Precor TRM 811.v2, Service Manual

Page: 37 / 114

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If the Treadmill breaker (power switch) is tripped:
1. Verify the wall outlets do not share neutral wiring and that each wall outlet is on an individual
branch circuit. An individual branch circuit will have its own load line, neutral line and ground
line. Have an electrician verify if neutrals are being shared or not.

If YES, advise customer to have their facility wiring upgraded per Precor specifications,
and then continue with step 2.

If NO, continue with the following steps.
2. Verify that their Long Branch run is done with inadequate gauge wire.

If YES, advise customer to have their facility wiring upgraded per Precor specifications.

If NO, continue with the following steps.
3. Verify line voltage. Low line voltage for the U.S. is anything below 108VAC, measured while
the treadmill circuit breaker is turned "ON", but the running belt is idle. For international, low
line voltage is anything below 200VAC while the treadmill circuit breaker is turned "ON" and
the running belt is idle. Measure the line voltage with the treadmill circuit breaker is turned
"ON", but the running belt is idle. Make note of the voltage. Using the Belt Speed Test in the
Diagnostics menu, note the voltage while running on the treadmill at 7.0 MPH or higher.
4. If any measurement is below 108VAC (US) or 200VAC (International), advise the customer
to have their facility wiring inspected by an electrician.
5. If the measurements are at or above 108VAC (US) or 200VAC (International), continue with
following steps.
6. Does the treadmill trip its breaker immediately on power up?

If YES, it is likely that there is a shorted component (line filter, Motor Controller) or
faulty/shorted wiring.

If NO, continue with the following steps.
7. Does the treadmill power up, but trips the breaker after the motor is started?

If YES, it is likely that there is a bad roller or bad drive motor.

If NO, continue with the following steps.
8. Does the drive motor start up fine, but trips the breaker after a user walks/runs on the
running belt?

If YES, Overloading is the most frequent cause of treadmill shutting down. Overloading is
most often caused by excess deck/belt friction, but can be made worse by line voltage
conditions. The overloading condition happens more often with heavier runners, but
never walkers. In high user clubs (10 hours or more of use per day), the decks/belts will
wear out much faster than at other locations, sometimes in months rather than years. It is
often accompanied by error codes 27, 28, 35 or 36. For more information refer to
“
Running Belt & Deck Troubleshooting
”
.