Lennox EL23XCV Series Manual page 42

Description
Idle Mode: Decimal point flashes at 1 Hz.
Soft Disable Mode: Top and bottom horizontal line and decimal point flash at 1 Hz.
If indoor or outdoor control displays Soft Disable code:
1) Confirm proper wiring between all devices (thermostat, indoor and outdoor).
2) Cycle power to the control that is displaying the Soft Disable code.
3) Put the room thermostat through Setup.
4) Go to Setup/System Devices/Thermostat/Edit/push Reset.
5) Go to Setup/System Devices/Thermostat/Edit/push Reset All.
If the room thermostat detects a new device or a device that is not communicating,
it sends a Soft Disable. When this occurs, Alarm 10 is activated and the room
thermostat sends a Soft Disable command to the offending device on the bus
(outdoor control, IFC, AHC, EIM or Damper Control Module).
O.E.M. Test Mode
Anti-Short-Cycle Delay
Cooling Capacity: Shows cooling stage C1 or C2 operating if non-communicating.
Shows cooling capacity percentage i.e. C70 operating if installed with a S30
communicating thermostat. Example to the right indicates a cooling demand of 50
percent.
Diagnostic recall: Shows the last 10 stored diagnostic error codes.
Fault memory clears
Active error in outdoor control Idle mode: Show all active error(s) codes.
Active error in run mode: Show current status and all active error(s) codes.
Outdoor Ambient Temperature (OAT): Any time OAT is within operating range,
value is displayed if unit is in diagnostic and non-diagnostic modes.
Liquid Line Temperature (LIQ): Any time LIQ is sensed in operating range, value
is displayed if unit is in diagnostic mode or manually enabled for non-diagnostic
modes.
Charge Mode: 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-segment display
TABLE 8. Outdoor Control 7-Segment Unit Status Displays
Example of Display
Idle Mode: Decimal point flashes at 1 Hz (0.5 second on, 0.5 second off).
Display OFF.
Soft Disable Mode: Top and bottom horizontal line and decimal point flash at 1 Hz
(0.5 second on, 0.5 second off).
The control in Soft Disable Mode is indicated by the following:
• On AHC, IFC and outdoor controls, Soft Disable Mode is indicated by flashing
double horizontal lines on the 7-segment display.
• On the Damper Control Module and EIM, the green LED will blink 3 seconds on
and 1 second off.
All segments flashing at 2 Hz (unless error is detected). NOTE - Control should be
replaced.
The middle line flashes at 1 Hz for 2 seconds, followed by a 2-second display
of the number of minutes left on the timer (value is rounded up: 2 min. 1 sec. is
displayed as 3). If activated, the anti-short cycle delay time remaining is displayed
(default is 300 sec./5 min.).
Cooling compressor capacity (1second on, 0.5 second off) followed by ambient
temperature.
Non-Communicating thermostat with second stage cooling active and ambient of
95F : C 2 pause A 9 5 repeat.
S30 communicating thermostat with 70% demand and ambinet of 95F: C 7 0 pause
A 9 5 Repeat
C 5 0 pause A 7 6
If first error is E 2 5 0, second E 2 3 1 pause E 2 5 0 pause
E 2 3 1
Next codes (up to 10) are shown using same method.
If there are no error codes stored:
After the fault memory is cleared, the following string flashes every 0.5 seconds:
0 0 0 0 pause
Following display string is repeated if Error E 125 and E 201 are present:
E 1 2 5 pause E 2 0 1
Following display string is repeated if Error E 440 is present while cooling demand
is 80 percent:
C 8 0 pause E 4 4 0
Following display string is repeated if cooling is active and OAT is 104°F:
C 3 5 pause A 1 0 4 pause
Following display string is repeated if cooling is active and LIQ is 105°F:
C 3 1 pause L 1 0 5 pause
The following string is repeated:
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
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E pause 0 0 0
.