Dometic CCII Control Board for Penquin II

Doug, thanks for the reply!

1. CCC2
2. You need to add more info

OK. See below.

3. Does the CCC2 show a display for BOTH Zones? Or does the AC that is inop has no Zone display?

The inop is the 2nd AC on Zone 1. I have 2 Zones but 3 ACs. Display is normal.
This is in a 2017 Cedar Creek.

4. It is extremely RARE for a CCC2 wall tstat and upper AC board to be defective.

I hope that is the case.

5. The CONTROLS are 12 volt, NOT 120 volt. So, most common problem on CCC2 systems is lack of communication for the Inop Zone. AND, most common failure is corroded Communication cable quick connect ends.

OK. I did see those. I will see if I can find them locally today. Might be tomorrow before I get them replaced due to rain here today.
I also saw an unused wire with a connector. I think it was 2 wires in a plug. Is that likely for a remote temp sensor? I was always thinking it would be nice to put that unit on a separate zone.

6. The COM cables use RJ22 modular ends and use a standard 4 wire flat Phone TYPE cable. But NOT wired like a phone cable. You cannot use a standard prebuilt phone cable to test. The ends on a COM cable the wires are reversed.

OK.

7. Most common failure of a Penguin COM cable is corrosion where the ends are plugged in, in front of the evaporator due to the moist environment. There are 2 COM wire cables plugged into the upper board. Then those 2 wires go about 18 inches and are connected with a quick connect splice at the evaporator area. IF when you check, I always cut off and replace the RJ11 connections(all of them on the zone). Takes 5 minutes and that removes a bad connection and usually the corrosion will be very evident.

OK. Been a long time since I used any of those. I will see if I still have my tool. Any suggestions on connectors? Better ones to look for?


8. BOTH roof AC units have this com cable between them. So you need to check the operating AV Com cables also. Usual connection is --Wall tstat to Zone 1, then a Com Cable to Zone 2. That is why each AC control boards have 2 Modular connections. Doug

Since I have 3 AC units, Are all 3 usually daisy chained together? I have 2 ACs on Zone 1 in the main living area. Zone 2 is bedroom.
Are there diagrams anywhere that show this detail?
Thank you much!

1. CCC2
2. You need to add more info
3. Does the CCC2 show a display for BOTH Zones? Or does the AC that is inop has no Zone display?
4. It is extremely RARE for a CCC2 wall tstat and upper AC board to be defective.
5. The CONTROLS are 12 volt, NOT 120 volt. So, most common problem on CCC2 systems is lack of communication for the Inop Zone. AND, most common failure is corroded Communication cable quick connect ends.
6. The COM cables use RJ22 modular ends and use a standard 4 wire flat Phone TYPE cable. But NOT wired like a phone cable. You cannot use a standard prebuilt phone cable to test. The ends on a COM cable the wires are reversed.
7. Most common failure of a Penguin COM cable is corrosion where the ends are plugged in, in front of the evaporator due to the moist environment. There are 2 COM wire cables plugged into the upper board. Then those 2 wires go about 18 inches and are connected with a quick connect splice at the evaporator area. IF when you check, I always cut off and replace the RJ11 connections(all of them on the zone). Takes 5 minutes and that removes a bad connection and usually the corrosion will be very evident.
8. BOTH roof AC units have this com cable between them. So you need to check the operating AV Com cables also. Usual connection is --Wall tstat to Zone 1, then a Com Cable to Zone 2. That is why each AC control boards have 2 Modular connections. Doug