56
Table 19. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop-up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
14
Critical
Duplicate
Equipment
Too Many Devices
of the Same Type
The thermostat found more than one thermostat, indoor or outdoor unit on the system.
•
Check wiring and remove duplicate equipment.
• Go to
menu
>
settings
>
advanced settings
>
view dealer control center
>
equipment
and press
re-configure system
.
This will allow the system to auto-detect any new Lennox communicating devices attached.
• Automatically clears when the system detects that the issue no longer exists.
29
Critical
HD Display
(Thermostat)
Over Temperature
Protection
The thermostat is reading an indoor temperature that is higher than 90ºF (factory default). The thermostat will not allow any
heating operation to begin until it senses an indoor temperature lower than 90ºF. Indoor temperature rose above 90ºF during a
heating demand.
• Heating operation is not allowed.
•
Check to ensure that heating equipment is not stuck ON (reversing valve, etc.)
• Check the accuracy of the thermostat temperature sensor.
•
Select cooling system mode to cool the indoor space below 90ºF.
• Automatically clears when the system detects that the issue no longer exists.
30
Moderate
HD Display
(Thermostat)
Low Temperature
Protection
The thermostat will not allow any cooling operation to begin until it senses a temperature higher than 40ºF.
• Cooling operation is not allowed.
• Check to ensure that cooling equipment is not stuck ON.
• Check accuracy of the thermostat temperature sensor.
•
Select heating system mode to heat the indoor space to above 40ºF.
• Automatically clears when the system detects that the issue no longer exists.
31
Critical
Any Failed
Communicating
Component
Lost
communication
with DEVICE2
The applicable system component (indoor unit, equipment interface or iHarmony control module or outdoor unit) has not
communicated with thermostat for more than three minutes.
•
Check connections and voltages.
• Ohm wires for electrical continuity.
•
If float switch is installed on air handler drain pain, check condensate line to ensure it is not clogged and tripping the float
switch connected in series with
R
terminal.
• Check to see if freezestat is installed.
• If fault persists, then cycle power.
• Fault clears after communication is restored.
