12
Setting VFD Parameters
VFD Keypad:
The keypad is an easy means for diagnostics of the VFD(s). The keypad is simply connected to the
diagnostic interface on the front of the VFD(s). The AFC-DCV is supplied with one keypad and is interchangeable
between VFD’s during operation for diagnostics.
Note:
The VFD(s) are pre-programmed per your job specifications
prior to leaving the factory and should not require additional programming. If changes are necessary or errors are
displayed, please contact technical support @ 800-322-4036.
Enter/Save
Scroll Up
Scroll Down
Return
Depress “Enter” once to enter Parameter Group. Depress “Enter” again for parameters within the group.
Depress “Scroll Up” or “Scroll Down” to desired parameter. If .XX is displayed after a parameter, depress “Enter”
again and then depress “Scroll Up” or “Scroll Down” to reach desired parameter.
Depress “Enter” and the parameter setting will be displayed.
To change parameter, “Scroll Up” or “Scroll Down” to desired setting.
Depress “Enter” and hold for 3 seconds until “Save” is no longer flashing to save parameter to the desired setting.
Depress “Return” to exit back to Run/Stop screen.
Monitor Amps:
Connect the keypad to the VFD controlling the fan to be monitored. Using the above instructions,
navigate to parameter P104. This will display the actual amperage of that motor. Depress “Return” to return to the
previous menu.
Adjusting Max Speed:
The max Exhaust speed will need to be adjusted if the MUA cannot maintain correct
pressure.
Connect the keypad to the VFD controlling the fan to be adjusted. Using the above instructions, navigate
to parameter P430.03. This will display 60HZ. If the fan speed needs to be adjusted, depress the “Scroll Down”
button to lower the max HTZ of the fan. Depress “Enter” button and hold until “Save” is no longer flashing. Depress
“Return” to return to main screen. When adjusting “Max. Speed”, avoid large adjustments. Lower the HZ by
increments of 1HZ at a time. Allow several seconds between adjustments for the pressure to stabilize. Recheck to
verify that the fan is running at the highest Hz possible and the Pressure Display is maintaining a steady green on
the color display. If MUA is not running at 100%, the Exhaust Hz should be increased slightly using the same
adjustment procedures as mentioned before. This will ensure that the system is exhausting the absolute maximum
possible.
Motor Power Changes:
Connect the keypad to the VFD controlling the fan to be monitored. Using the above
instructions, navigate to parameter P208.01. This will display the incoming line voltage that the VFD has been
programmed for. If the setting for the fan input power needs to be changed, depress the “Scroll Up” or “Scroll
Down” button to change line voltage. A 208-230 selection will be displayed as 230. Depress “Enter” button and hold
until “Save” is no longer flashing. Depress “Return” to return to main screen.
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