Outdoor Control Operation, Checkout And Status / Error Codes - Lennox XP25-024-230-01 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 ON THE OUTDOOR CONTROL FLASHES
WHEN COMMUNICATION OCCURS BETWEEN THE OUTDOOR
CONTROL AND EITHER THE THERMOSTAT OR THE INVERTER.
STATUS CODES:
Table 16. 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
Priority
Codes
Compressor has been cycled OFF
E 600 Critical
on utility load shedding.
Outdoor unit has been cycled OFF
E 601 Critical
on low temperature protection.
COMMUNICATION PLUG BETWEEN OUTDOOR
CONTROL AND INVERTER CONTROL
AMBIENT, COIL AND LIQUID
LINE SENSOR PLUG
Figure 57. Outdoor Control Operation
®
thermostat.
Alarm Description
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 39.
Possible Causes and Clearing Alarm
Load shedding function: Provides a method for a local utility company to limit the maxim­
um power level usage of the outdoor unit.
Low temperature protection: Outdoor unit will not operate when the outdoor temperat­
ure 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 continues to operate until the room thermostat is sat­
isfied or the outdoor temperature drops to ­15°F (­26°C). Outdoor unit ambient sensor
provides temperature readings.
Page 75
7-SEGMENT
PUSH
DISPLAY
BUTTON
XP25