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Error Code PLS flashes in PULSE/CALORIES display

Indicates the heart rate monitor is not reading a signal properly.

? What Causes This

Faulty heart rate monitor or loose sensor setup.

How to Fix It

Ensure heart rate monitor is correctly positioned and wet with saline solution. Adjust electrodes if necessary.

Source: page 6 of the official manual

From the manual

Manual page 6 — Image error PLS flashes in PULSE/CALORIES display

This error code appears in:

Image 10 0 Treadmill Imtl39620