Description
Some treadmill motor controllers
monitor the temperature of the motor controller output switching
device. Typically, these motor
controllers use a fan to force cool the output devices heat sink.
This error indicates that the heat
sink temperature has exceeded maximum.
Possible
Causes
1. The lower PCA cooling fan is
clogged.
2. The lower PCA cooling fan is
inoperative.
3. The running belt and/or running
bed is badly worn.
4. The lower PCA is defective.
5. A shorted or de-magnetized drive
motor is causing the high power demand
Possible
Remedies
1. Check the cooling fan mounted on
the lower PCA to ensure that the fan is not clogged with
dust. Thoroughly clean the fan and
ensure that it spins freely. Some lower PCA’s do not have
a cooling fan and some lower PCA’s
have the fan mounted on the underside of the the lower
PCA and are not immediately visible.
2. The lower PCA is clean and
unobstructed but the fan does not spin. Ensure that the fan
wiring is securely and correctly
connected to the lower PCA. If the fan is unobstructed and
the fan wiring is good, replace the
lower PCA.
3. 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.
4. Substitute a known good lower PCA to determine if the lower PCA is defective.
5.
Substitute a known good drive motor to determine if the drive motor is
defective.4. Substitute a known good lower PCA to determine if the lower PCA is defective.
