TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2013 Honeywell International Inc.
62-0311—13 KK Rev. 10-13
Printed in United States
Activity Sensing does
not exit when button
pressed
All buttons are locked. Make sure keypad lockout is disabled. Set IS code 18, value = 0.
Freeze Protection
does not activate
System Type is set to
Cool.
Freeze protection is not activated when system type is Cool (IS
code 2; value = 1). Change System Type.
System mode is not Off. Set the System mode button to Off.
Auto Fan Reset does
not activate
Incorrect IS code. Set the Installer Setup code #24 to Enabled (value = 1 or 2).
Calling for Heat/Cool
setpoint couldn't be
satisfied.
Only after the setpoint is satisfied, will the auto fan reset timer
activate.
Table 8. Troubleshooting. (Continued)
Symptom Possible Cause Action