I have a Carrier Infinity System with the Air Purifier System in my new home (system started up in February). In the past few days I have started having the "System Malfunction" message display on my controller and the unit seems to stop cooling at times. I talked with my tech and he is unable to get out here yet (extremely busy right now), but he told me how to "reset" the system by turning the system off, turning the breakers off, then turning everything back on. That works temporarily, but then it eventually stops cooling again.
I know this is not a DIY forum and I AM getting a tech out here sooner or later (I'm hoping he can get out here sooner!), but I'm just curious about a few things. One of the many faults that I am getting is "Excess Static Pressure Stagedown" (others are "Thermal Cutout in Low Stage", "Thermal Lockout in Low Stage", and "Control Fault"...I think the control fault is from when I kill the power based off the timestamp). I was wondering if I should be running the regular filters in my return still since I have the Air Purifier with Cartridge (I am right now). I just wasn't sure if this is adding the high static pressure. The static pressure is around .96-1.01 with the compressor running (drops to .77 with it off and just the fans running). I was messing around and seeing what happened if I removed some of the filters. If I removed the filters in the return, it dropped down to .89 or so with the compressor running, then I removed the air purifier cartridge and it dropped to around .72. From what I can tell, I should be replacing the cartridge once a year, but I'm guessing I should go ahead and replace it since it's new construction and there was alot of dust in the home.
Any ideas where my problem is starting from? I'm going to still have the tech come out, but in the meantime I'm going to replace ALL of the filters (maybe leave the return filters out???). I've never dealt with a unit with the air purifier, so I'm not sure if that takes the place of the return filters, but I really wouldn't think so.
I also thought it was strage that all of the faults came while the unit was running in low stage and not high stage, but I'm by no means a HVAC guy!
Any thoughts or suggestions would be helpful. I've already gotten my faults to my tech, but he seemed a little stumped, so I'd like to have some suggestions for him if he can't find anything when he gets here.