9 TROUBLESHOOTING
CONTINUED FROM SEVENTH PAGE |
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Symptom | Possible Cause |
| Corrective Action | |
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Heat, Cool or Fan Runs Constantly. | 1. | Possible short in wiring. |
| Check each wire connection to verify they are not |
| 2. | Possible short in thermostat. |
| shorted or touching together. No bare wire should |
| 3. | Possible short in heat/cool/fan system. |
| stick out from under terminal screws. Try resetting |
| 4. | Fan Switch set to Fan On. |
| the thermostat as described below. If the condition |
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| persists the manufacturer of your system or |
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| service person can instruct you on how to test the |
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| Heat/Cool system for correct operation. If the |
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| system operates correctly, replace the thermostat. |
Furnace Cycles Too Fast or Too Slow | 1. | The location of the thermostat and/or the |
| Digital thermostats normally provide precise |
(narrow or wide temperature swing) |
| size of the Heating System may be |
| temperature control and may cycle faster than |
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| influencing the cycle rate. |
| some older mechanical models. A faster cycle |
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| rate means the unit turns on and off more |
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| frequently but runs for a shorter time so there is |
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| no increase in energy use. If you would like to |
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| increase the cycle time, change the cycle rate to |
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| “SL” in the configuration menu. It is not possible to |
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| shorten the cycle time. If an acceptable cycle rate |
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| is not achieved as received or by changing the |
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| cycle rate. Contact a local service person for |
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| additional suggestions. |
Cooling Cycles Too Fast or Too Slow | 1. | The location of the thermostat and the size |
| The cycle rate for cooling is fixed and can not be |
(narrow or wide temperature swing) |
| of the Cooling System can influence the |
| adjusted. Contact a local service person for |
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| cycle rate. |
| suggestions. |
Thermostat Setting and Thermostat | 1. | Thermostat thermometer setting requires |
| The thermometer can be adjusted +/- 4 degrees. |
Thermometer Disagree |
| adjustment. |
| See Temperature Display Adjustment in the |
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| Configuration menu. |
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Thermostat Does Not Follow Program | 1. | AM or PM set incorrectly in program. |
| Check current clock and program settings |
| 2. | AM or PM set incorrectly on the clock. |
| including the AM or PM designations for each |
| 3. | Voltage spike or static discharge. |
| time period. If a voltage spike or a static discharge |
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| occurs use the Reset Operation listed above. |
Blank Display and/or Keypad | 1. | Voltage spike or static discharge. |
| If a voltage spike occurs use the Reset Operation |
Not Responding |
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| listed above. |
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Clock Loses or Gains Time | 1. | Loss of power to thermostat. |
| The thermostat will maintain its program in |
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| memory even with no power but the clock time |
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| will be incorrect when power is restored. |
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| See No Heat/No Cool/No Fan (common problems) |
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| above for items to check in the system. |
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Heat or Cool Starts Early | 1. | EMR activated. |
| See Configuration Menu (Item 4). |
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