AU740SE Series  -M740 Manual Smart Water Pump Drive

User Manual

Thank you for choosing Ausenist high performance smart AU740SE water pump drive. AU740SE drive is a single phase and three phase variable frequency drive that is designed specially to manage water pump’s performance to match a wide range of water supply system conditions and requirments.

AU740SE drive allows your pump to work more efficiently,safely and smartly, reduce a large amount of energy consumption and prolong the lifetime of your pumps.

AU740SE drive is made of  high quality components and materials and adopts the latest microprocessor technology.

This manual is issued for consumers to easily and properly operate the smart AU740SE drive.The information contained in this manual is subjected to change without prior notice.

Safety Precautions

In order to ensure the proper and safe use of AU740SE drive series and avoid any possible damages on the operator,drive or pump,please affirm to read carefully the below tips before installation and operation.

·  Do not operate the equipment with power on, cut off the power and wait for at least 10 minutes before wiring and inspection,or it would probably cause electric shock.

· The main circuit terminal must be connected to the power cable tightly or it would probably cause damage on pump due to loose connection.

· Do not leave any other objects inside the drive,such as wire fragments,soldering tin,metal,etc. It would cause electric short circuit to burn out the drive.

· Do not install capacity or piezoresistor on the output end of drive,or it will cause breakdown or fault on the drive or even damage some critical components. Please remove it if there is any exsisting capacity or piezoresistor.

Selection Table

1PH 220V in 3PH 220v out Mode Power Output Current Size (mm) Installing Hole(mm)

L W H

AU740SE-2TR75A0 0.75KW 4A 150 102 118 Ø4

AU740SE-2T1R5A0 1.5KW 7A 150 102 118 Ø4

AU740SE-2T2R2A0 2.2KW 10A 150 102 118 Ø4

3PH 380V in 3PH 380v out AU740SE-4TR75A0 0.75KW 2.1A 150 102 118 Ø4

AU740SE-4T1R5A0 1.5KW 3.8A 150 102 118 Ø4

AU740SE-4T2R2A0 2.2KW 5.1A 150 102 118 Ø4

AU740SE-4T004A0 4.0KW 9A 294 131 173 Ø5

AU740SE-4T5R5A0 5.5KW 13A 294 131 173 Ø5

AU740SE-4T7R5A0 7.5KW 16A 294 131 173 Ø5

AU740SE-4T011A0 11KW 25A 294 131 173 Ø6.5

AU740SE-4T015A0 15KW 32A 337 197 193 Ø6.5

AU740SE-4T18R5A0 18.5KW 38A 337 197 193 Ø8.5

AU740SE-4T022A0 22KW 45A 337 197 193 Ø8.5

AU740SE-4T030A0 30KW 60A 348.5 227 171.5 Ø8.5

AU740SE-4T037A0 37KW 75A 348.5 227 171.5 Ø8.5

Technical Parameters

Controlling Characteristic Control Mode V/F control

Starting Torque 0.5Hz±100%

Speed Adjustable Range 1:100

Speed-holding precision ±1.0%

Overload Capability 150% rated current for 60s;180% rated current  for 1s

Acceleration/deceleration Time 0.1-3600s

Input&Output Parameters Start Frequency 0.01-10.00Hz

Input Voltage 220VAC±15%,380V±15%

Input Frequency Range 50/60Hz,fluctuation±5%

Output Voltage 0-rated input voltage

Output Frequency 0-200Hz

Peripheral Interface Digital Input 3 way of digital terminal input

Analog Input V: 0-5V

V (remote pressure gauge):0-10V

C(transducer): 4-20mA

C1(transducer):4-20mA

Replay Output 2 way output,pragrammable

Open Collection Output 1 way output,pragammable

Basic Functions Command Running Channel Three kinds of channels: 1.Operational panel 2.Control terminal,3.Serial communication port,choose 1 and 2 for master drive and 3 for auxiliaries

Built-in PID Advanced PID arithmetic to realize closed loop control system

Stall Speed Control Automatically limit current and voltage at running period to prevent tripping due to frequent overcurrent or overvoltage

Master and Auxiliaries connection Extensible RS485 design,one drive in the system can be master  and controls the other auxiliary drives (4 at most) to work by communication mode,Master drive sends PID feedback information to the auxiliary drives and monitors status of auxiliaries in real time.Any failure of the auxiliary drives does not affect the others. 

Water Shortage Protection If the drive detects the pipe pressure is lower than the water shortage pressure set value,the system stops working automatically.After set period time,it restarts automatically for specified times.If pressure restores to normal,system works normally,otherwise,system stops automatically in case of idle running of pump and prolongs pump lifetime to the maximum extent.

High Pressure Alarm When pressure exceeds set pressure,it stops running automatically to avoid damage on pipe network due to high pressure.

Automatic Energy-saving Running Automatically lower output voltage under light loading to save energy

Password Setting 4-bit password can be set with non-zero numbers,Exit password setting interface and the password will be valide in 1 minute.

Parameters Locking Define whether the parameter is locked in running or stopped status in case of misoperation.

Use Condition

Installation

Installation should be executed under the conditions of no direct sunlight,dust,corrosive gas,inflammable gas,oil mist,steam and water drop.

Altitude Lower than 1000m,service in derated capacity above 1000m.Derate 1% capacity every 100m increase in temperature.

Environment Temperature -10℃-+40℃,service in derated capacity for 40℃-50℃.Derate 4% capacity every 1℃ increase in height.

Humidity ≤95%RH,no water condensation.

Vibration <5.9m / S2(0.6G)

Keypad Description (quick use guide)

1.Indicator Lights 

PRESS. Pressure setting is valid only when the light is on

RUN Constant lighting means pump is running,while flickering means  pump is in sleep status

STOP Constant lighting means pump is in stop status.

Online Flickering means inverter is in the multi-pump control mode

Manual Light-on indicates pump runs at a given frequency set by hand

Auto Light-on indicats pump is  running in constant pressure mode

Low flow Light-on means pump is under protection against water shortage

Sleep Light-on means pump is sleeping .

2.Function button

Used to switch inverter from fixed mode to parameter setting mode

Used to set parameters and modify  pressure values

1.In setting parameters,press shift to move the blink cursor

2.In running status,press Shift to show different displays among running frequency,output current,output voltage, temperature,set pressure and running pressure

Used to start,stop pump and for reset fault.The button is invalid when the external terminal is connected.

Used to save parameters settings

Reset (back to factory default setting) by pressing               and             simultaneously

How to set parameters

The system has two parameter group: 1. U  group (function group) ,U group includes U0,U1,U2,U3 subgroups  2. d group (monitoring group)

1)At the original display status, press SHIFT to display sequently running frequency,output current,dc-link voltage,temperature and set pressure-current presure.

2)At the orignal displaly status, press MENU and hold for 3 seconds to enter U group ,press MENU again (do not need to hold for 3secs) to switch to d group

Press MENU for 3 times to return to original display status.

3)After entering U group,press “+” to enter U1.U2.U3 group. Press ENTER to the function code,press ENTER again to the parameter of the function code, press “+ “and “- “ to modify the parameter and press ENTER to save the setting.finally press MENU continually for 3 times to return to the original display status

4) Under stop/running status, press “+” / “-” and hold 3seconds to increase or decrease pressure

The following is the procedure on how to change the sensor range (U0-04) from 10bar (factory default value) to 15bar.  The procedure is the same for setting other parameters.

Single pump control mode

1.Terminal wiring diagram 

2.Debugging procedure

3.Quick operation step

1)Target pressure setting

At Stop/running status, directly press                 or             ( do not need to enter U 

parameter group) and hold for 3 seconds,then set the target pressure.. 

2)Basic parameters setting

Note: “○” means parameters can be modified at both stop and running status.

“●” means parameters can be modified only at stop status.

Function Code Description Set range Unit Default Modification Level Note

U0-02 Running Direction 0:Forward

1:Reverse

2: Forbidden 0 ○

U0-03 Sensor type 0:  (0-10)

1:  (4-20)

5:  (4-20)

V

mA

mA

1 ● 0: V termial

1: C termial

5: C1 terminal

U0-04 Sensor  Range 0.0-60 Bar 10 ○

U0-05

Press. Calibration (0~2.000) 1.000 ○

Below is parameters needed to set based on user’s requirement

Function Code Description Set range Unit Default Modification Level Note

U0-01 Start press. setting 0-target press. Bar 2.4 ○ 80% of target press.

U1-05 High press. alarm value 0-60.0 Bar 15.0 ○

U0-10 Start / Stop command 0:keypad

1:External control 2:Communication 0 ○ When use external switch on/off, 

set U0-10=1

Multi-pump control 

1. Terminal wiring diagram 

In two master and multi slave pumping system,master and standby master drive are  connected to pressure sensors as below: