Outdoor Control Operation, Checkout And Status / Error Codes - Lennox XC25-024-230-01 Installation And Service Procedure

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,
demand, defrost and fan PWM controls. The outdoor control is self-configuring. During start-up the outdoor control selects
one of two configurations ­ variable-capacity air conditioner or variable-capacity heat pump.
NOTE - The green LED located on the outdoor control flashes when
communication occurs between the outdoor control and either the
thermostat or the inverter.
STATUS CODES:
Table 13. 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/dehumidification).
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 iComfort Wi-Fi
Alert Codes Priority
E 600 Critical
E 601 Critical
XC25
Figure 49. Outdoor Control Unit
®
thermostat.
Alarm Description
Compressor has Load shedding function: Provides a method for a local utility company to limit the maximum power
been cycled OFF on level usage of the outdoor unit. The feature is activated by applying 24 volts AC power to the L and C
utility load shedding. terminals on the outdoor control.
Outdoor unit has Low temperature Protection: Outdoor unit will not operate when the outdoor temperature is at or
been cycled OFF on below ­4°F (­20°C). If the unit is operating and the outdoor temperature drops below ­4°F (­20°C),
low temperature the unit will continue to operate until the room thermostat is satisfied or the outdoor temperature
protection.
drops to ­15°F (­26°C). (Outdoor unit ambient sensor provides temperature readings.)
PUMP DOWN - WHEN UNIT IS IN PUMP DOWN MODE, Pd WILL BE
DISPLAYED ON 7-SEGMENT.
TO ACTIVATE PUMP DOWN MODE, REFER TO PUMP DOWN
CYCLE SEQUENCE ON PAGE 36.
Possible Causes and Clearing Alarm
62
7-SEGMENT
DISPLAY
PUSH
BUTTON