I posted earlier this year about a recently-installed Infinity 24VNA6 hybrid propane system and ongoing issues with a high pressure fault code and subsequent lockouts. This has (mostly) been resolved after the installer and Carrier dealer have returned six times over the last two months. Each time they’d come, make some tweaks to the return duct work, or take some of the charge out. That fault code is mostly gone, though it still pops up every few weeks.
We were supposedly one of the first in NY State to get the 26 installed, and I was excited to have the most efficient model available. In addition to the high pressure issue early on, we’ve been plagued with fault codes galore, and a perplexing post-defrost logic that has stumped the Carrier dealer and the installer. Here’s what happens –
When the HP runs for a while, it will kick into defrost mode. When in defrost mode, it will display “heating HP+gas” and the blower will blow warm air. Defrost will run for a few minutes and then turn off. As soon as defrost turns off, the blower will turn on high with both the HP and gas furnace displaying off for 15-30 minutes, blowing cooler air throughout the house. We have some heat loss in our old farmhouse, and this causes the house temperature to drop from the set point of 72F to 67F or even below. There’s a 15-30 minute gap between when the HP gets out of defrost to when it will kick back into HP heating. On colder days, it will run at 100% and raise the temperature a few degrees, never reaching the set point, and kicking back into defrost mode, starting the cycle of vacillating heat over and over again. I often have to manually intervene and run on gas heat only to get the house temperature back to the set point.
I received an official email from Carrier a few weeks ago that there was a bug in the defrost mode, and that Carrier planned to update the software to fix this by setting my lockouts at 50F and running the software update. Software update came through, but it didn’t seem to fix anything. Has anyone heard of issues with the new Infinity 26 systems, or have any guesses why the post-defrost logic seems totally off? The post-defrost gap of turning any heat (gas or HP) back on leads to significant dips below the set point.
FWIW- our other ongoing fault codes/issues include:
Lost BTM Communication (happens once or twice a week)
Blower on after power up (multiple times per day)
Low-pressure switch open (new code that showed up a few days ago)
Energy consumption monitoring is totally wrong at the thermostat. On very cold days when I am running LP gas for long periods of time, it will show 0 gallons of consumption. Other days it will show exceptionally high LP consumption when it never went into aux LP mode at all.
We were supposedly one of the first in NY State to get the 26 installed, and I was excited to have the most efficient model available. In addition to the high pressure issue early on, we’ve been plagued with fault codes galore, and a perplexing post-defrost logic that has stumped the Carrier dealer and the installer. Here’s what happens –
When the HP runs for a while, it will kick into defrost mode. When in defrost mode, it will display “heating HP+gas” and the blower will blow warm air. Defrost will run for a few minutes and then turn off. As soon as defrost turns off, the blower will turn on high with both the HP and gas furnace displaying off for 15-30 minutes, blowing cooler air throughout the house. We have some heat loss in our old farmhouse, and this causes the house temperature to drop from the set point of 72F to 67F or even below. There’s a 15-30 minute gap between when the HP gets out of defrost to when it will kick back into HP heating. On colder days, it will run at 100% and raise the temperature a few degrees, never reaching the set point, and kicking back into defrost mode, starting the cycle of vacillating heat over and over again. I often have to manually intervene and run on gas heat only to get the house temperature back to the set point.
I received an official email from Carrier a few weeks ago that there was a bug in the defrost mode, and that Carrier planned to update the software to fix this by setting my lockouts at 50F and running the software update. Software update came through, but it didn’t seem to fix anything. Has anyone heard of issues with the new Infinity 26 systems, or have any guesses why the post-defrost logic seems totally off? The post-defrost gap of turning any heat (gas or HP) back on leads to significant dips below the set point.
FWIW- our other ongoing fault codes/issues include:
Lost BTM Communication (happens once or twice a week)
Blower on after power up (multiple times per day)
Low-pressure switch open (new code that showed up a few days ago)
Energy consumption monitoring is totally wrong at the thermostat. On very cold days when I am running LP gas for long periods of time, it will show 0 gallons of consumption. Other days it will show exceptionally high LP consumption when it never went into aux LP mode at all.
source https://hvac-talk.com/vbb/showthread.php?2224107-Carrier-Greenspeed-Infinity-SEER-26-–-Problems-Galore-Deforst-Logic&goto=newpost
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