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LED (light emitting diode) configurations: RELAY BOARD
The RELAY 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:
AC PWR (green) - The AC PWR (Alternating Current Power) illuminates when AC line voltage is delivered to the treadmill. It then passes through the
VDC (green) – The VDC LED will light when it receives DC voltage from the DC power supply. 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.
UPSW (green) – This LED will illuminate when the low voltage dc is delivered from the upper display board to the elevation UP relay. This low voltage dc is what energizes the coil of the relay.
DNSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display board to the elevation DOWN relay. This low voltage dc is what energizes the coil of the relay.
BELTSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display board to the belt (motor start) relay. This low voltage dc is what energizes the coil of the relay.
SPD (yellow) – The SPD LED flashes on and off (relative to speed) when the speed sensor is operating properly.
PWM (yellow) – This LED will light when the upper board is sending a speed signal to the PWM. Both the PWM LED and BELTSW LED must be lit for belt movement.