Micro Autonomations Fan Controller v3 Manual

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

Fan Controller v3

Micro Autonomations LLC

www.ma-embedded.com

Description

This controller was designed to control C-Class fans from Mercedes. It will work with any standalone

temperature sensor, or it may piggyback on any 5v EFI temperature sensor. Use, described in more

detail later, entails entering programming mode to set the turn on and 75% fan speed temperatures.

The controller will command the fan speed linearly between and above those two temperature set

points.

As a safety feature, if the controller does not detect a temperature sensor, it will turn the fan on; or, if

the active sensor wire gets grounded, it will turn the fan on.

Micro Autonomations LLC – Fan Controller v3

Document Rev 1.0

Table of Contents

Need help?

Do you have a question about the Fan Controller v3 and is the answer not in the manual?

Questions and answers

Summary of Contents for Micro Autonomations Fan Controller v3

Page 1 As a safety feature, if the controller does not detect a temperature sensor, it will turn the fan on; or, if the active sensor wire gets grounded, it will turn the fan on. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 2: Table Of Contents
Figure 7 - Fan plug wiring ..........................11 Figure 8 - Programming Flowchart ......................13 Figure 9 - Controller mounting dimensions ....................18 Revision History Document version Changes Date Rev 1.0 Initial Release April 7, 2014 Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 3: Theory Of Operation
25% fan speed until the engine temperature has dropped approximately 3-5°F below the turn on temperature. Once the engine temperature is below this hysteresis point, the fan will turn off and await the need to turn on again. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 4: Maximum Voltage Specifications
Air Conditioning Input Brown Standalone Temperature Sensor (+) Orange EFI Temperature Sensor Purple Ground Black Speed Output Yellow Not Used Standalone Temperature Sensor Return (GND) White Remote Status LED Gray Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 5: Signal Descriptions
Standalone Temperature Sensor Return (GND). Single Terminal Temperature Sensor – The one terminal must go to this pin. The body of the sensor must have a good connection to ground. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 6 Fan at full If the temperature requires the fan to operate at full speed, the Remote Status LED will turn speed on steady until the fan speed drops below full speed Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 7: Onboard Status Leds
Operating normally, fan off Green Fan on Green->Orange->Red gradient, depending on fan Green speed Green = 25%, Orange = 50%, Red = 90% (full speed) Error Blinking error code Programming Various Various Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 8: Wiring Diagrams - One Terminal Sensor
Wiring Diagrams – One Terminal Sensor Figure 4 - Wiring with a one terminal temperature sensor installed Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 9: Wiring Diagrams - Two Terminal Sensor
Wiring Diagrams – Two Terminal Sensor Figure 5 - Wiring with a two terminal temperature sensor installed Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 10: Wiring Diagrams - Efi Sensor
Wiring Diagrams – EFI Sensor Figure 6 - Wiring using a 0-5v EFI temperature sensor Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 11: Wiring The Fan
Autometer #2258. This is a single terminal 1/8” NPT sensor. The sensor body must have a good connection to ground. You may not be able to use sealant on the threads. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 12: Compatibility
Compatibility Fan Controller v3 is known to work with the following fans/vehicles Fan/Vehicle Notes 2001 to 2007 C-Class Mercedes 600W, 800W SLK32 AMG Fan Speed wire to PWM terminal, Trigger to ‘15’. 100k pull-ups on old control lines to avoid CEL Micro Autonomations LLC –...
Page 13: Programming The Controller
Details about each programming sub-menu can be found on the next page. The Status and Error LEDs will change colors to indicate the current location in the programming flowchart. Figure 8 - Programming Flowchart Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 14 75% temperature is manually set once the engine reaches 200°. This will put the full speed temperature at 206°, and the fan will turn off after the engine temperature drops below ~176°. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 15 Pre-set temperature ranges available for selection: Range # Turn On Temperature 75% Temperature Full Speed Temperature Error LED color 170° 185° 190° Green 190° 205° 210° 200° 215° 220° Orange Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 16: Error Modes
The controller requires at least 0.1v between 75% temperature points are too the turn on and 75% temperature points. Try close to each other re-programming with the turn on point lower, and/or the 75% point higher. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 17: Troubleshooting
Verify that the air conditioning input is not being grounded or tied to +12v, unless the system is commanding it. Programmed values not Make sure you pressing the Prg button to save values, and not being saved the Skip button. Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 18: Mounting The Controller
The controller is NOT sealed against water, so ensure that any locations will be free from water splashes. Also, avoid any excessively hot areas under the hood. Figure 9 - Controller mounting dimensions Micro Autonomations LLC – Fan Controller v3 Document Rev 1.0...
Page 19: Warranty
(12) months from the date of sale of the original purchaser. Micro Autonomations LLC will repair this product free of charge if, in the judgment of Micro Autonomations LLC it has been proven defective within the warranty period. The product should be returned, at the customer expense, to the location of original purchase.