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FocusPRO
™
TH6110D Programmable Thermostat
13
Installation Guide
12
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most
problems can be corrected quickly and easily.
Display is blank • Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA alkaline batteries
are correctly installed (see page 7).
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
In case of difficulty
Heating system
does not respond
(“Heat On”
appears on
screen)
• Check for 24 Vac at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
heating equipment to find the cause of the problem.
• Check for 24 Vac between the heat terminal (W) and the transformer
common. If 24 Vac 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.
“Cool On” or
“Heat On”
is flashing
• Compressor protection timeout is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
Cooling system
does not respond
(“Cool On”
appears on
screen)
• Check for 24 Vac at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
cooling equipment to find the cause of the problem
• Check for 24 Vac between the cooling terminal (Y) and the transformer
common. If 24 Vac 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 Setup, Function 3 (Fan Control), to make sure the fan
control is properly set to match the type of system (see page 8).
Heat pump
issues cool air
in heat mode,
or warm air in
cool mode
• Check Installer Setup, Function 2 (Changeover Valve), to make sure it is
properly configured for your system (see page 8).
Heat/cool both
on at same time,
or heat does
not turn off
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 8).
• Check to make sure heating and cooling wires are not shorted together.
Heating equip-
ment is running
in cool mode
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 8).
Cannot change
system setting
to “Heat”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating equipment (see page 8).
• Change Installer Setup, Function 12 (System Setting) to Manual
or Auto
Changeover (see page 8).
Cannot change
system setting
to “Cool”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed cooling equipment (see page 8).
• Change Installer Setup, Function 12 (System Setting) to Manual
or Auto
Changeover (see page 8).
“Heat On” is
not displayed
• Change the System Setting to Heat
, and set the temperature level above
the current room temperature.
“Cool On” is not
displayed
• Change the System Setting to Cool, and set the temperature level below
the current room temperature.
Accessories & replacement parts
Please contact your distributor to order replacement parts.
Battery holder ......................................................Part Number 50007072-001
Cover plate assembly ........................................Part Number 50002883-001
(Use to cover marks left by old thermostats.)
Specifications
Temperature Ranges
• Heat: 40° to 90°F (4.5° to 32°C)
• Cool: 50° to 99°F (10° to 37°C)
Operating Ambient Temperature
• 32° to 120°F (0° to 48.9°C)
Shipping Temperature
• -20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
• 5% to 90% (non-condensing)
Physical Dimensions
• 3-9/16” H x 5-13/16” W x 1-1/2” D
• 91 mm H x 147 mm W x 38 mm D
Electrical Ratings
Terminal Voltage (50/60Hz) Running Current
W (O/B) Heating 20-30 Vac 0.02-1.0 A
(Powerpile) 750 mV DC 100 mA DC
Y Cooling 20-30 Vac 0.02-1.0 A
G Fan 20-30 Vac 0.02-0.5 A