Mcb

MCB LED Indication

Note:

over 26 Amps when lit

Note:

a control command from the PCB to the

MTR Light- When lit, indicates the High Power Direct Current supply for the motor

(B+) is online. This light will remain lit for a period of time after power has been removed from the MCB. While the MTR light remains lit, anyone handling the MCB should use caution since there is still a hazardous potential present. When the MTR light is off, B+ is not present and the motor controller will not operate. If the MTR and I-limit lights are off, verify motor connections and proper motor operation. If the MTR light is off and the I-limit light is on, the MCB shut off due to an extended current limit condition. In this case, resetting the PCB or cycling power will eliminate the problem. However, the treadmill should be thoroughly examined for wear or damaged components which might have lead to the extended current limit condition. If this problem persists, return the board to JMI.

4- limit Light- When lit, indicates the current to the motor has reached the peak

current trip point of 26 Amps. The MCB will limit the current when the current limit point has been reached. If the current limit continues for roughly 5 seconds, the MCB shuts down and the I-Limit light will remain on. To reset the I-Limit, turn the treadmill off at the power switch wait about 30 seconds then turn the power back on. PWM Light- Indicates the control PWM

from the PCB is present. It will blink at the control frequency used by the PCB when the PCB commands speed. If the control signal should exceed 95 percent duty cycle, the PWM light shuts off and sets the MCB to a safe shutdown mode. In the event this should occur, the power to the treadmill should be removed, the cabling checked for shorts and the PCB replaced. If this problem persists, replace the MCB.

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