I have a Tranquility 27 that keeps going into a fault lockout mode. Fast Flash on the CXM board. The system has been installed for about 6 years and has ran fine for the most part up until now. (Except for some problems during the initial install)

The unit will run for about an hour or so and then go into a fault retry condition and it will try 3 times and then go into a lockout mode with the fast flash LED. I do a reset by shutting off the thermostat and then power to the breaker. And the process will start again, will run about an hour and then lockout.

If someone could help me on where to even start I would appreciate it. The water pressures are listed below. I will have to get water temp's later because my thermometer seems to have quit working.

EWP : 18 psi LWP : 12 psi

This has been solved. Thanks all.

Can you tell us what was the problem and how it was solved?
I seem to have a similar issue of my Climate Master seeming to stop working after operating for a few hours. I haven't checked to see if the board was flashing anything since this has happened usually at night when I trun on the cooling and then notice after a few hours that the cooling seems to have stopped even as the fan on the air handler is blowing.