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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113 | Critical | (Furnace) The line voltage is too high. | Line voltage high (voltage higher than nameplate rating). Provide power voltage within proper range. | |
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| System resumes normal operation 5 seconds after fault recovered. | |
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114 | Critical | (Furnace / Air Handler) There is a frequency/ | This alarm/code may indicate transformer overloading. Check the voltage and line power frequency. | |
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| distortion problem with the power to the (furnace | Check the generator operating frequency, if the system is running on back−up power. Correct voltage | |
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| or air−handler). | and frequency problems. System resumes normal operation 5 seconds after fault recovered. | |
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115 | Critical | (Furnace / Air Handler) The 24VAC to the (fur- | 24−Volt Power Low (Range is 18 to 30 volts). Check and correct voltage. Check for additional power− | |
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| nace or air−handler control board) is lower than | robbing equipment connected to system. This alarm/code may require the installation of an addition- | |
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| the required range of 18 to 30VAC. | al or larger VA transformer. | |
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117 | Minor | (Furnace) The reporting unit has poor earth | Provide proper grounding for the unit. Check for proper earth ground to the system. The alarm/code | |
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| grounding. | will clear 30 seconds after it is corrected. | |
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120 | Moderate | (Stat / Furnace / Air Handler / Outdoor Unit) | Typically, this alarm/code does not cause any issues and will clear on its own. The alarm/code is | |
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| There is a delay in the (stat, furnace, air−handler | usually caused by a delay in the outdoor unit responding to the thermostat. Check all wiring connec- | |
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| or outdoor unit) responding to the system. | tions. Cleared after unresponsive device responds to any inquiry. | |
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124 | Critical | (Stat / Furnace / Air Handler / Outdoor Unit) The | Equipment lost communication with the thermostat. Check the wiring connections, ohm wires and | |
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| thermostat has lost communication with the (fur- | cycle power. The alarm stops all associated HVAC operations and waits for a heartbeat message | |
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| nace, air−handler or outdoor unit) for more than | from the unit that’s not communicating. The alarm/fault clears after communication is re−established. | |
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| 3 minutes. |
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125 | Critical | (Stat / Furnace / Outdoor Unit) There is a hard- | There is a control hardware problem. Replace the control if the problem prevents operation and is | |
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| ware problem on either the (stat, furnace control | persistent. The alarm/fault is cleared 300 seconds after the fault recovers. | |
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| board, air−handler control board or outdoor unit |
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| control board). |
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126 | Critical | (Furnace / Outdoor Unit) There is an internal | There is an internal hardware problem on the control. Typically the control will re−set itself. Replace | |
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| communication problem with the (furnace con- | the control if the problem prevents operation and is persistent. The alarm/fault is cleared 300 sec- | |
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| trol board, air−handler control board or outdoor | onds after the fault recovers. | |
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| unit control board). |
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130 | Moderate | (Air Handler) An air−handler configuration jump- | Configuration jumper(s) missing on control (applicable in non−communicating applications only). | |
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| er is missing. | Replace the jumper or put wire between terminals on control. Cleared after jumper is connected. | |
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131 | Critical | (Stat / Furnace / Air Handler / Outdoor Unit) The | Reconfigure the system. Replace the control if heating or cooling is not available. | |
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| (stat, furnace, air−handler or outdoor unit) con- |
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| trol parameters are corrupted. |
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132 | Critical | (Air Handler) The air handler control software is | Recycle power. If failure re−occurs, replace the control. System reset is required to recover. | |
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| corrupted. |
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| table continued on next page |
Page 47 | icomfort |