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LED (light emitting diode) configurations: SCR lower board
The SCR lower board is designed with diagnostic LED lights. The LED’s are color coded according to their specific function. Green indicates a properly operating treadmill; the green lights should always be ON when power is supplied to the treadmill. Yellow indicates a treadmill function. Red indicates a treadmill malfunction. Here is a list of each LED and what it signifies:
MOTOR (yellow) – The MOTOR LED illuminates when dc (direct current) voltage is sent to the drive motor. The LED gets brighter when the dc output is increased.
RLC (yellow) – The RLC (R = Reactance / L = Inductance / C = Capacitance) LED illuminates when the filtering system is properly working. The filtering system includes the capacitor and filter choke. If there is a short in either component then the RLC light will not come on.
DN & UP (yellow) – The DN and UP LED lights tell us if the elevation DN and UP relays are functioning properly. When the LED lights, it tells us that the relay has energized and is sending high voltage (110vac or 220vac) to the elevation motor.
AC PWR (green) – The AC PWR (Alternating Current Power) illuminates when AC line voltage is delivered to the treadmill. It then passes through the
+12V (green) – When the proper AC voltage is delivered to the treadmill, passes through the