Error 12 - Watchdog (Lower Pca); Description; Possible Causes; Possible Remedies - Precor TRM10/GEN06 Service Manual

Error 12 - Watchdog (Lower PCA)

Description

The error 12 watchdog monitors the lower PCA 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 PCA overloads the low voltage power supply and
causes it to drop below the preset limit.
2 A fault is in the interconnect cable (lower PCA to upper PCA) causing
the lower PCA low voltage power supply be too low.
3 A failure in the upper PCA that overloads the lower PCA 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 PCA should be replaced. It is possible to see
this message displayed intermittently due to external causes. If the
unit's A.C. input significantly dips during the power up test sequence
the test could fail resulting in this message being displayed.
Treadmills operating on non-dedicated A.C. 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 and lower PCA's.
3 Substitute a known good upper PCA for the existing PCA to determine if
the upper PCA is the cause.
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