Integrated Control Diagnostic Codes - Lennox SL280UH090V36B Installation Instructions Manual

Integrated Control Diagnostic Modes
Display
No change (idle)*
Solid "E"
Solid "D"
Solid "F"
Solid "F" (variable speed only)
Two horizontal lines
* 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 33)
The seven-segment diagnostic LED displays operating
status, target airflow, error codes and other information.
The table beginning on the next page lists diagnostic LED
codes.
Diagnostic Push Button (Figure 33)
The diagnostic push button is located adjacent to the sev-
en-segment diagnostic LED. This button is used to enable
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.
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:
• Power is reset
• Pressing and holding push button until 3 horizontal
lines "≡" are displayed
• 10 minutes after entering the flame sense mode.
Action (when button is released)
Remain in idle mode
Enter diagnostic recall mode
Discharge Air Installed
Enter flame signal mode
Program unit capacity size (Unit Code)
soft disable
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
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 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.
Soft Disable
Soft disabling is when thermostat finds a device on the
BUS that it does not recognize and the thermostat sends
a the device a message to be in soft disabling mode until
properly configured. Two horizontal bars will display.
Steps to follow if the damper control module is displaying
the soft disable code.
1 - Confirm proper
(thermostat, damper control module, indoor and
outdoor).
2 - Cycle power to the control that is displaying the soft
disable code.
3 - Put the room thermostat through set up.
4 - Go to setup / system devices / thermostat / edit /
then push reset.
5 - Go to setup / system devices / thermostat / edit /
then push resetAll.
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wiring between all devices