MCB LED Indication
Note:
over 10 Amps when
lit
Note:
a control command
from the PCB to the
MCB
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 JHT.
Light- When lit, indicates the current
to the motor has reached the peak
current trip point of 10 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.
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.
MOTOR
I-limit
PWM
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