Table 5. Alert Codes and Troubleshooting | Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer | |||
alert button. Minor and Moderate alerts are found only in the Installer alert button. | ||||
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Alert |
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Code | Priority | Alert Text | Steps to clear | |
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10 | Critical | (Stat) The thermostat has found an unknown | An unknown device is seen on the subnet in or outside of configuration mode. Clear by reconfiguring | |
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| device on the system. | the system. Press the setup tab, press start, and press confirm. If problem persists, then check all | |
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| DEVICE connections to make sure they are icomfort−compatible. | |
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11 | Critical | (Stat) The thermostat cannot find a previously | Check all connections and cycle system power. If problem persists, clear by reconfiguring the sys- | |
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| installed unit. | tem. Press the setup tab, press start, and press confirm. If problem persists, then check all DEVICE | |
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| connections to make sure they are icomfort−compatible. | |
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12 | Critical | (Stat) The thermostat cannot find an icomfort− | Thermostat did not find an Indoor Unit. Make sure there is an icomfort indoor unit on the system. | |
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| enabled indoor unit. | Check R, i+, i− and C connections, ohm wires and cycle power. Replace indoor unit control board if | |
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| there is no response. | |
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14 | Critical | (Stat) The thermostat found more than one ther- | Check wiring and remove duplicate equipment. Reconfigure system. | |
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| mostat, more than one indoor unit, or more than |
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| one outdoor unit on the system. |
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18 | Minor | (Stat) The outside temperature is below the lev- | Notification only − Outdoor Temp is below the Low Balance Point. Heat Pump will not be used to | |
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| el where the heat pump is programmed to heat | service a heating demand. | |
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| the home. The system will not use the heat |
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| pump to warm your home. |
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19 | Minor | (Stat) The outside temperature is higher than | Notification only − Outdoor Temp is above the High Balance Point. Indoor Unit (furnace or air−handler) | |
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| the level where the furnace or electric heat is | will not be used to service a heating demand. | |
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| programmed to work. The system will only use |
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| the heat pump to warm your home. |
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29 | Critical | (Stat) The thermostat is reading an indoor tem- | Indoor temperature rose above 99ºF during a heating or cooling demand. Heating operation is not | |
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| perature that is higher than 99ºF. The thermo- | allowed. Check to ensure that Heating Equipment is not stuck ON (reversing valve, etc.). Check the | |
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| stat will not allow any heating operation to begin | accuracy of the thermostat temperature sensor. Select cooling system mode to cool the indoor | |
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| until it senses a temperature lower than 99ºF. | space. | |
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30 | Moderate | (Stat) The thermostat is reading an indoor tem- | Indoor Temp fell below 40ºF. Cooling operation is not allowed. Check to ensure that cooling equip- | |
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| perature that is lower than 40ºF. The thermostat | ment is not stuck ON. Check accuracy of the thermostat temperature sensor. Select heating system | |
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| will not allow any cooling operation to begin un- | mode to heat the indoor space to above 40ºF. | |
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| til it senses a temperature higher than 40ºF. |
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31 | Critical | (Stat) The thermostat has lost communication | [Indicated unit] has not communicated with thermostat for more than 3 minutes. Check connections. | |
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| with the (furnace, air−handler or outdoor unit) for | Ohm wires. If fault persists, then cycle power. Fault clears after communication is restored. | |
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| more than 3 minutes. |
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32 | Moderate | (Stat) The (furnace, air−handler or outdoor unit) | [Indicated unit] is resetting itself. This event may occur during a power outage or power fluctuation in | |
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| is resetting itself. | the system. If persistent or if it coincides with the system operation then proceed with the following | |
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| steps. Check the power connections, check the amp draw at the transformer (the transformer maybe | |
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| overloaded) and check 24VAC voltage at the DEVICE. The alarm is only cleared by pressing the | |
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| clear button on the Installer Alerts Tab. If the fault persists after checking the connections, replace | |
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| the unit’s control board. | |
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| table continued on next page | |
Page 45 | icomfort |
