Precor EFX546i Owner's Manual page 52

Safety Code
The fitness facility you are using has the option to enable a safety
code. The code involves entering four number keys in sequence. If
the correct keys are not pressed within two minutes, further access
is denied and the running belt will not move. For more information,
refer to Entering the Safety Code.
User's Reference Manual: Important Safety Instructions
Obtaining Service
The fitness facility manager can help you with most questions
regarding the equipment. For additional information about product
operation or exercise routines, refer to the Precor web site at
www.precor.com.
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