Dometic CCII Control Board for Penquin II
Hi, new here to the forum. One of my roof AC units quit. It doesn't do anything. I measured voltage on the board (115VAC) but nothing coming out of the board. The board has P/N 3312227.000 on it. A...
Forum Discussion
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
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
