Precor Error Code 40 No Lift Motion Detected

Mar 12, 2022

Applies to All Machines with a Lift Motor

Issue symptoms

Error indicates that the incline (lift) system on either a treadmill, EFX, or AMT12 has been instructed to start moving and no lift motion has been detected by the lift position monitoring system. Most likely causes are a blown lift fuse on the lower PCA or the lift motor is physically jammed and unable to move. On the EFX and the AMT12, a fully dead battery can also cause this error. While unlikely but possible, a faulty lift motor capacitor or winding will prevent movement.

Troubleshooting steps

1. Remove power from the unit and remove the lift fuse from the lower PCA. Measure the fuse with an ohmmeter. If the reading is higher than very near zero, replace the fuse.
2. TRM800-14/18 treadmills: Verify the current motor controller (IFT drive) software part number version meets the following minimum software version requirement:

Treadmill	Minimum SW Version
TRM800-14/18 120V	302105-103 or later
TRM800-14/18 230V	302106-103 or later

3. Disconnect the lift motor from the lift platform (treadmill, AMT12) or ramp (EFX). If the lift tube or lift nut is jammed against the motor housing, rotate the lift nut or lift tube away from the motor housing. Calibrate and install the lift motor per the appropriate service manual procedure.
4. Treadmills built before March 2014: With a voltmeter reading AC volts and a one-meter lead placed on the brown lead of the line filter:
   • The meter should read 120 VAC on each of the red, white, and black lift motor wires.
   • Enter Diagnostics > Machine Test > Incline Test to operate the lift.
   • With a meter lead on the red wire, move the lift upward; the meter should read close to 0 VAC.
   • Staying on the red wire, move the lift down; the meter should read approximately 200 VAC (120V Units) or 300V (240V units).
   • If this value is significantly low, the capacitor is failing, requiring lift motor replacement.
   • Move the meter lead to the black motor wire and move the lift down; the meter should read close to 0 VAC.
   • Staying on the black wire, move the lift upward; the meter should read approximately 200 VAC (120V Units) or 300V (240V units).
     • If this value is significantly low, the capacitor is failing, requiring lift motor replacement.
5. Treadmills build after March 2014: With a voltmeter reading AC volts and a one-meter lead placed on the blue lead of the line filter, follow Steps a – f above.
6. EFX/AMT Only: Set the meter to DC volts and check the voltage of the battery while the lift is in use (under load).
   • With the meter leads on the red and black lift wires, respectively, the meter should read +12 volts when moving up and -12 volts when moving down.
   • If the voltage drops below 11 volts, check the battery according to the Troubleshooting the Incline System in the Service Manual.
7. If a lift motor winding is bad, the lift will not move in one or both directions, depending on the exact fault in the motor. The lift motor winding may be checked with an ohmmeter. AC lift motors will have a split winding (3 wires). DC lift motors will have a single winding (2 wires). On AC motors, both windings must be checked. Depending on the lift motor being tested, normal winding readings could vary anywhere between 1 and 60 ohms. Refer to the appropriate service manual for the motor being tested.
8. Defective A/D potentiometer:
   • Defective lift motor A/D potentiometer connections can cause a mix of Error 40s (lift not moving), Error 42s (lift out of range), and/or Error 45s (lift moving in wrong direction) event. An Error 45 is almost always an indication that the potentiometer has a bad internal motor connection. It is possible that the error log (or event log) will fill with Error 40s and 45s when it was only a single event. Even after the cause of an Error 40 and 45 event has stopped, these errors will continue to be logged until the treadmill power is cycled OFF/ON. Error 42 will clear if the lift goes back within range limits. If the lift remains in an out of range condition, the error log will continue to fill with Error 42s with use. Replace the lift motor if these conditions are confirmed.
   • The lift motor calibration will remain set to factory specification unless the lift motor has been replaced. If the unit is exhibiting an out-of-calibration condition (e.g., the treadmill incline level is set to 0 but the running deck is not level) and the lift motor has not been replaced, it is most likely caused by defective A/D potentiometer connections. If this condition is confirmed, replace the lift motor.