Thermofan
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.
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Wiring Tab
Options
Thermo Fan 1,2,3,4
Enables or disables each Thermo Fan. When each Thermo Fan is enabled, a unique Tab Window that contains all of the relevant settings will become available. i.e. Enabling Thermo Fan 1 will activate the Thermo Fan 1 Tab.
Mode
Select which type of Thermo Fan is to be connected to the Elite ECU.
Digital Frequency
The Thermo Fan uses a PWM duty signal to regulate fan speed. This type of Thermo Fan will have a controller box to accept the duty signal and control the current to the fan.
Digital Switched
The Thermo Fan is a simply On/Off style fan.
Connections
Thermo Fan 1,2,3,4 Output
Select an appropriate Output to use for each of the Thermo Fan Outputs. A relay must be used to supply power to the fan. The fan should not be directly wired to the Elite ECU.
Active State
All DPOs switch to ground when they are active. Changing the Active State simply changes whether the output is normally On or it is normally Off. It does not change the output from being a ground to being a 12V+ supply.
Note: When a DPO is being used as the output, it should be wired to a trigger pin of the relay and a switched 12V+ should be used for the other trigger pin of the relay. When using a Stepper output it is possible to select these to be a high side drive. i.e. they can provide 12V+ when activated.
Thermo Fan 1, 2, 3, 4 Tab
Frequency
Only active when the Mode has been set to Digital Frequency. The frequency that will be used for the duty signal. This is dependent on the controller and typically 200 to 500Hz. (Default = 250)
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. When the Trigger Source Temperature exceeds this amount the output will be ON. This value must always be higher than the Disable Below value. (Default = 90)
Disable Below
Only active when the Mode has been set to Digital 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. (Default = 85)
Idle Up Delay
Only active when the Mode has been set to Digital 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 and the Idle Control Function is enabled. The Target Idle will be increased by this amount when the Thermo Fan Output is On. (Default = 10)
Idle Base Offset
Only active when the Mode has been set to Digital 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. (Default = 0.0)
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, the output will be ON when the Air Conditioner Output is active. (Default = Disabled)
Minimum Duty
Only active when the Mode has been set to Digital Frequency. The minimum duty that will be output when the Air Conditioner Output is active. (Default = 0.0)
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. (Default = Disabled)
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. (Default = 90km/h)
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. (Default = 100km/h)
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. (Default = Disabled)
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. (Default = 2100 kPa)
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. (Default = 1800 kPa)
Related Tables
Duty Cycle
The amount of duty cycle for the Thermofan output. Typically lower duty will give a lower fan speed, and as temperature increases the duty should be increased to give a higher fan speed. Up to 2D mapping is available.
Idle RPM Offset
Increases the idle target RPM by this amount when the Thermofan output is on. This is used to assist when battery voltage drops too low when the fan is on.
Idle Up Delay
This is to allow adequate time for the Idle Control to increase the idle rpm before the thermofan activation loads the engine.
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