"E1" Error Code on Dometic CCC2 Thermostat

[TechWriter]

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?

[TechWriter]

Got the fix: Dometic CCC2 Thermostat E1 Error Recovery.

[Chris_Bryant]

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]

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]

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.