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Description
The error 12 watchdog monitors the lower control module low voltage power. If the low voltage power drops
below a preset level, the error 12 will be displayed.
Possible Causes
1
A failure in the lower control module overloads the low voltage power supply and causes it to drop
below the preset limit.
2
A fault is in the interconnect cable (lower control module to upper PCA) causing the lower control
module low voltage power supply be too low.
3 A failure in the upper PCA that overloads the lower control module low voltage power supply causing it
to be too low.
Possible Remedies
1
If the error message is consistently displayed when the unit is powered up, the lower control module
should be replaced. It is possible to see this message displayed intermittently due to external causes.
If the unit's AC input significantly dips during the power up test sequence the test could fail resulting in
this message being displayed. Treadmills operating on non-dedicated AC circuits may see this
message displayed on an intermittent basis.
2
Substitute a known good interconnect cable in place of the existing cable to determine if the
interconnect cable is the cause. For the purpose of the test, the substitute cable should be connected
directly between the upper PCA and lower control module.
3 Substitute a known good upper PCA for the existing PCA to determine if the upper PCA is the cause.
Error 80, 81, 82, & 83
– P30 Machine Controls Not
Working
Summary of Contents for AMT12 base
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