Precor AMT12 base, Руководство по обслуживанию

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The Lift system consists of a DC voltage driven lift motor, and an internal 1 K

(Ohms) potentiometer for
lift position monitoring. Because the incline motor is a DC motor, direction is controlled by the polarity applied
to the incline motor. When a positive voltage is applied to the motor, the motor will move upward. When a
negative voltage is applied to the motor, the motor will move downward. As the motor moves, the 1 K

(
Ohms) potentiometer is rotated via an internal gear drive system. The potentiometer’s changing resistance
is fed to the incline control system and converted to an A/D (analog to digital) number that is used in the to
indicate ramp position.
The operating system has a battery monitoring system. If the battery voltage falls below 11 VDC when stride
height movement is initiated or the battery voltage falls below 10 VDC after the ramp movement has been
initiated, ramp movement will be stopped and the message
ERROR 46 will be displayed. Stride Height
motion will not be enabled until such time as the battery voltage exceeds the above limits. The battery
voltage must be raised to correct this condition either by battery charging or battery replacement. This is
strictly a battery problem and not a incline system or incline motor problem.
It is important when you start to troubleshoot the lift system to determine if the problem is due to an inability
to move the lift, or an inability to monitor the lift position.
This will determine whether you need to troubleshoot the DC voltages going to the motor windings, or if you
need to troubleshoot the DC voltages and/or ohm readings from the potentiometer. The error log will help
determine which is causing the issue.
Press and hold the reset key for at least 6 seconds, if there are errors present this action will display the
error log.
If there is an error code for a lift system error (Error 40 through 45) logged in the error log, go to the
appropriate error code troubleshooting page and follow the steps for that error.
Note: All resistance measurements must be performed with power removed from the AMT.
Performing resistance measurements with voltage applied may damage your ohmmeter.

Operation of lift motor for testing:
Most Precor AMTs require the unit to be pedaled for power to be present in order to operate the lift.
For this reason the use of the external power option (if available) is recommended so that p o wer
can be pro vid ed with o ut pe da ling. It is also ad visa ble th at the servicer use the Machine
Tests
within the “Hardware Validation” mode (accessible through Pause-5-1-7-6-5-7-6-1) to check lift
operation.
Error 40 - No Lift Motion Detected
Description