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TechWriter's avatar
TechWriter
Explorer
Jun 24, 2013

"E1" Error Code on Dometic CCC2 Thermostat

My Penguin II rear air started cycling on/off & then I got "E1" code on my 12-button CCC2 thermostat for both of my two AC zones.

I was able to clear the E1 code doing a CCC2 reset per the install manual, but after the CCC2 reset, Zone 2 disappeared although Zone 1 still works.

Anyone have this happen?
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Jun 24, 2013
    90% of the time , an end on the data cable is bad. Easy enough to replace- pay attention to polarity, it's different than a phone cable.
  • TechWriter's avatar
    TechWriter
    Explorer
    Jun 24, 2013
    Ranger Smith wrote:
    A simple google search found it

    E1 Loss of communication between the CCC 2 thermostat and all system power
    module boards. System will shut down.
    E1 Loss of communication between the CCC 2 thermostat and an individual system
    power module board. The LED will display error code EI and the zone number
    that lost communication. Any additional zones that loose communication will
    blink in addition to the current zone.

    Tx, but I know what it is. I want to know if anyone else has had this problem.
  • Ranger_Smith's avatar
    Ranger_Smith
    Explorer
    Jun 24, 2013
    A simple google search found it

    E1 Loss of communication between the CCC 2 thermostat and all system power
    module boards. System will shut down.
    E1 Loss of communication between the CCC 2 thermostat and an individual system
    power module board. The LED will display error code EI and the zone number
    that lost communication. Any additional zones that loose communication will
    blink in addition to the current zone.

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