80 Series Thermostats
53
Troubleshooting
Symptom
Possible Cause
Corrective Action
No Heat/
No Cool/
No Fan
(common
problem)
1.) Blown fuse or tripped circuit
2.) Furnace power switch to OFF
3.) Furnace blower compartment door panel
loose or not properly installed
4.) Loose connection to thermostat or system
1.) Replace fuse or reset breaker
2.) Turn switch to ON
3.) Replace door panel in proper position to engage safety interlock or
door switch
4.) Tighten Connection
No Heat
1.) System not set to Heat
2.) Loose connection to thermostat or system
3.) Heating System requires service or
thermostat requires replacement
1.) Set thermostat to Heat.
2.) Verify thermostat and system wires are securely attached.
3.) Diagnostic. Set System to Heat and raise the setpoint above room
temperature. Within five minutes the thermostat should make a soft click
sound and “Heat On” should appear on display. This sound indicates the
thermostat is operating properly. If the thermostat does not click, try the
reset operation listed below. If the thermostat clicks, contact the furnace
manufacturer or a service person to very the heating system is operating
correctly.
No Cool
1.) System not set to Cool
2.) Loose connection to the thermostat or
system
3.) Cooling System requires service or
thermostat requires replacement
1.) Set thermostat to Cool.
2.) Verify thermostat and system wires are securely attached.
3.) Diagnostic. Set System to Cool and lower setpoint below room
temperature. Same procedures as diagnostic for “No Heat” condition
except set the thermostat to Cool and lower the setpoint below the room
temperature. There may be up to a five minute delay before the
thermostat clicks in Cooling if the compressor lock-out option is selected
in the installer menu. (see INSTALLER MENU, item 50).
Heat, Cool or Fan
Runs Constantly
Possible short in wiring, thermostat, heat, cool, or
fan system.
Check each wire connection to verify they are not shorted or touching other
wires. Try resetting the thermostat. If the condition persists contact your HVAC
service person.
Содержание 80 Series
Страница 1: ...80 Series Thermostats 1 Emerson 80 Series Thermostats ...
Страница 2: ...Business and Product Overview ...
Страница 19: ...Technical ...
Страница 32: ...Install ...
Страница 35: ...80 Series Thermostats 35 Instruction Sheets 1F85U 42PR 1F85U 42NP 1F85U 22PR 1F85U 22NP ...
Страница 44: ...80 Series Thermostats 44 Installer Configuration Menu ...
Страница 49: ...80 Series Thermostats 49 Homeowner User Menu Setting Time and Day Setting Schedules Homeowner User Menu ...