System Operation And Service; 7-Segment Alert And System Status Codes; Resetting Alert Codes; Outdoor Control 7-Segment Display Alert Codes And Inverter Led Flash Codes - Lennox XP25-024-230-01 Installation And Service Procedure

7-Segment Alert and System Status Codes

Alert codes are displayed using the 7-segment display
located on the outdoor control.
NOTE - System fault and lockout codes take precedence
over system status codes (cooling, heating operating
percentages or defrost/dehumidification).
The 7-segment display shows an abnormal condition (error
code) when detected in the system. A list of the codes are
shown in table 6.

RESETTING ALERT CODES

Alert codes can be reset manually or automatically:
1. Manual Reset
Use one fo the following methods to manually reset the
system:
Table 6. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
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
Inverter LED Flash
Code (number of
Alert Inverter
flashes)
Code
Codes
Red LED
N/A N/A ON
N/A N/A ON
N/A N/A OFF
E 105 N/A N/A
E 120 N/A N/A
E 124 N/A N/A
E 125 N/A N/A
E 131 N/A N/A
E 132 N/A N/A
E 180 N/A N/A
III. SYSTEM OPERATION AND SERVICE
®
thermostat.
Priority
Green LED
OFF N/A XC/XP 25-024 and -036 only: Indicates inverter is operating normally.
ON N/A XC/XP 25-048 and -060 only: Indicates inverter is operating normally.
OFF N/A Indicates inverter is NOT energized.
The outdoor control has
lost communication with
N/A Moderate
either the thermostat or in­
door unit.
There is a delay in the out­
door unit responding to the
N/A Moderate
system.
The iComfort Wi­Fi
mostat has lost communic­
N/A Critical
ation with the outdoor unit
for more than 3 minutes.
There is a hardware prob­
lem with the outdoor con­
N/A Critical
trol.
The outdoor unit control
N/A Critical
parameters are corrupted.
N/A Critical Internal software error.
The outdoor unit ambient
temperature sensor has
malfunctioned. As a result
N/A Critical
the outdoor unit control will
not perform low ambient
cooling.
•
Disconnecting R wire from the outdoor control R
terminal.
•
Turning the indoor unit off and back on again
After power up, all currently displayed codes are
cleared.
2. Automatic Reset
After an alert is detected, the outdoor control continues
to monitor the system and compressor operations.
When/if conditions return to normal, the alert code turns
off automatically.
NOTE - Error codes can be recalled by following information
in tables on page 34.
Alarm Description
Equipment is unable to communicate. Indicates nu­
merous message errors. In most cases errors are re­
lated to electrical noise. Make sure high voltage power
is separated from RSBus. Check for mis­wired and/or
loose connections between the stat, indoor unit and
outdoor unit. Check for a high voltage source of noise
close to the system. Fault clears after communication
is restored.
Typically, this alarm/code does not cause any issues
and clears on its own. The alarm/code is usually
caused by a delay in the outdoor unit responding to the
thermostat. Check all wiring connections. Cleared
after unresponsive device responds to any inquiry.
Equipment lost communication with the thermostat.
®
ther­ Check the wiring connections and resistance, then
cycle the system power. This alarm stops all associ­
ated HVAC operations and waits for a signal from the
non-communicating unit. The alarm / fault clears after
communication is re­established.
There is a control hardware problem. Replace the out­
door control if the problem prevents operation and is
persistent. The alarm / fault is cleared 300 seconds after
the fault recovers.
Reconfigure the system. Replace the control if heating or
cooling is not available.
Replace outdoor control.
Valid temperature reading is lost during normal opera­
tion and after outdoor control recognized sensors.
Compare outdoor sensor resistance to temperature/
resistance charts in unit installation instructions. Re­
place sensor pack if necessary. At the beginning of
(any) configuration, furnace or air­handler control de­
tects the presence of the sensor(s). If detected (reading
in range), appropriate feature is shown in the iComfort
Wi­Fi
upon configuration, or when normal values are sensed.
Page 30
Possible Causes and Clearing Alarm
®
thermostat About screen. The alarm / fault clears
XP25