Precor 9.31 Manual page 31

Procedure 5.6 - Running Belt & Deck Troubleshooting
This procedure is to be used to determine the condition of the running belt and running deck
combination. A clamp-on ammeter will be used to measure the treadmill's A.C. input current
under load. The A.C input current is a direct indication of the load being placed on the treadmill.
Treadmill loading consists of several factors, the user's weight, treadmill speed, treadmill incline
setting and the condition of the running belt and running deck condition. By making all of the
other factors consistent we will be able to determine the relative condition of the running belt and
deck combination. The A.C input current measurements will be performed at 3 m.p.h. (4.8 k.p.h.)
and 0% incline. Because the loading varies with the user's weight, you should perform the A.C
input current measurement test on a new running belt and deck combination. That will provide
you with a benchmark reading to account for your individual weight.
Because the A.C. input current reading will pulse between a high value (during foot plant) and a
low reading (between foot plants) we suggest the use of an analog clamp-on ammeter. An analog
ammeter makes it very easy to see the A.C. current pulses. The refresh rate on digital ammeters
may make it difficult to see the current peaks.
1. Remove the treadmill's motor cover and place the A.C clamp-on ammeter on the brown wire
from the A.C. input module (or A.C. power cord) to the circuit breaker (on/off switch). See
the illustration below.
2. Set the treadmill's speed at 3 m.p.h. (4.8 k.p.h.) and the incline at 0%. Walk on the treadmill
and observe the peak A.C. current reading. Typical peak A.C. current readings on a new
running belt and deck are between 3 and 6 amperes.
3. If the peak current reading approach 20 amperes, the running belt should be replaced. The
running deck should be flipped or replaced if the running deck has been previously flipped.
See Procedure X for running belt and running deck replacement.
9.31, 9.33, 9.35 Treadmill
Circuit Breaker
A.C. Input Module
Clamp-on Ammeter
Page 31