Variable Frequency Drives & Digital Phase Converters

Service Department & Ordering Parts

To assist you in the best way possible, please review the options below.

(Have your serial/invoice/sales order/purchase order number available for the fastest service)

Problems with a VFD or Phase Perfect

Talk to the Service Department

866-250-7934 - Select option “2”

Help/questions with installation or setup of a VFD

Call the Sales Department

866-250-7934 - Select option “1”

Ordering Parts

Call the Service Department

866-250-7934 - Select option “2”


RMA's - Warranty Repair - Returning Equipment

IMPORTANT NOTE: 09/22/2021

The RMA process has changed with updated forms. Please read carefully!

  1. Complete the proper RMA form for your product

    ES3R, ES3R-A, SD002, SD003, SD005, SD202, SD203, SD205
    Includes 'INSPECTION FORM" that is required

    All Other Products


  2. Contact the Service Department to get your service ticket / RMA number

    866-250-7934 - Select option “2”

    Important Note:

    All equipment returns are required to have an authorized RMA number & a Phase Technologies service ticket number. 
    Any equipment or part returned without the above are subject to shipping rejection and will be returned at the owner's expense.


    Products Under Warranty

    Any warranty service or repair must follow the RMA process above and requires an authorized RMA number

    If you have warranty questions on your specific model, you can find the information in the back of each product manual or download at the link below.





Phase Technologies
222 Disk Drive
Rapid City, SD 57701
866-250-7934 Toll-free
605-343-7934 Main
605-343-7943 Fax

New Address: (as of January 2021)

222 Disk Drive
Rapid City, SD 57701

New Global Headquarters - PRESS RELEASE

Service Hours of Operation

Monday - Friday: 8:00am - 5:00PM MST
Saturday & Sunday: Closed


Call Toll-Free

866-250-7934 - Select Option "2"

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.