Autoformer, Progressive EMS, and PCS EMS

[redbaron73]

I am glamping in a place I assume had poor voltage. I was frequently getting low voltage errors from my progressive hw50c- EMS.

So I purchased a Hughes Autoformer. It is plugged into the pedestal, shore cord attached to HAF, Progressive HW50C-EMS between the ATS and shore cord.


I am still getting low voltage cut out.

The HW50C is showing 108V / 111V @ approx 65amps.

The PCS shows 117 / 119 @ 65 amps (this is inside the coach above driver display)

The HAF is NOT boosting. I have 5 green LEDs, and 2 unlit for the boost per line.

Either I have a faulty HAF and PCS or a faulty Progressive Hw50C-EMS.

Spot checking the outlets, I am seeing 118V

Based on all this data, I now believe I have a faulty HW50C.

Has anyone else experienced this? I plan on calling progressive in the morning, but was curious if others had dealt with this problem.

[tmw188]

Yes your PI unit may need to be calibrated. Call them anyway. Calibration may not fix it however and if that’s the case they may send you a new board. It’s a little work to put it in though. I’ll try to post the calibration procedures here if not they can email it to you. It’s easy however you will need a volt meter and a eye glass screw driver.

[redbaron73]

Thanks, that makes sense.

[Pierce36]

I had the same problem with my PT30x. It was reading only 114v, when my source power was 123v. Adjusted the potentiometer to match voltage.