Thermo Fan

Thermo Fan

Thermo Fan

The Thermo Fan function is used to control either a switched or a duty cycle driven engine cooling fan. Up to 4 thermo fans can be individually configured. 
Note: Default temperatures are provided in Degrees Celsius.



General

Frequency - Only active when the Mode has been set to Digital - Duty Cycle. The frequency that will be used for the duty signal. This is dependent on the controller and typically 200 to 500Hz. 

Trigger Source - Which temperature sensor triggers this thermofan. A thermofan source channel will be created by this setting and should be used as the axis in thermofan duty cycle table.

Enable Above - Only active when the Mode has been set to Digital - Switched or CAN - Switched. When the Trigger Source Temperature exceeds this amount the output will be ON. This value must always be higher than the Disable Below value.

Disable Below - Only active when the Mode has been set to Digital - Switched or CAN - Switched. When the Trigger Source Temperature falls below this amount the output will be OFF. This value must always be lower than the Enable Above value.

Idle Up Delay - Only active when the Mode has been set to Digital - Switched or CAN - Switched and the Idle Control Function is enabled. The Idle RPM Offset and Idle Base Offset will be active for this amount of time before the Thermo Fan Output is enabled. This is to allow for idle control to reach the new target before the Thermo Fan loads the engine. (Default = 0.00)

Idle RPM Offset - Only active when the Mode has been set to Digital - Switched or CAN - Switched and the Idle Control Function is enabled. The Target Idle will be increased by this amount when the Thermo Fan Output is On. 

Idle Base Offset - Only active when the Mode has been set to Digital - Switched or CAN - Switched and the Idle Control Function is enabled. The Idle Base Duty will be increased by this amount when the Thermo Fan Output is On.

Additional Enable Conditions

Override Switch Enable - Allows for the use of an override switch to force the thermofans on or off regardless of the temperature of the Trigger Source.
Override Duty Cycle - When the Override Switch is active, this is the duty cycle that the Thermo Fan Output will be pulsed at. Only available for Digital - Duty Cycle. 
When the Mode has been set to Digital - Switched or CAN - Switched, the output will be ON when the Air Conditioner Output is active.
Enable with A/C - Only active when Air Conditioner function is Enabled. This allows the Thermo Fan to be used to assist condenser cooling when the Air Conditioner Output is active. 
When the Mode has been set to Digital - Switched or CAN - Switched, the output will be ON when the Air Conditioner Output is active.
Minimum Duty - Only active when the Mode has been set to Digital- Duty Cycle. The minimum duty that will be output when the Air Conditioner Output is active
Vehicle Speed Control - Only available when a Vehicle Speed Sensor has been enabled. When enabled, allows the Thermo Fan to be disabled at high vehicle speed when airflow through the radiator is higher than the fan can supply. 
Enable Below - Active only when Vehicle Speed Control has been enabled. When the vehicle speed drops below this amount, the Thermo Fan Output will be ON. 
Disable Above - Active only when Vehicle Speed Control has been enabled. When the vehicle speed exceeds this amount, the Thermo Fan Output will be OFF. 
A/C Pressure Control - Only available when an A/C Pressure Sensor has been enabled. When enabled, allows the Thermo Fan to be disabled at low A/C pressure. 
Enable Above - Active only when A/C Pressure Control has been enabled. When the A/C Pressure exceeds this amount, the Thermo Fan Output will be ON.
Disable Below - Active only when A/C Pressure Control has been enabled. When the A/C Pressure drops below this amoun,t the Thermo Fan Output will be OFF.

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