VanEE Power Off/On Damper Postion

[NH]

Hi Folks,

I have an old VanEE 90 HRV.   The unit does not have LEDs on the front, just a High/Low/Auto switch so it is a 20+ year old model.   In the past I remember seeing the damper cycle when I watch it upon power up (with the door switched button held closed).   Now it seems to be open all the time so I'm concerned the defrost cycle has not been working over the winter. Am I remembering correctly? Should normally be closed when powered down?

Thanks,
Neal

[Admin]

Does the damper motor feel warm to touch?  If it's getting power and not moving it's likely seized.

3.1.1 BOOT SEQUENCE
The unit boot sequence is similar to a personnal computer boot sequence. Each time the unit is plugged after being unplugged, or after a power failure, the unit will perform a 30-second booting sequence before starting to operate. During the booting sequence, the integrated control LED will light GREEN or AMBER for 5 seconds, and then will shut off for 2 seconds. After that, the LED will light RED for the rest of the booting sequence. During this RED light phase, the unit is checking and resetting the motorized damper position.
Once the motorized damper position completely set, the RED light turns off and the booting sequence is done.
NOTE: No command will be taken until the unit is fully booted.

[NH]

I took the motor out and powered directly and it is indeed seized.  I also verified with a voltmeter that there is power from the control board.  I did reach out to Eden Energy Equipment and they told me I can no longer buy that part so now I'm trying to see how I can jury-rig it with an off-the-shelf motor.  The SYNCHRON motor that was in it has no markings whatsoever, I'm thinking it was a CW rotation at 4 or so rpm.  Power to open, spring to close, the dampers.  Any guidance you can give me would be appreciated.  PS: the 3.1.1 quote is not relevant as my unit is older than the type with the LEDS.

[Admin]

Is it 110V or low voltage?

https://retrozone.com/38586r-synchron-motor.html?srsltid=AfmBOoqWT8tkRgnI3c9fxHF-it9V1QuHW4frt1bWbcsiGVqcjPUNbl-_