Lennox EL296UHE Series Unit Information page 11

Display
No Change
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).
C Cooling stage (1 second ON, 0.5 second OFF)
1 or 2 displayed / Pause / 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.
h Heat pump stage.
E110 Low line voltage.
E111 Line voltage polarity reversed.
E112 Ground not detected.
E113 High line voltage.
E114 Line voltage frequency out-of-range.
E115 Low 24V - Control will restart if the error
recovers.
E117 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 be-
ginning on Page 11 lists diagnostic LED codes.
Diagnostic Push Button (Figure 4)
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.
TABLE 3
Integrated Control Diagnostic Modes
Action (when button released)
Remain in idle mode
Enter diagnostic recall mode
Enter flame signal mode
TABLE 4
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-robbing 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:
Page 11
Action Required to Clear and Recover
• Power is reset
• Pressing and holding push button until 3 horizontal
• lines "≡" are displayed
• 10 minutes after entering the flame sense mode.