Integrated Control Diagnostic Codes - Lennox SL280DFV Installation Instructions Manual

Integrated Control Diagnostic Modes
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..)
** 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 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 E" is displayed, the control enters the Diagnostic Recall (Alarm History). Diagnostic Recall mode menu
options: No change (displaying error history) remains in Diagnostic Recall mode; solid = " exits Diagnostic Recall mode;
and solid c" clears the error history. Must press button while flashing c" is displayed to clear error codes.
When the solid F" is displayed, the control enters the Flame Signal Mode. The Flame Signal Mode is exited: with power
cycle/reset, by pressing and holding the push button until 3 horizontal line are displayed = , after 10 minutes of entering
flame signal mode.
Code Diagnostic Codes/Status of Equipment
.
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
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)**
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Action Required to Clear and Recover