tekmar 540 Thermostat Installation - Manual (Page 25)

25 of 28 © 2011 D 540 - 12/11
Symptom Look for... Corrective Action
No Heat
H1 Symbol
H1 symbol indicates heat is on. Check if zone
valve or zone pump is operating.
Flashing
WWSD
Increase WWSD setting on tekmarNet ®
reset control.
Flashing
Away
Change User Switch to Normal scene 1.
Mode Auto or
Heat
Press Mode button to Auto or Heat mode.
No Cooling
C1 Symbol
C1 symbol indicates cooling is on. Check
if cooling relay and cooling equipment are
operating.
Flashing
Away
Change User Switch to Normal scene 1.
Mode Auto or
Cool
Press Mode button to Auto or Cool mode.
Heat or Cooling
on yet Fan off
Fan symbol
Fan symbol indicates fan is on. Check if fan
relay and fan equipment is operating.
Fan set to Off Ensure fan mode is set correctly.
Heat or cooling
on before
scheduled time
Optimum start “learns” the heat up and
cool off rate of the room and starts the
heating or cooling early so that the room is
comforable at the scheduled time.
Pressing button
does not increase
temperature
Flashing Max
Installer can increase the Maximum Set Room
Heat or Maximum Set Room Cool limits.
Pressing button
does not decrease
temperature
Flashing Min
Installer can decrease the Minimum Set Room
Heat or Minimum Set Room Cool limits.
Frequently Asked Questions