Lennox iComfort SL280UH070V36A Manual page 9

Display
No change (idle)*
Solid "E"
Solid "D"
Solid "F"
Solid "P" (variable speed only)
* No change implies the display will continue to show whatever is currently being displayed for normal operation (blinking
decimal, active error code, heat state, etc..)
Diagnostic LED (Figure 4)
The seven-segment diagnostic LED displays operating
status, target airflow, error codes and other information.
The table beginning on Page 10 lists diagnostic LED
codes.
Diagnostic Push Button (Figure 4)
The diagnostic push button is located adjacent to the
seven-segment diagnostic LED. This button is used to en­
able the Error Code Recall "E" mode and the Flame Signal
"F" mode. Press the button and hold it to cycle through a
menu of options. Every five seconds a new menu item will
be displayed. When the button is released, the displayed
item will be selected. Once all items in the menu have been
displayed, the menu resumes from the beginning until the
button is released.
Error Code Recall Mode
Select "E" from the menu to access the most recent 10 error
codes. Select "c" from the Error Code Recall menu to clear
all error codes. Button must be pressed a second time
while "c" is flashing to confirm command to delete codes.
Press the button until a solid "≡" is displayed to exit the Error
Code Recall mode.
TABLE 4
Integrated Control Diagnostic Modes
Action (when button released)
Remain in idle mode
Enter diagnostic recall mode
Discharge Air Installed
Enter flame signal mode
Program unit capacity/size (Unit Code)
Flame Signal Mode
Select "F" from the menu to access the flame signal mode.
The integrated control will display the flame current on 7
segment LED in in micro amps (uA).
Flame signal mode is exited after any of the following:
D Power is reset
D Pressing and holding push button until 3 horizontal
D 10 minutes after entering the flame sense mode.
Program Unit Capacity/Size Mode
After the "P" is selected (by releasing the push button) the
integrated control will start flashing the "P" on display for 90
seconds. If push button is pressed again and held during
that time, the control will start to display characters corre­
sponding to different variable speed furnace models for 3
seconds each. While the wanted character-model is dis­
played push button has to be released. Selected option will
flash display for 10 seconds and during that time push but­
ton has to be pressed and held for 5 seconds. Once control
accepts new setting it will store data in non-volatile memory
and reset itself. If 10 seconds expires or push button is held
less than 5 seconds, control will exit field test mode and go
into idle without changing programming the unit size.
Page 9
lines "≡" are displayed