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MA7200 PLUS Inverter 3 to 75 HP Fan Quick Start Manual
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TECO – Westinghouse Motor Company
4
• 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.
Value
Start / Stop
Sn – 04=
Speed Reference
Sn – 05=
*0 Keypad Keypad
1 External Contact 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.