Running Belt Troubleshooting - Precor Precision 400 Series Service Manual

Running Belt Troubleshooting

This procedure is to be used to determine the condition of the running belt and deck.
A clamp-on ammeter will be used to measure the treadmill's
load. The AC input current is a direct indication of the loading effects placed on the drive
motor system; heavier loading requires more input current. Treadmill loading consists of
several factors: the exerciser's weight, treadmill speed, incline level, and condition of the
running belt and deck.
Test conditions:
The AC input current measurement should be performed at 8 mph (13 kph) and 0% incline
for 10 sec minimum workout.
Creating personal input current benchmarks
The Precor typical belt condition input current ratings are based on a loading weight of 220
lbs (100 kgs). A lighter weight exerciser produces less loading effects resulting in lower
input current values for the same belt/deck condition. Therefore, it is recommended that you
should create a personal benchmark or reference input current value for three belt/deck con-
ditions: a new deck/belt condition, a used good belt/deck condition, and a worn replacement
belt/deck condition. These benchmarks will help you to quickly determine the correct con-
dition of the belt and deck.
New belt/deck condition benchmark: Make the input current measurement on a
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machine with a new belt and deck.
Used good belt/deck condition benchmark: Repeat the input current measurement on
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a machine with a known used good condition belt and deck (for a 220 lb (100 kg) load,
the typical input current should be within the 8-12 amp range).
Worn replacement belt/deck condition benchmark: Repeat the input current meas-
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urement on a machine with a known worn replacement condition belt and deck (for a
220 lb (100 kg) load, the typical input current should be 19-20 amps or greater).
Analog Clamp-on Ammeter and Digital Clamp Meters
Because the AC input current will spike (pulse) during foot plants, we suggest the use of an
analog clamp-on ammeter to obtain more accurate measurements. An analog ammeter
makes it very easy to see the AC current spikes and measure the true AC average input cur-
rent. Less expensive Digital Clamp meters may not make accurate AC average current
measurements due to the current spikes. If using a digital clamp meter, make sure that the
meter provides True RMS AC current measurement capability (recommend the Fluke 289
True RMS multimeter or equivalent). You can use the meter AC peak hold feature (if avail-
able) to obtain the largest current spike within the measurement span (some AC current
spikes may exceed the 20 amp max spec. limit).
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Alternating Current: electric current which periodically reverses direction between positive
and negative polarity.
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
7 Troubleshooting
System Troubleshooting Procedures
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AC input current draw under
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