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110v MCB LED Layout
The Following LEDs will help diagnose if the MCB has failed or causing intermittent problems.
** CAUTION ** AC LED - Indicates that AC power has been applied to the MCB. It does
Several of the follow- not give indication of voltage level, if this LED is not lit and the tread-
ing troubleshooting mill does not power up, verify the following:
require dealing with 1. The treadmill is plugged into a wall outlet.
live voltage. Have the 2. The ON/OFF switch is turned to the “ON” position.
treadmill turned off 3. Verify with a VOLT METER that 110VAC is present at the
and unplugged when outlet. Units with step-down transformers need 220VAC.
checking wire 4. Verify 110v (+/- 10%) AC voltage at AC1 & AC2 wires.
connections. After the above have been verified and the AC LED is still “OFF”, the
MCB should be replaced.
NOTE: The display +18v LED - Indicates the presence of an acceptable level of voltage to
console may still operate the MCB. If this LED is off or dim, the AC voltage level is
power up with the AC not acceptable to properly power the MCB. Verify the following:
LED off. 1. Verify with a VOLT METER that 110VAC is present on
on pins AC1 & AC2.
After the above step has been verified and the + 18V LED is still “OFF”,
and the display does not power up, replace the MCB.
+11v LED - Indicates there is +11 volts supplied to the display board. If this
LED is not lit verify the following:
1. The display cable is damaged or pinched, disconnect the
display cable and verify if the LED lights up. If LED lights up
replace the cable.
After the above has been verified and the +11 LED is still “OFF”, the
MCB should be replaced.
4.1