Stairmaster SM916 Stepmill Relay Board Testing

 

How to Test the Relay Board on a Stairmaster SM916 Stepmill

This procedure covers the steps necessary for testing the relay board on a Stairmaster Stepmill SM916.

Tools:

  • Jumper Wire

Procedure:

  1. Disconnect power from the machine.
  2. Disconnect the main cable from the relay board J1 terminal.
    1. The main cable should remain disconnected for the duration of the relay board tests.
  3. With the Power ON, place a jumper wire across the GND/BLK and RLY/RED test points. (Ensure jumper wire only makes contact with the designated test points.)
    1. Verify that the Relay LED is lit.
      1. Remove jumper wire.
  4. With the Power ON, place jumper wire across the +/WHT and FLD/BRN test points. (Ensure jumper wire only makes contact with the designated test points.)
    1. Verify that the Field LED is lit.
      1. Remove jumper wire.
  5. With the Power ON, place jumper wire across the +/WHT, and with the other end touch the ALT/C.
    1. Verify that the Field LED lights.
  6. If any of these jumps fail, replace the relay board and/or power supply.
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