Entering EFX Diagnostic Mode

For Oldest Units, Before 9/97:
Turn on the EFX 544 with the circuit breaker and simultaneously press RAMP UP, RESISTANCE DOWN and RESISTANCE UP keys. LED diagnostics will automatically begin.

For Newer Units, After 9/97:
Turn on the EFX 544 with the circuit breaker. Press the following numbers in sequence: 517617. If that doesn’t work, press, in sequence, STOP 51765761. LED diagnostics will automatically begin.

In Calibration Mode, the following tests are available:

• LED diagnostics
• Checking Lift Calibration Number.
• Determining Software Version.
• Heart Rate Diagnostic.
• Performing Keypad test.

To Exit Diagnostic Mode:
Press ENTER 3 times, or simultaneously press RAMP DOWN and RESISTANCE UP.

Complete list of new Standardized Error Codes for all Precor Models available at www.gympart.com.