Quote:
Originally Posted by ozrien
So judging from the Self-Test the PCM reports that the "Pressure is not full" despite the pressure-switch inputs on the PCM not being wired to anything. That is likely the root cause for WDB's symptom, and not firmware. This sounds like hardware and your "other PCM" likely works regardless of what firm is in it.
To further confirm it's not a firm issue, I put up 1.60 PCM firm (one-dot-sixty) at...
http://www.crosstheroadelectronics.c...ation-1.60.crf
... Flash 1.60 back into your bad PCM and I bet you will still find that the self-test still reads "Pressure is not full" despite having the PCM not connected to the pressure-switch.
For any given functional PCM : When the pressure switch is not connected, Pressure should read as "Pressure is Full", regardless of all other factors. This is deliberate so an unplugged pressure switch causes compressor to stop.
dumbuya, can you do the same check? Unplug the pressure-switch from the PCM and run the Self-Test to see if the pressure still reads "Pressure is not full".
At any rate dumbuya and WDB, I recommend contacting support@crosstheroadelectronics.com for next steps. |
Confirmed. Reflashed the suspect PCM back to 1.6 and the same behavior was observed. Removing the pressure switch from the PCM should not allow the compressor to run, but it still runs. So it looks like a hardware problem with this specific PCM. Put in our other PCM in and it works perfectly.
We took a picture of the board near the pressure switch contacts and there might be some anomaly there (you'll have to zoom in a little), but we'll get a replacement PCM anyway.
Thanks Omar for your assistance!