Product manual

Option “+” Override Fan – Increase RPM

This command increases the fan PWM by 10%, increasing the fan speed. This overrides the normal fan

operation and the fan control algorithm will not execute until command “N” is run.

Option “8” Override Fan – Minimum RPM

This command sets the fan speed to the minimum RPM. This overrides the normal fan operation and the

fan control algorithm will not execute until command “N” is run.

Option “9” Override Fan – Maximum RPM

This command sets the fan speed to the maximum RPM. This overrides the normal fan operation and the

fan control algorithm will not execute until command “N” is run.

Option “A” Change Fan Algorithm Values

This command pulls up a submenu that allows the user to update the Fan Control Algorithm, maximum

desired Heat Sink Temperature, and fixed RPM value. This allows the user to customize the Fan Control

Algorithm to their situation.

0 (Minimize Fan): This fan control algorithm attempts to minimize the fan speed while keeping the

temperatures below the maximum desired Heat Sink Temperature. If either the Heat Sink or Carrier

temperature exceeds the maximum desired temperature, the fan speed is increased until the temperatures

are within tolerance. Once the temperatures fall below the maximum desired temperature, the fan speed is

slowly decreased. The fan speed is increased faster and more often when the temperatures exceed the

desired maximum then it is decreased. This Combined with some hysteresis built into the algorithm, this

should prevent the fan speed from rapidly oscillating.

1 (Use Heat Sink): This fan control algorithm sets the fan speed based solely on the current Heat Sink

Temperature and maximum desired Heat Sink Temperature. Below a fixed low temp value (15 deg C) the

fan is run at its minimum RPM. Between the low temp value and the maximum desired temperature the fan

speed is set linearly between the minimum and maximum RPM. Above the maximum desired temperature

the fan is run at maximum RPM. There is some hysteresis built in to the algorithm so the fan speed does

not rapidly oscillate. In this algorithm the desired fixed RPM value is not used.