) Wiring for control circuit shall be isolated or far from main circuit wiring or other high voltage/current power lines,
thus electromagnetic interference shall be avoided.
● For preventing inductive interference and malfunction, shielded twisted pair shall be used for control circuit.
Shielding layer shall connect grounding terminals.
Armor
Shielding Layer
Never connect
Insulate these parts
with insulation tape
To ground terminal
Distance for wiring shall be 50m or less.
(C) Grounding terminal for inverters shall be grounded properly. Below 100Ω: Category ⅢGrounding; Below 10Ω:
Special grounding
● AWG shall be taken as standard for ground wire. Ground wire shall be as short as possible.
● Never ground simultaneously for Inverter ground wire with other large current load (such as welding machine or
large Power motors). They shall be grounded separately.
● Ground circuit shall be avoided when several inverters are grounded simultaneously.
(a) CORRECT (b) CORRECT
(c) FALSE
(D) Cable line width for main circuit and control circuit shall be selected according to power line standard.
(E) After completing of grounding and wiring, check for the following items: wiring is proper; wire is not broken and
screws are securely tightened.

13
6. BASIC WIRING DIAGRAM
Wiring of AC motor drive can be divided into two parts, the main circuit and control circuit. Users must connect
terminals as diagram shows.
The following diagram is the standard wiring diagram of S900 seriesAC motor driver.
Note: RS485 may damage the terminal of connector side. So the terminal configuration has to be confirmed before
connection. The used signal wire can be cut if necessarily.

14
Description for S900 Series Inverter Terminals
Main circuit terminal descriptions
Terminal symbols
Function
L1/R,L2/S,L3/T
Main circuit AC power supply input(For single phase input, connect to L1/L and L2/N)
U,V,W
Connect to motor
(+), (-)
Connect to braking module
For grounding (High voltage wave impact and noise interference shall be avoided.)
Terminal Symbol Description
Terminal symbols
Function of Terminal
Specification
RA-RC
Multifunctional reference signal output
contactor
See Description 3-05 for RELAY CONTACTOR
RB-RC
Multifunctional reference signal output
contactor
MI1-DCM
Fwd run/ Stop
See Description 4-04~4-08
MI2-DCM
Rev run/ Stop
MI3-DCM
Multifunctional input option 1
MI4-DCM
Multifunctional input option 2
MI5-DCM
Alarm reset
MO1-MCM
Multifunctional output terminal
See description of 3-09 (Open collector output)
+10V-ACM
Power supply for speed setting
Speed reference power supply (+10V)
AVI/ ACI -ACM
Analog voltage frequency reference
(0~+10V/4~20mA) Max output frequency
AFM-ACM
Analog frequency/ current meter
0~ +10VDC, Max +11V/output frequency
RS485 serial
communication
Serial connected communications port
RS485 Serial connected communications
connector
+24V-DCM
Assisted control power supply
DC 20V-26V (20mA Max)
Please use Shielded Twisted Pair to insulate the control signal wire.
Note: RS485 may damage the terminal of connector side. So the terminal configuration has to be confirmed before
connection. The used signal wire can be cut if necessarily.

15
7. EXTERNAL DIMENSIONS
Figure 7-1 Dimension and installation size of S900-2S0.2G~0.75G/S900-4T0.4G -1.5G (unit: mm)
Figure 7-2 Dimension and installation size of S900-2S1.5G~2.2G/S900-4T2.2G -3.7G (unit: mm)

16
Ⅲ.DESCRIPTION OF OPERATION PANEL
1. DESCRIPTION FOR DIGITAL OPERATION PANEL
The digital operation panel has two spaces: display space and operating space. Parameters setting and different
operation states shall be displayed on the display space, while for the operating space, it is an interface for
communication of the operators and AC motor inverter.
LED indicator light
Mode switch /
fault reset key
Data display space
(LED four digit-digital tube)
Confirm key for
parameter / data modify Stop key
Increment key Decrease key
Operation key
Potentiometer knob
for frequency setting
Key function description
MODE/RESET
In normal operation mode, various states information of the AC motor drive, such as frequency
reference and input current, shall be displayed by pressing this key; in various operative modes
of the parameter setting, the machine shall reset by pressing this key; Press this key to reset the
error when error occurs
ENTER
After selecting appropriate operation or program mode, i.e. parameters must be replaced (This
key shall be available regardless the AC motor drive is in operation or stop), program mode shall
be realized by pressing this key; as an ENTER key for parameter setting, if this key is pressed in
program mode, modified parameters shall be taken into memory by the system.
RUN
To start operation (Pressing this key is invalid when set as external terminal control)
STOP
To stop operation
UP/DOWN
For modifying data or parameter programs
If pressing this key for long time, for a short time then released, all modified parameters shall be
alternated step by step;
If pressed it for a long time and not released, all modified parameters shall alternate quickly.

17
Description of indicator light
RUN Operation indicator light: it will light on when the inverter is in operation state.
STOP Stop indicator light:: it will light on when the inverter is in stop state.
FWD Forward indicator light: it will light on when the rotating direction of inverter is forward.
REV Reverse indicator light: it will light on when the rotating direction of inverter is reversal.
Note: In the following several states, indicator lights are combined to indicate the inverter state.
● Set the inverter to operate, RUN indicator light is on and STOP flickers when the output frequency is 0.
● Set the inverter to stop, RUN indicator light flickers and STOP is on when the output frequency hasn’t decreased to
0.
● If it is necessary to set the inverter to do the reverse operation when it is in forward operation state, stop the
forward operation first, then start the reverse operation. The FWD indicator light flickers and REV is on before the
forward rotating stops.
● If it is necessary to set the inverter to do the forward operation when it is in reverse operation state, stop the
reverse operation first, then start the forward operation. The FWD indicator light is on and REV flickers before the
reverse rotating stops.
Descriptions of Functional Displaying Project
Display Project
Description
Showing the current set frequency of inverter.
Displaying actual frequency output from inverter to motor
Displaying physical quantity(U) defined by users (U=H*×0-05)
Displaying count value(C) of internal counter
Displaying output current of U, V and W at output side of the inverter
Displaying parameter project. Content of this parameter shall be displayed by pressing
ENTER.
Displaying parameter content value. Modified materials shall be stored by pressing ENTER.
If END information (as diagram left shows) lasts for about 1 sec, it means that data has been
received and memorized automatically. If data needs modifying, it shall be completed by
acting directly with UP / DOWN and depress ENTER key again.
This interface will be displayed when setting parameters are not received.