Error 25 - Motor Pulse Count over Acceptable Limit
This error monitors the treadmills power bit reading. Power bits indicate the relative time that the
motor controller drive circuit is turned on. Therefore power bits is an indication of the amount of
power the load is demanding from the motor controller. The treadmill software sets a maximum
allowable power bit limit. Error 25 indicates that the maximum power bit limit is being exceeded.
1. The running belt and/or running bed is badly worn.
2. On treadmills utilizing an SCR motor controller, a leaky or shorted drive motor filter capacitor
could raise the current demand sufficiently to cause the error 25.
3. On treadmills utilizing an SCR motor controller, a leaky or shorted drive motor inductor could
raise the current demand sufficiently to cause the error 25.
4. A shorted or de-magnetized drive motor is causing the high power demand.
1. A clamp-on A.C. ammeter must be used to determine the amount of A.C input current being
drawn by the treadmill under no load and loaded conditions. The current readings can be
used to determine the condition of the running belt and/or running bed. These same readings
should be taken on a similar unit with a known good running belt and running bed. Those
readings can then be used as a benchmark for future use. Replace the running belt and/or
running bed as required. Remember, many running beds are double sided and the bed can
be flipped over rather than being replaced.
2. A clamp-on ammeter should be used to measure the A.C. input current at no load. The filter
capacitor should then be electrically isolated from the drive motor circuit. The drive motor
leads must be kept intact so that the drive motor will operate with the filter capacitor removed
from the circuit. The no load A.C. input current should be measured again, if the A.C. input
current is significantly lower, replace the filter capacitor.
3. Use the same procedure as in step 4 above, except remove and isolate the inductor from the
drive motor circuit instead of the filter capacitor.
4. A known good drive motor must be substituted for the existing drive motor.