I am assuming you have the new Infinity Touch control (black). If the screen is blank, you've either lost low voltage power (an issue at your furnace) or the unit isn't properly seated on the backplate. Pull the thermostat off of the wall and reseat it properly and if this does not work, you'll probably need a pro to come troubleshoot low voltage issues.
SOURCE: Carrier Infinity DC motor drive problems
Contact the company that installed the unit. Its new, under warranty, Anything you do could void the warranty. If they do not take care of the problem without charges contact Carrier and tell them what's going on. The company who installed the unit is responsible for making it run correctly. Good luck. kstfas
SOURCE: Carrier Infinity Control Programming Issue
Open the flap, and press and hold the advanced button for 10 sec. you will be in the Installer setup screen. scroll down to the setup subfolder and select thermostat and it will be in there.
SOURCE: carrier infinity control SYSTXCCUID01-B sensor communication erro
There should be a little black sensor bulb outside either on the unit normally under the electrical panel or inside it. It sound like the wire has come off or been disconected. It needs that on to properly run. Your control is trying to communicate with the outdoor unit and can not.
SOURCE: Carrier Low pressure lockout - 4 hours
If the low pressure sensor trips, the least likely problem is a bad sensor, more than likely, you have a leak in the system, this will require leak location, repair and recharged.
Also posible, a dirty air filter, plugged indoor coil, causing the indoor coil to ice up, causing a temporary low pressure issue, solution would be to clean the coils, power the system down and restart and test.
If this has been helpful, please rate the new guy :)
If you have any other questions, please give me a shout.
Sincerely,
Paul Gibson
SOURCE: carrier infinity a/c thermostat screens are blank - no power
There is a fuse in the control panel, and depending how they wired it may be a inline fuse. also there is a fuse in the airhandler also they both should be a 5 amp auto fuse.
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