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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-conguring. During start-up the outdoor con-
trol selects one of two congurations variable-capacity air conditioner or variable-capacity heat pump.
The EL23XCV outdoor control provides application exibility. 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
CHARGE MODE AND
OPERATION MODE
JUMPER DETAIL
PUSH BUTTON
7 SEGMENT
DISPLAY
OPERATION
MODE
JUMPER
CHARGE
MODE JUMPER
(CHRG MODE)
FIGURE 43. Outdoor Control Unit
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/dehumidi-
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 Alarm Description Possible Causes and Clearing Alarm
E 600 Critical
Compressor has
been cycled OFF on
utility load shedding
Load shedding function: Provides a method for a local utility company to limit the maximum
power level usage of the outdoor unit. The feature is activated by applying 24 volts AC
power to the L and C terminals on the outdoor control.
E 601 Critical
Outdoor unit has
been cycled OFF
on low temperature
protection.
Low temperature Protection: Outdoor unit will not operate when the outdoor temperature
is at or below 4° F (20°C). If the unit is operating and the outdoor temperature drops
below 4°F (20°C), the unit will continue to operate until the room thermostat is satised
or the outdoor temperature drops to 15°F (26°C). (Outdoor unit ambient sensor provides
temperature readings.)
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