bryant 579F300 down - need help!

[HeavyD]

I have a bryant 579F300 rooftop unit with honeywell commercial zoning and honeywell T8624D t-stats.

the system was down so I did a reboot on the panel the system went into purge and them into heating mode. I noticed after a while that the t-stats were satisfied but each t-stat kept calling for heat. I have four zones and all four were calling for heat, however as the temp came up ALL kept calling. I shutdown each t-stat and the system shutdown. I tested each stat and they seemed to work fine. I have had problems with these t-stats before and have replaced them and all was fine, but I have never seen four t-stats go bad at the same time. Has anyone ever run across this before? any ideas?

[NeFitter]

You have one RTU? With 4 stats for that one RTU. Do you have remote sensors for the stats. And are the stats linked to multizone dampers.The biggest problem I see is that its a Bryant=JUNK

[HeavyD]

I have a total of 7 RTU's at this site. The four t-stats are all wired to this one unit. No remote sensors are wired to the stats. Each stat is wired to its own damper. System worked without a problem for five years, just starting to hit maintenance issues.

[HeavyD]

I have a total of 7 RTU's at this site. The four t-stats are all wired to this one unit. No remote sensors are wired to the stats. Each stat is wired to its own damper. System worked without a problem for five years, just starting to hit maintenance issues.

[keepyoucool2003]

What type of zone controller is it? You had a call for heat from all four zones and all four zones were ABOVE their heating setpoint?

There is nothing wrong with Bryant equipment, this isn't the bashing form.

[plain spoken]

You have one RTU? With 4 stats for that one RTU. Do you have remote sensors for the stats. And are the stats linked to multizone dampers.The biggest problem I see is that its a Bryant=JUNK

Besides the fact that you can't read (He said he had a zoning panel in his post), you also have no idea what you are talking about. How is the fact that the THERMOSTATS are calling for heat when they should not be mean the unit is junk?

[HeavyD]

What type of zone controller is it? You had a call for heat from all four zones and all four zones were ABOVE their heating setpoint?

There is nothing wrong with Bryant equipment, this isn't the bashing form.

I have two panels; TrolAtemp Model TZ-3 - Revision 4 series. I also have one additional zone panel; TrolAtemp Add-a-zone Model TAZ - Revision 3. Yes all four zones were calling and all four were above setpoints. I have been having some issues with these stats (doing weird stuff just like this) but I've never had four stats go bad at once. The two larger areas I left the stats OFF. The system is holding temps in the two smaller rooms.

[NeFitter]

Besides the fact that you can't read (He said he had a zoning panel in his post), you also have no idea what you are talking about. How is the fact that the THERMOSTATS are calling for heat when they should not be mean the unit is junk?

What is your problem. Oh nevermind your from Arkansas

[freddy-b]

Hahahaha......... you go propeller boy!