3-2 Troubleshooting Cardiac Stress Treadmills Service Manual
off the treadmill circuit breaker, then unplug the treadmill
from the power source before removing the hood. Use
extreme caution at all times when the hood is removed.
Secure loose clothing, jewelry, and long hair before
working near treadmill parts.
Never place your fingers near rotating parts.
Do not start the walking belt when someone is on the
treadmill.
Electrical Problems
Treadmill Does Not Start
Possible Cause Action
Treadmill not plugged in. Plug power cord into appropriate outlet.
Circuit breaker on treadmill
set to Off.
Set treadmill circuit breaker to On.
Building circuit breaker
tripped.
Contact building maintenance to reset circuit breaker. If
circuit breaker trips again:
1. Check outlet voltage. If necessary, verify that the
power at the outlet and at the breaker is the correct
rating for the treadmill.
2. Verify that the power cord is not damaged.
3. Replace the configuration plate (faulty in-rush limiter).
Power to the stress monitor
not on.
Turn on power to stress monitor.
Power cord damaged. Remove cord from outlet and replace.
Fuse in treadmill blown. If any of the transformer primary fuses, F1 or F2, are
blown:
1. Check the primary transformer windings for continuity.
Should be 2 ohms or less.
2. Replace fuses and if the fuses blow again, isolate
mechanical assembly and ensure that no parts are
jammed (for example, rack gear in grade change
assembly). If F1 or F2 are blown, check the 12 volt
power supply.
Control cable between
variable speed drive (drive
board on the AC Drive
Module) and stress monitor
is faulty.
Check for bent or broken pins. Replace control cable.
Drive board on the AC
Drive Module failure.
Check power supply at test points. Replace AC Drive
Module, if necessary.
Configuration plate
connection faulty.
Replace configuration plate.
Optional emergency stop
button activated.
Push in button and twist counter-clockwise to unlock.
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