Lennox EL23XCV Series Manual page 45

Display Display and action (normal operation)
No Change - idle (*) No Change - idle (*)
Solid .
Enter or exit field test and program mode.
Solid A
Puts unit in diagnostic mode. (Displays ambient temperatures and any active error codes.)
Solid c
Clears error history (**)
Solid E
Enter diagnostic recall mode. Displays up to 10 error codes in memory.
Solid F
Starts outdoor fan.
String P U
Enter unit code programming.
*No change indicates the display will continue to show whatever is currently being displayed for normal operations.
**Note once the error history is deleted it cannot be recovered. After the history is deleted, the unit will reset itself.
Display Display and action (normal operation)
.
Idle mode — decimal flashes at 1 Hertz > 0.5 second ON, 0.5 second OFF
Cooling operation. Shows cooling stage C1 or C2 operating if non-communicating. Shows cooling capacity percentage i.e. C 7 0
C
operating if installed with a S30 communicating thermostat. Example: C 2 0 pause A 7 5
E in the display string represents the active error code(s) in the outdoor unit.
E
Example: C 5 0 pause E 4 4 pause E 4 4 2 pause A 7 5 pause
A in the display string represents the outdoor ambient temperature in °F at the outdoor sensor on the outdoor unit.
A
Example: C 5 0 pause A 7 5
When unit is in the charge mode, Suction pressure (SPxxx), Suction Temp (Stxx.x), Superheat (SHxx.x), Liquid pressure (LPxxx),
Liquid Temp (Ltxx.x) and subcooling (SCxx.x) will be scrolled on the 7-segement display.
Scrolling
Example: S P 1 3 5 pause S t 6 2 pause S H 1 5 pause L P 3 4 5 pause L t 9 6 pause S C 1 0 Repeat
TYPICAL 7-SEGMENT ACTIVE COOLING DEMAND DISPLAY STRING
C 2
SECOND STAGE
COOLING DEMAND
TABLE 9. Field Test, Diagnostic Recall and Program Menu Options
E 4 4 2
ACTIVE ERROR
CODE (IF PRESENT)
BY DEFAULT, COOLING DEMAND, ACTIVE ERROR CODES
AND OUTDOOR AMBIENT TEMPERATURE ARE DISPLAYED.
FIGURE 19. Typical 7-Segment Demand Display String
A 7 7
OUTDOOR AMBIENT
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AIR TEMP