Lennox S40 Installation And Setup Guide

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Soft Disable
Soft disabling is when the Lennox communicating thermostat nds an unknown
control on the communication bus. The thermostat sends the unknown control
a message to go into soft disable mode until the component is properly
congured or removed.
Sometimes soft disable will occur when a control is being replaced.
Reconguring the system should resolve this issue.
The Lennox communicating thermostat will not show a alert code for a soft
disabled control. When soft disabling occurs only the control that has been
disabled will display the blinking LED status or seven-segment display indicator.
Refer to the device’s installation and setup guide for further guidance.
The thermostat control with the soft disable state will indicate so as follows:
• On air handler, integrated furnace and outdoor controls, the soft disable state
is display by double horizontal lines on seven segment display.
• On Lennox damper control module and EIM the green LED will blink 3
seconds on and 1 second off.
Possible Cause
• Soft disable may occur when a control has been replaced. Reconguring 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. If this occurs, an alert code 10 is activated and the thermostat
sends a soft disable command to the offending device on the communication
bus (outdoor control, IFC, AHC, EIM, or damper control module).
Re-Congure System
Use the following procedure if any controls are displaying the soft disable
indicator:
1. Conrm proper wiring between all devices such as thermostat and
thermostat.
2. Cycle power.
3. Go to the Menu > Settings > Advanced Settings > View Support
Service Control Center.
4. Select Equipment Settings.
5. Select Reset.
6. Select Re-Congure System.
NOTE: Running the re-conguration utility will not affect settings for non-
communicating equipment already congured and other custom
settings.
7. Select Yes to continue.
8. The thermostat will reboot and start through the system commissioning
procedure.
Service Notication Alert Codes
The following are service notication alert codes.
Table 20. Service Alert Notication Codes
Service Alert Code Function
3000 Filter 1
3001 Filter 2
3002 Humidier pad
3003 UV Light
3004 Maintenance
3005 PureAir Maintenance

Lennox S40 Specifications

General

Brand	Lennox
Model	S40
Category	Thermostat
Language	English