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MinimumOn Timer
Once theequipment has been turned on, it must remain on for 3 minutes.A change
in mode or setpoint will can cel this timer.
CycleTimer
Basedon theselection of 2, 4, or 6 cycles per hour,this timer is set to 30, 15, or 10
minutes. This much timemust elapse from the start of one cycle before another
cycle can start.It serves to impose the cycles per hour limits. It can be defeated for
one cycleby simultaneously pressing the FANand UP keys.
AutoChangeover Timer
To prevent unnecessary cycling between heatingand cooling modes, this timer
prevents a changeover to theopposite mode until a demand exists in the opposite
mode for20 minutes. It is defeated when setpoints are changed sothat the opposite
mode isimmediately available if desired.
ErrorCodes
Twoerror messages indicate problems with the thermostat’soperation. If the room
temperaturesensor fails, the temperature display will show ----,two dashes. If there
isa n internal memory failure, the tempe rature display will show E4. The remedy f or
each of theseis to replace the thermostat.
Table1 shows the thermostat outputs for each availablestage of heating or cooling.
Itmay b e usefulin checkout or troubleshooting.