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Lennox 100017 Manual
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Lennox 100017 Manual

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LENNOX RESIDENTIAL COMMUNICATING SYSTEMS
ALERT CODE GUIDE (V2)
Alert Codes-Troubleshooting for Communicating Thermostats, Indoor and Outdoor Units, Lennox Smart
Zoning, Equipment Interface Module and PureAir S
100017
11/2022
LENNOX SMART THERMOSTAT
BASIC COMMUNICATION SYSTEM WIRING
AND ALERT CODES
1

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  • Page 1 LENNOX RESIDENTIAL COMMUNICATING SYSTEMS ALERT CODE GUIDE (V2) Alert Codes-Troubleshooting for Communicating Thermostats, Indoor and Outdoor Units, Lennox Smart Zoning, Equipment Interface Module and PureAir S 100017 11/2022 LENNOX SMART THERMOSTAT BASIC COMMUNICATION SYSTEM WIRING AND ALERT CODES...
  • Page 2 OPTION 1 Figure 1. Lennox Communicating System Wiring Connections using Unshielded (Option 1) or Shielded Wiring (Option 2) Cabling There may be situations where alternate wirings methods may need to be employed. Two options are available to address an inductive voltage issue. If Alert Code 105 (see “Table 2.

  • Page 3: Minimizing Electrical Noise

    Figure 2. Lennox Communicating System Wiring Connections using Lennox communicating thermostats will not show a alert code for a soft disabled Separate Unshielded Cable (Option 3) control. When soft disabling occurs only the control that has been disabled will display the blinking LED status or seven-segment display indicator.
  • Page 4 • Soft disable may occur when a control has been replace. Reconfiguring the system should resolve this issue. • Sometimes Lennox communicating thermostat detects a new device or an existing device or a device on the system that is not communicating with the thermostat.

  • Page 5: A Lert C Odes

    • S30: Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all equipment. This will allow the system to auto-detect any Lennox communicating devices attached. • S40: Go to Menu > Settings > Advanced Settings > View Service Support Center >...
  • Page 6 > Code Notifications Thermostat did not find an indoor unit. Make sure there is an Lennox communicating indoor unit on the system. • Check for voltage and missing component. • Check R, i+, i- and C connections at mag-mount or subbase, smart hub and all attached communicating components.
  • Page 7 For Device • S30: Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all equipment. This will allow the system to auto-detect any Lennox communicating devices attached. • S40: Go to Menu > Settings > Advanced Settings > View Service Support Center >...
  • Page 8 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 9 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 10 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 11 • Zoning: If a zoning system has been installed and is wired directly from the thermostat to the zoning control then disconnect wiring and run control wiring from the zoning control directly to the indoor unit control. Wiring diagrams are provided in the Lennox Smart Zoning Installation and Setup Guide.
  • Page 12 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 13 • Damper control module will operate in central mode only until the proper voltage is restored or frequency distortion is resolved. • If connected to Lennox Smart Zoning, set damper control module transformer jumper to system transformer. Check for proper wiring. Replace 40VAC furnace transformer with 70VAC transformer.
  • Page 14 There is a hardware problem on a system component control. • In system using Lennox Smart Zoning zoning, the system will remain in non-zone mode (all dampers open) for five minutes after priority condition no longer exist.
  • Page 15 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 16 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 17 • Lennox has not received any complaints of no heat situations associated with this operating condition. It has been determined that occasionally the fault clears itself and the alert code is not stored in the IFC or Lennox communicating thermostat.
  • Page 18 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 19 • Check for non-functioning zone dampers. need to manually activate the zoning. NOTE: Limit trips will place the Lennox Smart Zoning zoning system into non-zone mode. NOTE: See ACC-14-01 for further details. A discharge air-temperature is high. Perform the following: ID Discharge •...
  • Page 20 • Clean face of burner assembly. The furnace limit switch has been open for more than three minutes. The system will go into Watchguard mode. In Lennox Smart Zoning zoning systems, the limit trips will place the system into central mode.
  • Page 21 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 22 • Pilot relay contacts did not close or the relay coil did not energize. Urgent ered following reset. • Replace system component (device) control. If error is applicable to Lennox variable capacity outdoor units, the outdoor control will need to be replaced.
  • Page 23 NOTE: This is only applicable when matching non-communicating heat pump with Lennox communicating indoor unit. • Lennox communicating thermostat sends a Y1 compressor demand to the indoor control requesting it to relay the demand to the outdoor unit. • The indoor unit communicating control will verify the presences of 24VAC between the Y1 and C on its terminals.
  • Page 24 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 25 • The system will not operate. • Dealer has cut the W914 jumper (Dehum, Harmony III) on the Lennox furnace control. • The thermostat monitors the DS terminal in the furnace for power and if the link has been cut then power will be lost to DS.
  • Page 26 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 27 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 28 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 29 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 30 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 31 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 32 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 33 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 34 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 35 11 minute delay during the heating mode after receiving an alert code 433, which typically occurs during start-up. > If the system is connected to the Internet, the Lennox outdoor control can be updated over the Internet. Make sure the software “auto update” is enabled. The software “auto update” can be toggled to prompt the Lennox server to update the thermostat which will update the Lennox outdoor control.
  • Page 36 • This alert code will occur if the outdoor unit power is turned off and the indoor unit power (24VAC to Lennox outdoor control) remains on, or if the indoor unit power is turned off (24VAC to Lennox outdoor control) and the outdoor unit power is on. This could occur while performing service or maintenance procedures on the indoor or outdoor unit.
  • Page 37 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 38 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 39 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 40 Strikes Lockout hour. • Outdoor unit will stop. The Lennox variable capacity unitary control (outdoor control) has incorrect appliance unit size code selected. OD MUC Unit • Check for proper configuring under unit size code used for outdoor unit (see unit configuration...
  • Page 41 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 42 • If after 10 minutes the condition does not change, the applicable alert code (542, 543, 544 or 545) is escalate by the Lennox communicating thermostat to service urgent. System will continue to operate in central mode. ZS Zone 4 Temp Service Soon •...
  • Page 43 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 44 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 45 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 46 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 47 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 48 Automatically clears when the system 80005 Service Soon Wireless Device • Move the wireless BLE device closer to the thermostat or add a Lennox Wireless Extender to detects that the issue no longer exists. Found. increase the wireless coverage area.
  • Page 49 Table 2. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...