Integrated Diagnostic Codes/Status Of Equipment; Integrated Control Diagnostic Modes; Diagnostic Led; Diagnostic Push Button - Lennox EL296UH045XE36B Unit Information

Display
No change (idle)*
Solid "E"
Solid "F"
Code Diagnostic Codes/Status of Equipment
.
Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF).
Cooling stage (1 second ON, 0.5 second OFF) 1 or 2 displayed / Pause
C
/ Repeat codes.
d Dehumidification mode (1 second ON, 1 second OFF) / Pause / Repeat
Codes).
H Gas Heat Stage (1 second ON, 0.5 second OFF) 1 or 2 displayed /
Pause / Repeat codes. Blinking during ignition.
Heat pump stage.
h
E 110 Low line voltage.
E 111 Line voltage polarity reversed.
E 112 Ground not detected
E 113 High line voltage.
E 114 Line voltage frequency out-of-range.
E 115 Low 24V - Control will restart if the error recovers.
E 117 Poor ground detected (Warning 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, error codes and other information. The table begin­
ning on Page 11 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.
TABLE 3

Integrated Control Diagnostic Modes

TABLE 4

Integrated Diagnostic Codes/Status of Equipment

Page 11
Action (when button released)
Remain in idle mode
Enter diagnostic recall mode
Enter flame signal mode
Action Required to Clear and Recover
Line Voltage Low (Voltage lower than nameplate
rating). Check power line voltage and correct. Alarm
clears 5 seconds after fault recovered.
Reverse line power voltage wiring. System resumes
normal operation 5 seconds after fault recovered.
System shuts down. Provide proper earth ground.
System resumes normal operation 5 seconds after
fault recovered.
Line Voltage High (Voltage higher than nameplate
rating). Provide power voltage within proper range.
System resumes normal operation 5 seconds after
fault recovered.
No 60 Hertz Power. Check voltage and line power
frequency. Correct voltage and frequency problems.
System resumes normal operation 5 seconds after
fault recovered.
24-Volt Power Low (Range is 18 to 30 volts). Check
and correct voltage. Check for additional power-rob­
bing equipment connected to system. May require
installation of larger VA transformer to be installed
in furnace / air handler. Clears after fault recovered.
Provide proper grounding for unit. Check for proper
earth ground to the system. Warning only will clear
30 seconds after fault recovered.
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
seven-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
lines "≡" are displayed
D 10 minutes after entering the flame sense mode.