Lennox XC17 Series Unit Information page 37

Air Conditioner
Control LEDs
Thermostat Thermostat Thermostat
DS11 DS11
DS14 Red DS14 Red
Green Green
1 Fast
OFF Flash then Not Applicable
Pause
2 Fast
OFF Flash then Not Applicable
Pause
2 Fast
Flash then
ON Not Applicable
Pause
1 Fast
Flash then OFF Not Applicable
Pause
2 Fast
Flash then OFF Not Applicable
Pause
2 Fast
Flash then
ON Not Applicable
Pause
Moderate Alert
NONE NONE
Code 105
Moderate Alert
NONE NONE
Code 120
Critical Alert
NONE NONE
Code 124
Critical Alert
NONE NONE
Code 125
Moderate /
NONE NONE Critical Alert
Code 126
Critical Alert
NONE NONE
Code 131
Critical Alert
NONE NONE
Code 132
SLOW Moderate Alert
OFF
Flash Code 410
Critical Alert
OFF ON
Code 411
SLOW Moderate Alert
OFF
Flash Code 412
Critical Alert
ON OFF
Code 413
icomfort icomfort icomfort
Toucht Toucht Toucht
Condition Condition Condition
Display
Display Display
Heating Low
Capacity
Heating High
Capacity
Defrost
Cooling Low
Capacity
Cooling High
Capacity
Dehumidification
Mode
Device
Communication
Failure
Unresponsive
Device
Active subnet
controller missing
Hardware Failure
Internal control
communication
failure
Corrupted Control
Parameters
Failed Flash CRC
check.
Low Pressure
Fault
Low Pressure
Switch Lockout
High Pressure
Fault
High Pressure
Discharge Sensor
Lockout
Possible Possible Possible
Cause(s) Cause(s) Cause(s)
These are codes that show status of operation whether in low stage or high stage,
heating or cooling, defrost or in the EDA mode.
ALERT STATUS
icomfort Toucht thermostat device is unable to communicate with any other
device on the RSBus. Alarm only occurs if a specific device did communicate
initially after power up and communication was later lost. Possible causes are
lost connection, bus short or open, or other device stop responding.
Message could be sent by any device on RSBus if expected response
message is not received from other device. If sent by indoor or air conditioner
control, device did not get expected response (incorrect or no response at all)
from active Subnet controller. If sent by the icomfort Touch, and did not get the
expected response (incorrect or no response at all) from device. Normally this
indicate device malfunction.
Device lost connection to icomfort Toucht thermostat. Thermostat is sending
heartbeat message in one minute intervals. Device sets this alarm if no
Heartbeat is received for three minutes. Normally this indicate lost connection
to thermostat, or thermostat is not working. Alert will clear after valid subnet
controller message is received.
Entire or partial system failure. Alert will clear 300 seconds after fault has
recovered.
Internal communication on air conditioner control. Alert will clear 300 seconds
after fault has recovered.
System stored configuration data is corrupted. System will not run. Refer to
communicating thermostat for memory corrupt handling.
No operations, air conditioner control enters boot loader mode. Alarm will
clears after reset.
1
Restricted air
flow over indoor
or outdoor coil.
2
Improper refrig-
1
Remove any blockages or restrictions from coils and/or
erant charge in
fans. Check indoor and outdoor fan motor for proper cur-
system.
rent draws.
3
Improper meter- 2
Check system charge using approach and subcooling
ing device
temperatures.
installed or in-
3
Check system operating pressures and compare to unit
correct opera-
charging charts.
tion of metering
4
Make sure all pressure switches and sensors have se-
device.
cure connections to system to prevent refrigerant leaks
4
Incorrect or im-
or errors in pressure and temperature measurements.
proper sensor
location or con-
nection to sys-
tem.
Page 37
Solution Solution Solution
XC17