| 摘要 |
A computer system includes a cooling module that cools an embedded computer chassis. The cooling module includes a fan and a fan controller that controls the fan speed based on a first signal that represents a desired speed of the fan. A bus master module generates the first signal, generates a second signal that bypasses the fan controller and selectively switches the fan to a full-speed, receives a third signal that indicates an actual speed of the fan, communicates the second signal to switch the fan to full-speed, monitors the third signal to determine if the fan speed changed due to the second signal, and indicates a latent fault if the change in the fan speed is not detected.
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