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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
312
Minor
Furnace or air
handler
Reduced/Airflow-
Indoor Blower
Cutback
The indoor blower cannot provide the requested CFM due to excessive static pressure. This is a warning only alert code.
• Static pressure has exceeded the capability of the blower motor.
•
•
Possible restricted airflow - Indoor blower is running at a reduced CFM (Cutback Mode).
•
The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating
outside of design parameters (0 to 0.8” e.g. total external static pressure).
•
Check air filter and duct system.
•
To clear, replace air filter if needed or repair or add additional ducting.
NOTE:
Blower motor cutbacks will not show alarm code. Duct static pressure reading must be taken.
•
Automatically clears when a heating call finishes successfully.
313
Minor
Furnace, air
handler and
outdoor unit
Indoor/Outdoor
Unit Capacity
Mismatch
The indoor and outdoor unit capacities do not match. This is a warning only alert code.
•
Check for proper system component configuring in installation instructions.
•
The system will operate, but might not meet efficiency and capacity parameters.
Automatically clears when a heating call finishes successfully.
344
Critical
Furnace
Relay Y1 Stuck
Link Relay Problem. Relay
Y1
Failure which will result in the all system operations stopping.
NOTE:
Relay is located on the IFC (Integrated Furnace Control). If issue continues replace IFC.
Automatically clears five minutes after
Y1
input sensed OFF.
345
Critical
Air handler,
equipment
interface
module or heat
pump
Relay O Failure
The
O
relay on the system component has failed. Either the pilot relay contacts did not close or the relay coil did not energize.
• Possible
O
relay / stage 1 failure.
• Pilot relay contacts did not close or the relay coil did not energize.
•
Replace system component (device) control.
•
If error is applicable to the any Lennox variable capacity outdoor unit, the outdoor control will need to be replaced.
Automatically clears after the fault recovered following reset.
346
Critical
Air handler
HP Jumper Not
Removed
The heat pump configuration link is not cut on the air handler control.
•
Configuration link not cut on air handler control.
• Cut
O
to
R
.
NOTE:
This is only applicable with non-communicating heat pump with communicating indoor unit.
Automatically clears when the system detects that the issue no longer exists.
