Precor TRM10/GEN06 Service Manual page 64

1 The vertical market treadmill uses an IFT lower control module that
looks the same, but is programmed differently. One of the things
that is programmed differently is the lowest A/D value for the lift
range (approximately 3000 in the vertical market unit). Having the
wrong lower control module installed could easily cause an out of
range (error 42) condition.
2 Intermittent connections can be difficult to locate. If the error 42
condition is intermittent a connection is almost certainly the
problem. This is especially true if the error 42 occurs while the
lift is within its normal physical range.

Carefully inspect the lift potentiometer connector, repair the
poor connection, if possible. If the intermittent connection
cannot be found or repaired, replace the lift motor.

A lift calibration number of 0 or 65535 indicates an open or
shorted potentiometer connection. This problem could be anywhere
between the lift motor and the upper PCA. It can typically be
found and traced with an ohmmeter.
Figure 15: Lower Control Module Connector Numbering

Set the treadmill's on/off switch in the off position. Remove the
lift motor's connector from the INCLINE connector on the power
control (IFT) module. Visually inspect the lift motor's wiring
and connector for any broken or improperly crimped connections.
With an ohmmeter, read between terminals 3 (red) & 4 (black), 4
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