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TREADMILL!MCB!CODE!SHEET!
Model!#!F9621***!!
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Revision!1.1!+!Dec.9.13!
Symbol
Description
Actions
Relay Position Abnormal
Usually accompanied by an Error 54
on the Display
Change Motor Control Board
Normal Operation – Relay is closed
Don’t do anything!
“Eight is Great” or “B is Beautiful”
Default Position when Relay
on MCB is open and waiting
for instruction.
Some errors cause the Relay to open, which then
causes ‘C’ to appear on the MCB. If the unit is not
operating and there is a ‘C’ on the MCB then there
should be an error on the display if it has power.
Speed Sensor Cable Error
(Error 53 appears on the Display)
Check that the speed sensor cable is
connected to the MCB on the connector
labeled “SPEED”. If not, attach it (Error C
appears on the LED) and reset the treadmill.
Check the speed sensor cable is not pinched.
* If the Speed Sensor light flashes when you
turn the motor but Error 53 still immediately
appears when the treadmill is turned on it could
be the R64 resistor on the MCB.
ROM/PC Self Check error
EPROM is correctly installed but it self-tested the
code and saw an error.
Most likely solution is a new EPROM.
Elevation Motor Error
Possibly Exceeding Range
Note: After changing an MCB or an
Elevation Motor an Elevation
Calibration must be completed.
Check the wire from the Elevation Motor is correctly
plugged in at the connector labeled “INCLINE”.
If it is not plugged in, the walking belt will run as
normal but when the user tries to increase or
decrease incline the value will change on the
screen but the elevation will not move.
If the wire is plugged in then Complete an Elevation
Calibration to see if the problem is solved.
If that doesn’t solve the problem, check the
resistance in OHMS (between the black and white
wires (not red) at the elevation connection) at the
maximum elevation (should be 450 Ohms) and
minimum elevation (850 Ohms)
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