Lennox XC21 Installation Instructions Manual page 35

Outdoor A175 Main
Control LEDs
Thermostat Thermostat Thermostat
DS11 DS11
DS14 Red DS14 Red
Green Green
1 Fast
Flash then
OFF Not Applicable
Pause
2 Fast
Flash then
OFF 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
Moderate Alert
NONE NONE
Critical Alert
NONE NONE
Critical Alert
NONE NONE
NONE NONE Critical Alert
Critical Alert
NONE NONE
Critical Alert
NONE NONE
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
Code 105
Failure
Unresponsive
Code 120 Device
Active subnet
Code 124 controller missing
Hardware Failure
Code 125
Moderate / Internal control
communication
Code 126 failure
Corrupted Control
Code 131 Parameters
Failed Flash CRC
Code 132 check.
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 outdoor control, device did
not get expected response (incorrect or no response at all) from active Subnet
controller. If sent by the icomfort Toucht thermostat, 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 recov-
ered.
Internal communication on outdoor 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, A175 control enters boot loader mode. Alarm will clears after
reset.
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Solution Solution Solution
XC21 SERIES