I'm hoping I can get some insight into what is going on with my system, a Carrier Infinity unit. I have been getting a code "161 Excess Static Pressure Stagedown" in the LAST 10 SYSTEM EVENTS section of the Infinity service menu. No faults, but just this code and one other in the system events--Thermal Cutout in Low Stage. However, the thermal cutout in low stage event does not seem to be happening on a routine basis.
Can someone tell me what the Excess Static Pressure Stagedown message means, and under what conditions it might be happening? I have my airflow limits set to maximum on all my zones (3 zones total), so I don't really understand why this is going on.
Also, what causes the thermal cutout in low stage message?