Westinghouse Power Supply MA7200 2003 N1 Thru MA7200 2040 N1 User Manual

MA7200 PLUS INVERTER  
SERIES  
FAN Quick Start Manual  
3 to 75 HP  
Models- MA7200-2003-N1 Thru MA7200-2040-N1 (230V)  
&
MA7200-4003-N1 Thru MA7200-4075-N1 (460V)  
Rev. 1.3 - May 27th 2008  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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Step 4 - Check Fan Motor Operation  
Enter 10.00Hz for the frequency reference and set parameter Sn-08 = 1 to disable Reverse  
Direction operation. Note: The output from the inverter is displayed in Hz as factory default. If  
desired, the output may be displayed in per cent (%) of full speed. (see appendix)  
to  
;
0
1
1 - Press the  
2 - Press the  
key twice  
key  
Flashing  
Flashing  
3 - Press the  
2 Seconds  
key to  
.
1
Flashing  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
_______________________________________________________________  
Press the RUN key, and check the fan direction of rotation. If the direction is not correct, press  
the STOP key and wait until the fan has come to a complete STOP. Next, power down the  
inverter.  
Danger  
After the power has been turned OFF, wait at least 5 minutes until the charge  
indicator extinguishes completely before touching any wiring, circuit boards or  
components.  
Reverse any two of the fan motor connections at the inverter ( U(T1),V(T2), or W(T3) ). Next,  
following STEP 2, power-up the inverter; the motor direction should now be correct.  
Step 5 – Select Method of Control  
Before selecting the method of control, verify that the inverter is in the STOP mode.  
There are two methods of control or combinations thereof that may be selected; Keypad, and  
Analog Signal.  
RUN / STOP Command - Can be provided from the keypad or from an external contact  
(see Fig. 2a).  
Speed Reference – Can be from the keypad or from an external analog signal (0 – 10 VDC or  
4 – 20 mA). see Fig’s 3a,3b, and 3c.  
The RUN/STOP method of control is set by parameter Sn – 04 and the Speed Reference is set  
by parameter Sn – 05. The following table shows the values to be set when selecting.  
Start / Stop  
Sn – 04=  
Speed Reference  
Value  
Sn – 05=  
*0  
1
Keypad  
External Contact  
Keypad  
External Analog  
* NOTE  
The factory default for both Sn – 04 and Sn – 05 are set to =0; Digital Operator (Keypad).  
No further parameter changes are necessary if this is the desired method of control. If  
either External Contact set by Sn – 04 or External Analog set by Sn – 05 are desired (or  
both) then proceed as follows.  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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After the method of control has been selected, if external control wiring is required, (e.g. external  
analog) power down the inverter before removing any covers or making any connections.  
In the following pages are wiring examples for Start / Stop, E-Stop, Restart, and Analog  
Connections.  
Danger  
After the power has been turned OFF, wait at least 5 minutes until the charge  
indicator extinguishes completely before touching any wiring, circuit boards, or  
components.  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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DIGITAL INPUT / OUTPUT terminal connections ( 3 – 75 HP )  
Fig’s 2a, 2b, and 2c below show the control terminal connections for input control functions. The  
connections shown are typical and the user is referred to the MA7200 PLUS Manual if additional  
information is required. Fig. 2d shows an example for the use of the Fault Output Relay.  
STOP  
RUN  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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ANALOG INPUT terminal connections ( 3 – 75 HP )  
Fig’s 3a, 3b, and 3c.show the various analog input schemes that can be used to control the  
output frequency and thus the speed of the fan motor when External Analog is selected by  
Sn-05 in Step 5. Only one method may be used as the input source with Fig. 3a Potentiometer  
Input being most common.  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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MA7200 PLUS BLOCK DIAGRAM  
Fig. 4 is an overall basic electrical connection diagram for MA7200 PLUS inverters rated 3 to 75  
HP. It is used in conjunction with the other sections of this guide to give the user the  
ability to successfully start up a Fan application. More detailed information is available in the  
MA7200 PLUS Manual to which the user is referred if further information is required.  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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Appendix A-  
Changing display to read output speed in percent (%) of full speed.  
The display is factory defaulted to show the inverter output frequency in Hz. If desired, the  
display can be changed to show the output frequency as a percentage of full speed. To do this  
parameter Cn-28 must be changed from (00000) to (00001) as follows:  
To set parameter Cn-28 = 1  
(Display Percent)  
Resulting Display  
Keypad Steps  
PRGM  
An – 01 -  
key  
1 - Press the  
DRIVE  
Freq. Cmd. 1  
Cn – 01 -  
Input Voltage  
DSPL  
2 - Press the  
3 - Press the  
key 3 times  
Cn-28-  
key until display shows  
Operator DSPL Unit  
Flashing  
EDIT  
Cn-28 = 00000  
4 - Press the  
key  
ENTER  
Operator DSPL Unit  
Flashing  
Cn-28 = 00001  
5 - Press the  
6 - Press the  
key  
Operator DSPL Unit  
Flashing  
EDIT  
key to save  
Entry Accepted  
2 Seconds  
Flashing  
ENTER  
Cn-28 = 00001  
Operator DSPL Unit  
PRGM  
DRIVE  
7 - Press the  
key to return to the main display.  
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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual  
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Appendix B -  
Removing the LCD Digital Operator and Inverter Cover(s)  
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