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:
- Disconnect power from the machine.
- Disconnect the main cable from the relay board J1 terminal.
- The main cable should remain disconnected for the duration of the relay board tests.
- 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.)
- Verify that the Relay LED is lit.
- Remove jumper wire.
- Verify that the Relay LED is lit.
- 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.)
- Verify that the Field LED is lit.
- Remove jumper wire.
- Verify that the Field LED is lit.
- With the Power ON, place jumper wire across the +/WHT, and with the other end touch the ALT/C.
- Verify that the Field LED lights.
- If any of these jumps fail, replace the relay board and/or power supply.
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