flash enable bit is further described in the description for the cpu b controller 316 fig1 from either state 1424 or 1426 if the flash bit was not enabled the cpu a controller 314 proceeds to state 1428 and checks for system faults if the cpu a controller 314 determines that a fault occurred the cpu a controller 314 displays the fault on the lcd display 512 state 1430 from state 1428 if no fault occurred or from state 1430 the cpu a controller 314 proceeds to the checks the system status flag located in the cpu a controller 39 s memory decision state 1432 if the status flag indicates an error the cpu a controller 314 proceeds to state 1434 and displays error information on the lcd display 512 from either state 1432 or 1434 the cpu controller proceeds to state 1402 to repeat the monitoring process fig1 is a flowchart showing one process by which the cpu a controller 314 monitors the fan speed fig1 is a more detailed description of the function of state 1412 in fig1 a starting in state 1502 the cpu a controller 314 reads the speed of each of the fans 1506 1508 and 1510 the fan speed is processed by a fan tachometer signal mux 508 also shown in fig5 b which updates the cpu a controller 314 the cpu a controller 314 then checks to see if a fan speed is above a specified threshold state 1512 if the fan speed is above the threshold the cpu a controller 314 proceeds to state 1514 otherwise if the fan speed.