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| TROUBLESHOOTING |
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Symptom |
| Possible Cause |
| Corrective Action | |
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No Heat (continued) |
| 5. Heating system requires service or |
| Diagnostic: Press SYSTEM button to HEAT and | |
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| thermostat requires replacement. |
| raise the setpoint above room temperature. Within a | |
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| few seconds the thermostat should make a soft click | |
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| sound. This sound usually indicates the thermostat | |
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| is operating properly. If the thermostat does not | |
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| click, try the reset operation listed above. If the | |
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| thermostat does not click after being reset contact | |
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| your heating and cooling service person or place of | |
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| purchase for a replacement. If the thermostat clicks, | |
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| contact the furnace manufacturer or a service | |
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| person to verify the heating is operating correctly. | |
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No Cool |
| 1. SYSTEM button not pressed to COOL. |
| Press SYSTEM button to COOL and lower setpoint | |
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| below room temperature. | |
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| 2. Loose connection to thermostat or |
| Verify thermostat and system wires are securely | |
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| system. |
| attached. | |
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| 3. Cooling system requires service or |
| Same procedure as diagnostic for No Heat condition | |
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| thermostat requires replacement. |
| except set the thermostat to COOL and lower the | |
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| setpoint below the room temperature. There may be | |
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| up to a five minute delay before the thermostat | |
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| clicks in Cooling. | |
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Heat, Cool or Fan |
| 1. Possible short in wiring. |
| Check each wire connection to verify they are not | |
Runs Constantly |
| 2. Possible short in thermostat. |
| shorted or touching together. No bare wire should | |
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| 3. Possible short in heat/cool/fan |
| stick out from under terminal screws. Try resetting | |
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| system. |
| the thermostat as described above. If the condition | |
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| 4. FAN Switch set to Fan On. |
| persists the manufacturer of your system or service | |
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| person can instruct you on how to test the Heat/Cool | |
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| system for correct operation. If the system operates | |
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| correctly, replace the thermostat. | |
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Furnace |
| 1. The location of the thermostat and/or |
| Digital thermostats normally provide precise | |
(Air Conditioner) |
| the size of the Heating System may |
| temperature control and may cycle faster than some | |
Cycles Too Fast |
| be influencing the cycle rate. |
| older mechanical models. A faster cycle rate means | |
or Too Slow (narrow or |
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| the unit turns on and off more frequently but runs for | |
wide temperature swing) |
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| a shorter time so there is no increase in energy use. | |
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| If you would like to increase the cycle time, choose | |
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| SL for slow cycle in the menu, step 4. If an accept- | |
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| able cycle rate is not achieved as received or by | |
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| choosing slow cycle, contact a local service person | |
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| for additional suggestions. | |
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Thermostat Setting & |
| 1. Thermostat thermometer setting |
| The thermometer can be adjusted +/- 4 degrees. | |
Thermostat Thermometer |
| requires adjustment. |
| See Temperature Display Adjustment in the | |
Disagree |
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| Configuration Menu section. | |
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Blank Display and/or |
| 1. Voltage spike or static discharge. |
| Use the Reset Operation at top of previous page. | |
Keypad Not Responding |
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Heat Setpoint will |
| 1. The desired setpoint conflicts with the |
| Change system mode to COOL. Raise the Cool | |
not Respond to the |
| setpoint of the COOL mode. |
| setpoint. Return to HEAT mode and set desired | |
Temperature Up Key |
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| temperature. | |
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Cool Setpoint will |
| 1. The desired setpoint conflicts with the |
| Change system mode to HEAT. Lower the Heat | |
not Respond to the |
| setpoint of the HEAT mode. |
| setpoint. Return to COOL mode and set desired | |
Temperature Down Key |
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| temperature. | |
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