Lennox International Inc SL280DFV installation instructions Integrated Control Diagnostic Modes

Integrated Control Diagnostic Modes

Display	Action (when button released)
No change (idle)*	Remain in idle mode
Solid	Enter diagnostic recall mode
Solid	Discharge Air Installed
Solid	Enter flame signal mode
Solid	Program unit capacity/size (Unit Code)**

*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..)

** After the art flashing the 0

seconds. If push button is pressed again and held during that time, the control will start to display characters corresponding

to different variable speed furnace models for 3 seconds each. While the wanted character−model is displayed push button has to be released. Selected option will flash display for 10 seconds and during that time push button 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 sec-

onds expires or push button is held less than 5 seconds, control will exit filed test mode and go in idle without programming

the unit size.

Integrated Control Diagnostic Codes

Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be

displayed. Release the button when the desired mode is displayed.
When a solid "P" is displayed, the furnace capacity / size is programmed.
When the solid
options: No change (displaying error history) remains in Diagnostic Recall mode; solid			" exits Diagnostic Recall mode;
and solid . Must press button while flashing
When the solid
cycle/reset, by pressing and holding the push button until 3 horizontal line are displayed				ter 10 minutes of entering
flame signal mode.
Code	Diagnostic Codes/Status of Equipment	Action Required to Clear and Recover
.	Idle mode (Decimal blinks at 1 Hertz −− 0.5 second ON, 0.5 second OFF).
A	Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5
	second OFF) / cfm setting for current mode displayed.
C	Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause
	/ cfm setting displayed / Pause / Repeat codes).
d	Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting dis-
	played / Pause / Repeat Codes).
h	Heat pump stage (1 second ON, 0.5 second OFF) / % of input rate dis-
	played / Pause / cfm setting / Pause / Repeat codes.
H	Gas Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed /
	Pause / cfm
	setting displayed / Pause / Repeat codes. Blinking during ignition.
dF	Defrost mode.
U	Discharge Air Temperature

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