Battery Changeout- If the installation requires tile
usage of batteries, the batteries will require replacement every 12 months.
Open thermostat door and slide the battery compartment door to the fight. Remove two AA alkaline batteries. Install two new AA alkaline batteries following the polarity markings (+ /
NOTE: If installation is
Error Codes
Table 1 -- Error Codes
SYMPTOM |
| WHAT TO CHECK |
Blank LCD | Check for 24 | vac between R and C at terminal connections or battery. |
Temperature | sensor reading out of range. Check sensor for damage. If recycling power |
does not clear display, thermostat should be replaced.
"E2" | on temperature | display | Brownout condition | or too | low of voltage to thermostat. | Double check wiring and | check for | |||||||
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| 24 vac between R and C. E2 will clear 15 sec after proper voltage is restored. |
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"E3" | on temperature | display | The | outdoor temperature | sensor | is open, not connected, or shorted. |
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"SERVICE FILTER" on temperature display | After | the selected number | of hour | of blower | operation | "FILTER" will display on LCD. This is | ||||||||
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| to remind the home owner to "check" the filter. Press RESET FILTER button to clear display | |||||||
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| and reset timer to 0. |
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Cooling | will | not | come | on | Select COOL mode. Set desired temperature | to 10° F below room temperature. | Simulta- | |||||||
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| neously press FAN and INCREASE TEMPERATURE buttons to defeat timers. Check for | |||||||
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| COOL ON icon and 24 vac at Y | |||||||
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| 3roblem is with equipment or wiring. If not present, replace thermostat. |
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Heating | will | not | come | on | Select HEAT mode. Set desired temperature | to 10 ° F above room temperature. | Simulta- | |||||||
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| neously press FAN and INCREASE TEMPERATURE buttons to defeat timers. Check for | |||||||
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| HEAT ON and 24 vac at Y | |||||||
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| tioner) terminal. If present, thermostat is okay and problem is with equipment or wiring. If | |||||||
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| not present, replace | thermostat. |
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