Alternator Belt Slipping; No Heart Rate Or Erratic Heart Rate - Life Fitness 8500 Service Manual

Life Fitness Model 8500, 9100, and 9500HR Cross-Trainers
Malfunction

Alternator belt slipping.

No heart rate or erratic heart rate.

6
Probable Cause
Belt is loose.
Pinched cable in Monocolumn cover.
Defective chest strap or improperly
positioned.
No heart rate reading.
Faulty cable connection.
Malfunctioning user arm/Lifepulse
(CT9500HR) Grip Assembly (include
worn or damaged heart rate lead).
Life Pulse user arm defective.
Loose or malfunctioning heart rate
lead connection at Display Console.
Heart-rate (DSP) Board (CT9500HR)
is faulty or not communicating.
Malfunctioning Display Console.
Cross talk from telemetry and another
transmitter or possible interference
from other electronic devices.
Bad connection.
Corrective Action
Retension from 65-70 lb.
Remove monocolumn covers and
inspect cables. Replace damaged
cable.
Replace chest strap or reposition it.
Reset transmitter. Refer to
Diagnostics state 3 to execute the
heart rate test.
Execute Diagnostic Mode to verify
performance of heart rate function.
Verify heart-rate cable is properly
connected. Using an ohmmeter,
verify continuity at the main console
cable.
Replace user arm/Lifepulse
(CT9500HR) Assembly.
Verify user arm is functioning. Wipe
sensors dry. Using an ohmmeter,
verify continuity between Lifepulse
sensor and cable connection.
Replace if defective.
Secure connection. Replace
malfunctioning user arm/Lifepulse
(CT9500HR) Grip Assembly.
Verify that the heart-rate (DSP)
board (CT9500HR) is communi-
cating. If defective, replace.
Test with known good Display
Console. Replace malfunctioning
Display Console.
Position Cross-Trainer at least 3 ft
(1 m) from unit with telemetry or from
other electronic devices.
Check for corrosion on connectors.
Disconnect and reconnect telemetry
receiver.