Quinton TM55, Service Manual

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3-4 Troubleshooting Cardiac Stress Treadmills Service Manual
*The type and the rate of bearing noise can help determine which bearing
is at fault. The number of knocks per minute varies with treadmill speed
because the roller speeds change as the belt speed changes.
**Use a mechanical stethoscope or a piece of hose about two feet long, to
isolate bearing problems. Hold one end of the hose near the suspected
bearing and the other end near your ear. Compare several bearings to
determine which is the faulty one.
Error Flow Charts
Use the flow charts on the following pages for step-by-step
troubleshooting.
Squealing (similar to loose
automobile fan belt).
Drive belt loose. Adjust belt tension.
Replace belt if necessary.
Popping during grade
change.
Faulty elevation chain
alignment.
Adjust alignment of
sprockets.
Noise Possible Cause Action
Error Code Flow Chart Page
EPHI and EPLO “Bus Voltage Flow Chart” on page 3-5
E201 “Grade Error Flow Chart” on page 3-6
E203 (Drive Motor) “Drive Motor Flow Chart” on page 3-7
E204 “Communications Link Flow Chart” on page 3-8
Grade Problems “Grade Problems Flow Chart” on page 3-9