need help! 100 degrees and Ac problem

[bench]

WE hae 3 AC units on our Camelot. The middle ac just quit. The thermostat indicates no communication with that unit (nothing appears onscreen when I select the middle unit). I can't recall how to reset the system but believe its more than that. Thanks in advance for you help.

[MSHappyCampers]

If it uses the 4-conductor telephone-type flat cable from the thermostat to the A/C unit then it may be just a poor connection on one of the plugs. Open the access to that unit and unplug and re-plug the connector several times to clean the contacts.

[Pusherpilot]

Another possibility is the controller for that unit has failed or the connections on it are in need of the same treatment as described by MSHAPPYCAMPER. I had one come off the unit on mine but mine is a 2 a/c rig.
Ron

[chuckftboy]

Try powering them all off and disconnect the 12 volts for a minute and see if it will reset. Worth a try and really easy.