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TROUBLESHOOTING
DISPLAY IS BLANK
If Power LED is not illuminated at the equipment
control module check the following:
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling
system is on.
• Make sure furnace door is closed securely.
HEATING SYSTEM DOES NOT RESPOND
(“HEATING” APPEARS ON SCREEN)
• Check for 24VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the heating
equipment to find the cause of the problem.
• Check for 24VAC between the heat terminal (W)
and the transformer common. If 24VAC is present,
the thermostat is functional. Check the heating
equipment to find the cause of the problem.
• Check for loose or broken wires between the
thermostat and the heating equipment.
COOLING SYSTEM DOES NOT RESPOND
(“COOLING” APPEARS ON SCREEN)
• Check for 24VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the cooling
equipment to find the cause of the problem
• Check for 24VAC between the cooling terminal (Y)
and the transformer common. If 24VAC is present,
the thermostat is functional. Check the cooling
system to find the cause of the problem.
• Check for loose or broken wires between the
thermostat and the cooling equipment.
FAN DOES NOT TURN ON IN A CALL FOR HEAT
• Check Installer Setting Fan Control In Heating /
Heat Pump Auxiliary Type, to make sure the fan
control is properly set to match the type of system.
HEAT PUMP ISSUES COOL AIR IN HEAT MODE,
OR WARM AIR IN COOL MODE
• Check wiring at the terminal block to confirm the
reversing valve is connected to the proper terminal.
O is active in cooling and B is active in heating.
HEAT/COOL BOTH ON AT SAME TIME
• Check Installer Setting Equipment Type, to make
sure it is set to match the installed heating/cooling
equipment.
• Check to make sure heating and cooling wires are
not shorted together.
HEATING EQUIPMENT IS RUNNING IN
COOL MODE
• Check Installer Setting Equipment Type, to make
sure it is set to match the installed heating/cooling
equipment.
“HEATING” IS NOT DISPLAYED
• Check Installer Setting Control Setup is set
correctly.
• Change the System Mode to Heat, and set
the temperature level above the current room
temperature.
“COOLING” IS NOT DISPLAYED
• Check Installer Setting Control Setup is set
correctly.
• Change the System Mode to Cool, and set
the temperature level below the current room
temperature.
Control
Outdoor, Remote, Leaving and Return temperature sensor Maximum distance: 300 feet
Room temperature measurement Display range: 32° to 99°F (0° to 40°C)
Return and Leaving temperature measurement Display range: -40° to 160°F (-40° to 71°C)
Outdoor temperature measurement Display range: -40° to 130°F (-40° to 55°C)
Setpoint temperature range
Heat: 40° to 90°F (4° to 32°C)
Cool: 50° to 99°F (10° to 37°C)
Setpoint humidity range
Humidification: 10% to 50% R.H.
Dehumidification: 40% to 90% R.H.
SPECIFICATIONS
Electrical
Operating voltage 24VAC (18 – 30VAC)
Current
Maximum: 2.5A (total), 1.0A (single output)
Maximum surge current: 5A
Environment
Temperature (shipping) -30° to 150°F (-34° to 65°C)
Temperature thermostat (operating) 32° to 120°F (0° to 48°C)
Temperature equipment control module (operating) 32° to 158°F (0° to 70°C)
Relative humidity Operating: 5% to 90% R.H. (non-condensing)
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