Brand: Allied Air Enterprises
Category: Furnace
Manual Type:
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Manual for A97US2V with 107046-XX Control
Uploaded: April 1, 2025, 12:48 a.m.
Warranty Summary
Warranty information is not explicitly provided in this installation manual.
This furnace is equipped with an automatic hot surface ignition system. When the thermostat calls for heat, the combustion air inducer starts, followed by a pre-purge and ignitor warm-up. The gas valve opens, gas is ignited, and the flame sensor proves the flame. The blower motor then starts after a delay to circulate warm air. The heating process continues until the thermostat is satisfied.
Troubleshooting and error codes
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Diagnostic Codes/Status of Equipment
| Code | Diagnostic Codes/Status of Equipment | Action Required to Clear and Recover |
|---|---|---|
| E000 | No errors in memory. | N/A |
| E105 | Device communication problem - No other devices on RS BUS (Communicating systems only) | Equipment is unable to communicate indicates numerous message errors. In most cases errors are related to electrical noise. Make sure high voltage power is separated from RSBus. Check for mis-wired and/or loose connections between the stat, indoor unit and outdoor unit. Check for a high voltage source of noise close to the system. Fault clears after communication is restored. |
| E110 | Low line voltage | Line Voltage low (Voltage tower than nameplate rating). Check power line voltage and correct. Alarm clears 5 seconds after fault recovered. |
| E111 | Line voltage polarity reversed | Reverse line power voltage wiring. System resumes normal operation 5 seconds after fault recovered. |
| E112 | Ground not detected | System shuts down. Provide proper earth ground. System resumes normal operation 5 seconds after fault recovered. |
| E113 | High line voltage | Line Voltage high (Voltage higher than nameplate rating). Provide power voltage within proper range. System resumes normal operation 5 seconds after fault recovered. |
| E114 | Line voltage frequency out-of-range. | No 60 Hertz power. Check voltage and line power frequency. Correct voltage and frequency problems. System resumes normal operation 5 seconds after fault recovered. |
| E115 | Low 24V | 24 Volt Power high (Range is 18 to 30 Volts). Check and correct voltage. Check for additional power robbing equipment connected to system. May require installation of larger VA transformer to be installed in furnace/air handler. Clears after fault recovered. |
| E117 | Poor ground detected (Warning only) | Provide proper grounding for unit. Check for proper earth ground to the system. Warming only will clear 30 seconds after fault recovered |
| E120 | Unresponsive device (Communicating systems only) | Usually caused by delay in outdoor unit responding to indoor unit poling. Recycle power. Check all wiring connections. Cleared after unresponsive device responds to any inquiry |
| E124 | Active communicating thermostat signal missing for more than 3 minutes (Communicating systems only). | Equipment lost communication with the thermostat. Check four wiring connections, ohm wires, and cycle power at the thermostat. Alert stops all services and waits for heartbeat message from thermostat (subnet controller). Cleared after valid thermostat (subnet) message is received. |
| E125 | Control failed self-check, internal error, failed hardware. Will restart if error recovers, Integrated control not communicating Covers hardware errors (flame sense circuit faults, pin shorts, etc) | Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Cleared 300 seconds after fault recovered. |
| E131 | Corrupted control parameters (Verify configuration of system) (Communicating systems only). | Reconfigure the system. Replace control if heating or cooling is not available. Only applicable in the communicating mode not in startup. Exit from Commissioning and Execute Se+ factory Default mode. Control will still operate on default parameter settings. |
| E180 | Outdoor air temperature sensor failure. Only shown if shorted or out of range (Communicating systems only) | Compare outdoor sensor resistance to temperature resistance charts in unit installation instructions. Replace sensor pack if necessary. At beginning of (any) configuration, furnace or air handler control will sense outdoor air and discharge air temperature sensor(s) If detected (reading in range), appropriate feature will be set as installed and that could be seen in 'About ' screen. In normal operation after control recognizes sensors, alarm will be sent if valid temperature reading is lost. To get rid of setting and alarm, redo configuration and make sure that temperature sensor is marked as not installed in indoor Unit 'About' screen. When indoor unit control is replaced thermostat will 'tell' new control if temperature sensor is in system or not. Clears 30 seconds after fault recovered. |
| E200 | Hard Lock out - Rollout circuit open or previously open | Correct cause of rollout trip or replace flame rollout switch. Test furnace operation. Cleared after fault recovered. |
| E201 | Indoor blower/communication failure - Unable to communicate with blower motor | Indoor blower communication failure including power outage. Lost communication with indoor blower motor. Possible causes: motor not powered, loose wiring. Problem may be on control or motor side. Cleared after fault recovered. |
| E202 | Indoor blower motor mis-match - indoor motor horsepower does not match unit capacity | Incorrect appliance capacity code selected. Check for proper configuring under Unit Size Code for Furnace/Air Hander on configuration guide or in installation instructions. Cleared after the correct match is detected following a reset. (Remove thermostat from system while applying power and reprogramming) |
| E203 | Appliance capacity size is NOT programmed. Invalid unit codes. Refer to configuration flow chart. | No appliance capacity code selected. Check for proper configuring under Unit Size Codes for Furnace on configuration guide or in installation instruction. Critical Alert Cleared after valid unit code is read following a reset (remove thermostat from system while applying power and reprogramming) |
| E204 | Gas valve mis-wired | Check gas valve operation and wiring. Clears when repaired |
| E205 | Gas valve control relay contact shorted | Check wiring on control and gas valve. If wiring is correct replace control. |
| E207 | Hot surface igniter sensed open - Refer to troubleshooting | Measure resistance of hot surface igniter. Replace if open or not within specified range found in 10M. Resumes normal operation after fault is cleared. |
| E223 | Low pressure switch failed open | Check pressure(inches W.C) of low pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Resumes normal operation after fault is cleared. |
| E224 | Low pressure switch failed closed -Refer to troubleshooting | Check pressure(inches W.C) of low pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Resumes normal operation after fault is cleared. |
| E225 | High pressure switch failed open -Refer to troubleshooting | Check pressure(inches W.C) of high pressure switch closing on heat call. Measure operating pressure (inches w.c. Inspect vent and combustion air inducer for correct operation and restriction Resumes normal operation after fault is cleared. |
| E226 | High pressure switch failed closed -Refer to troubleshooting | Check operation of high pressure closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restrictio. Resumes normal operation after fault is cleared. |
Troubleshooting and error codes
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Diagnostic Codes/Status of Equipment
| Code | Diagnostic Codes/Status of Equipment | Action Required to Clear and Recover |
|---|---|---|
| E000 | No errors in memory. | N/A |
| E105 | Device communication problem - No other devices on RS BUS (Communicating systems only) | Equipment is unable to communicate indicates numerous message errors. In most cases errors are related to electrical noise. Make sure high voltage power is separated from RSBus. Check for mis-wired and/or loose connections between the stat, indoor unit and outdoor unit. Check for a high voltage source of noise close to the system. Fault clears after communication is restored. |
| E110 | Low line voltage | Line Voltage low (Voltage tower than nameplate rating). Check power line voltage and correct. Alarm clears 5 seconds after fault recovered. |
| E111 | Line voltage polarity reversed | Reverse line power voltage wiring. System resumes normal operation 5 seconds after fault recovered. |
| E112 | Ground not detected | System shuts down. Provide proper earth ground. System resumes normal operation 5 seconds after fault recovered. |
| E113 | High line voltage | Line Voltage high (Voltage higher than nameplate rating). Provide power voltage within proper range. System resumes normal operation 5 seconds after fault recovered. |
| E114 | Line voltage frequency out-of-range. | No 60 Hertz power. Check voltage and line power frequency. Correct voltage and frequency problems. System resumes normal operation 5 seconds after fault recovered. |
| E115 | Low 24V | 24 Volt Power high (Range is 18 to 30 Volts). Check and correct voltage. Check for additional power robbing equipment connected to system. May require installation of larger VA transformer to be installed in furnace/air handler. Clears after fault recovered. |
| E117 | Poor ground detected (Warning only) | Provide proper grounding for unit. Check for proper earth ground to the system. Warming only will clear 30 seconds after fault recovered |
| E120 | Unresponsive device (Communicating systems only) | Usually caused by delay in outdoor unit responding to indoor unit poling. Recycle power. Check all wiring connections. Cleared after unresponsive device responds to any inquiry |
| E124 | Active communicating thermostat signal missing for more than 3 minutes (Communicating systems only). | Equipment lost communication with the thermostat. Check four wiring connections, ohm wires, and cycle power at the thermostat. Alert stops all services and waits for heartbeat message from thermostat (subnet controller). Cleared after valid thermostat (subnet) message is received. |
| E125 | Control failed self-check, internal error, failed hardware. Will restart if error recovers, Integrated control not communicating Covers hardware errors (flame sense circuit faults, pin shorts, etc) | Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Cleared 300 seconds after fault recovered. |
| E131 | Corrupted control parameters (Verify configuration of system) (Communicating systems only). | Reconfigure the system. Replace control if heating or cooling is not available. Only applicable in the communicating mode not in startup. Exit from Commissioning and Execute Se+ factory Default mode. Control will still operate on default parameter settings. |
| E180 | Outdoor air temperature sensor failure. Only shown if shorted or out of range (Communicating systems only) | Compare outdoor sensor resistance to temperature resistance charts in unit installation instructions. Replace sensor pack if necessary. At beginning of (any) configuration, furnace or air handler control will sense outdoor air and discharge air temperature sensor(s) If detected (reading in range), appropriate feature will be set as installed and that could be seen in 'About ' screen. In normal operation after control recognizes sensors, alarm will be sent if valid temperature reading is lost. To get rid of setting and alarm, redo configuration and make sure that temperature sensor is marked as not installed in indoor Unit 'About' screen. When indoor unit control is replaced thermostat will 'tell' new control if temperature sensor is in system or not. Clears 30 seconds after fault recovered. |
| E200 | Hard Lock out - Rollout circuit open or previously open | Correct cause of rollout trip or replace flame rollout switch. Test furnace operation. Cleared after fault recovered. |
| E201 | Indoor blower/communication failure - Unable to communicate with blower motor | Indoor blower communication failure including power outage. Lost communication with indoor blower motor. Possible causes: motor not powered, loose wiring. Problem may be on control or motor side. Cleared after fault recovered. |
| E202 | Indoor blower motor mis-match - indoor motor horsepower does not match unit capacity | Incorrect appliance capacity code selected. Check for proper configuring under Unit Size Code for Furnace/Air Hander on configuration guide or in installation instructions. Cleared after the correct match is detected following a reset. (Remove thermostat from system while applying power and reprogramming) |
| E203 | Appliance capacity size is NOT programmed. Invalid unit codes. Refer to configuration flow chart. | No appliance capacity code selected. Check for proper configuring under Unit Size Codes for Furnace on configuration guide or in installation instruction. Critical Alert Cleared after valid unit code is read following a reset (remove thermostat from system while applying power and reprogramming) |
| E204 | Gas valve mis-wired | Check gas valve operation and wiring. Clears when repaired |
| E205 | Gas valve control relay contact shorted | Check wiring on control and gas valve. If wiring is correct replace control. |
| E207 | Hot surface igniter sensed open - Refer to troubleshooting | Measure resistance of hot surface igniter. Replace if open or not within specified range found in 10M. Resumes normal operation after fault is cleared. |
| E223 | Low pressure switch failed open | Check pressure(inches W.C) of low pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Resumes normal operation after fault is cleared. |
| E224 | Low pressure switch failed closed -Refer to troubleshooting | Check pressure(inches W.C) of low pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Resumes normal operation after fault is cleared. |
| E225 | High pressure switch failed open -Refer to troubleshooting | Check pressure(inches W.C) of high pressure switch closing on heat call. Measure operating pressure (inches w.c. Inspect vent and combustion air inducer for correct operation and restriction Resumes normal operation after fault is cleared. |
| E226 | High pressure switch failed closed -Refer to troubleshooting | Check operation of high pressure closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restrictio. Resumes normal operation after fault is cleared. |