A: Primarily for Individuals who work in the Automotive HVAC Industry who can use one or both Mini-Drivers, are:
A: In answer to the first part ‘how do I test a blend door actuator’. Well there are many examples on the internet on how to do this, look at this one on YouTube for example www.youtube.com/watch?v=vWBGKfl7k24. However if in that video they were using my Tri-State Driver (Mini-Driver), All they would have to do is plug directly into the actuator in the car and position the shaft to meet up with the damper door and just drop the actuator onto the screw mounts. They show just moving it once and done, but that's really not true to life. It is a inefficient way to handle the job, and not the safest way to handle a brand new actuator that cost you money.
Open motor pins are often susceptible to electrostatic discharges or ESD that roll off our fingertips at a whim. The man in the video probably had rubber soled shoes on but wasn't grounded to the bench he was working at, meaning that when he added the 9V battery to the motor pins, the battery will absorb a voltage spike much like a capacitor, but the Tri-State Driver pins can't handle that type of a voltage spike.
That's just enough over voltage to slam the internal IC and cause future damage issues to pop up later. The one they were showing had a smart driver IC internal to the actuator itself. Tri-State Actuators are special, they need to be handled with care. The proper way to drive one in only to attach the wires the way he did, and then using a switch apply power to the connected pins.
That video got the job done, but it is always risky to handle electrical devices with general avoidance of caution.
A: These are the ways generally used by manufacturers of HVAC Modules:
This is performed in end of line testers.
A: 1. Using the vehicles HVAC Control Module - which has a D/A Drive IC to control maximum voltage and current to the actuator. This drive method prevents actuators from receiving excessive stall currents. Control heads are programmed to limit excessive driving time into end stops.
2. The Mini-Driver from Taskem-Tools Also Mimics the HVAC Module Control head. It has an internal D/A Drive IC which when activated, will internally limit the user from over driving the actuator/door just as the HVAC Control Module would. It’s not our intention to break doors, but to drive them safely so when the module is installed in customer vehicles they aren’t already pre-conditioned to fail.