Outdoor Control Operation - Lennox EL23XCV Series Manual

Outdoor Control Operation, Checkout and Status / Error Codes
OPERATION:
The outdoor control is a microprocessor-based device for use with variable-capacity compressors up to 5-tons in capacity
operating on 24VAC residential power. The outdoor control integrates the functionality of maintaining compressor speed,
and outdoor fan control of PSC and ECM motors. The outdoor control is self-configuring. During start-up the outdoor con-
trol selects one of two configurations variable-capacity air conditioner or variable-capacity heat pump.
The EL23XCV outdoor control provides application flexibility. The EL23XCV may be installed with an S30/S40 communi-
cating thermostat in a fully communicating system or with a conventional 24VAC non-communicating single or two stage
cooling thermostat.
RAST TERMINALS FOR
THERMOSTAT WIRING
CONNECTION
STATUS CODES:
TABLE 15. Outdoor Control 7-Segment Display Alert Codes - Outdoor Control Status
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi-
cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are
displayed. Alert codes are also displayed on the S30/S40 thermostat.
Alert Codes Priority
E 600 Critical
E 601 Critical
FIGURE 43. Outdoor Control Unit
Alarm Description
Compressor has Load shedding function: Provides a method for a local utility company to limit the maximum
been cycled OFF on power level usage of the outdoor unit. The feature is activated by applying 24 volts AC
utility load shedding power to the L and C terminals on the outdoor control.
Low temperature Protection: Outdoor unit will not operate when the outdoor temperature
Outdoor unit has
is at or below 4° F (20°C). If the unit is operating and the outdoor temperature drops
been cycled OFF
below 4°F (20°C), the unit will continue to operate until the room thermostat is satisfied
on low temperature
or the outdoor temperature drops to 15°F (26°C). (Outdoor unit ambient sensor provides
protection.
temperature readings.)
PUSH BUTTON
Possible Causes and Clearing Alarm
Page 67
7 SEGMENT
DISPLAY
CHARGE
MODE JUMPER
(CHRG MODE)
CHARGE MODE AND
OPERATION MODE
JUMPER DETAIL
OPERATION
MODE
JUMPER