legalguy Posted November 17, 2009 Share Posted November 17, 2009 I have a Venstar T1800 thermostat with an ISY99. I just started using heat for the first time since installation. Cool has worked correctly according to my program for the last 8 months. I cannot seem to set the thermostats to heat through the ISY99. The webpage display changes when I toggle to heat and/or adjust the setpoint. But when I query the thermostat, the setpoint goes right back to where it began. I just tried to set the thermostat mode to auto and the mode and setpoint seem to "stick". Could there be a wiring or installation error ? Thanks Link to comment
Michel Kohanim Posted November 18, 2009 Share Posted November 18, 2009 Hi legalguy, Please upgrade to either of the following firmware: 1. 2.7.6 Beta (http://forum.universal-devices.com/viewtopic.php?t=3007) OR 2. 2.7.7 Alpha (http://forum.universal-devices.com/viewtopic.php?t=930) With kind regards, Michel I have a Venstar T1800 thermostat with an ISY99. I just started using heat for the first time since installation. Cool has worked correctly according to my program for the last 8 months. I cannot seem to set the thermostats to heat through the ISY99. The webpage display changes when I toggle to heat and/or adjust the setpoint. But when I query the thermostat, the setpoint goes right back to where it began. I just tried to set the thermostat mode to auto and the mode and setpoint seem to "stick". Could there be a wiring or installation error ? Thanks Link to comment
legalguy Posted November 18, 2009 Author Share Posted November 18, 2009 Can you give me a bit of direction please. I downloaded 2.76 - did not unzip per instructions Tried to log in with isy - autoupdate - did not work Logged in with my normal login Tried to manually upgrade Got error message: Upgrade Failed:Invalid or incompatible upgrade file Link to comment
MikeB Posted November 18, 2009 Share Posted November 18, 2009 Be sure you are downloading the correct upgrade file. Note that there are 2 files - one for the ISY-26, and another for the ISY-99. Be sure to read the upgrade instructions carefully. In short, be sure you are on a stable network connection (wired if possible) and disable any anti-virus/firewall software you might be running. Link to comment
legalguy Posted November 18, 2009 Author Share Posted November 18, 2009 I got it now. The new thermostat programming for Auto Mode works great. Thanks! Link to comment
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