Patent ID: 7373278

Claim:
A method of latent fault checking a cooling module of an embedded computer chassis, comprising: prior to detection of an active fault in the cooling module, performing a fan controller latent fault checking algorithm and a full-speed latent fault checking algorithm, the fan controller latent fault checking algorithm comprising: communicating a signal to modify a fan speed in the cooling module via a fan controller module in the cooling module; determining if a change in the fan speed is detected; the full-speed latent fault checking algorithm comprising: communicating a signal to modify the fan speed via a full speed fan control circuit, bypassing the fan controller module; determining if the change in the fan speed is detected; and if the change in the fan speed is not detected in at least one of the fan controller latent fault checking algorithm and the full-speed latent fault checking algorithm, indicating a latent fault in the cooling module of the embedded computer chassis.