Lennox International Inc XC1702, XP2101, XC2105, XP1906, XP1702 Alert Codes and Troubleshooting

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Table 5. Alert Codes and Troubleshooting

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

 

 

 

Alert

 

 

 

Code

Priority

Alert Text

Steps to clear

 

 

 

 

275

Critical

(Furnace) The furnace flame is out of sequence.

The system will go into Watchguard mode. Shut off gas. Check for gas valve leak. The alarm/fault

 

 

 

will clear on next successful ignition.

 

 

 

 

276

Critical

(Furnace) The furnace is not able to calibrate or

The system will go into Watchguard mode. Check vent system and pressure

 

 

the high pressure switch opened or failed to

switch wiring connections. The fault/alarm will clear when the furnace calibrates itself successfully.

 

 

close in run mode.

 

 

 

 

 

290

Critical

(Furnace) There is a problem with the furnace

The system will go into Watchguard mode. Measure resistance of hot surface igniter. Replace the hot

 

 

ignition circuit.

surface ignitor it is not within specifications. The alarm/fault will clear on next successful ignition.

 

 

 

 

291

Critical

(Furnace) The heating airflow is below the mini-

The system will go into Watchguard mode. Check for dirty filters and other air flow restrictions. Check

 

 

mum required level.

blower performance. The alarm/fault will clear when a heat call ends successfully.

 

 

 

 

292

Critical

(Furnace / Air Handler) The (furnace or air−han-

The system will go into Watchguard mode. Indoor blower motor unable to start. This could be due to

 

 

dler) indoor blower motor will not start.

seized bearing, stuck wheel, obstruction etc. Replace motor or wheel if assembly does not operate or

 

 

 

meet performance standards. The alarm/fault clears after the indoor blower motor starts successfully.

 

 

 

 

294

Critical

(Furnace) There is over current in the furnace

The system will go into Watchguard mode. Check combustion blower bearings, wiring and amps.

 

 

inducer motor.

Replace if does not operate or does not meet performance standards. The alarm/fault clears after

 

 

 

inducer current is sensed to be in−range after the ignition following the Watchguard mode or reset.

 

 

 

 

295

Minor

(Furnace) The indoor blower motor is over heat-

Indoor blower motor over temperature (motor tripped on internal protector). Check motor bearings

 

 

ing.

and amps. Replace if necessary. The alarm/fault clears after blower demand is satisfied.

 

 

 

 

310

Critical

(Furnace / Air Handler) There is a problem with

Compare outdoor sensor resistance to temperature/resistance charts in installation instructions.

 

 

(furnace or air−handler) discharge air sensor.

Replace sensor if necessary. The alarm/fault is cleared 30 seconds after fault is detected as recov-

 

 

 

ered.

 

 

 

 

311

Minor

(Furnace) The heat firing rate has been reduced

Warning Only. Furnace blower in cutback mode due to restricted airflow. Reduce firing rate every 60

 

 

to match available airflow (cutback mode).

seconds to match available CFM. Check filter and duct system. To clear, replace filter if needed or

 

 

 

repair/add duct. 2−stage controls will reduce firing rate to 1st stage. The alarm/fault clears when a

 

 

 

heat call finishes successfully.

 

 

 

 

312

Minor

(Furnace / Air Handler) The blower cannot pro-

Warning Only. Restricted airflow − Indoor blower is running at a reduced CFM (Cutback Mode − The

 

 

vide the requested CFM due to high static.

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 filter

 

 

 

and duct system. To clear, replace filter if needed or repair/add duct. The alarm/fault is cleared after

 

 

 

the current service demand is satisfied.

 

 

 

 

313

Minor

(Furnace / Air Handler) The indoor and outdoor

Check for proper configuring in installation instructions. Alarm is just a warning. The system will

 

 

unit capacities do not match.

operate, but might not meet efficiency and capacity parameters. The alarm will clear after commis-

 

 

 

sioning is complete.

 

 

 

 

344

Critical

(Furnace) Relay Y1 Failure

Y1 relay failed; operation stopped. Alarm clears 300 seconds after Y1 input sensed OFF.

 

 

 

 

table continued on next page

506920−01 09/12

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Contents 2P0912**P506920-01 INSTALLER’S SYSTEM SETUP GUIDEicomfortt−Enabled Units CONTROLSPage Setting up typical icomfortt systemsTable of Contents Figure 1. icomfort by Lennoxt system SupportsOutdoor Temperature Sensor option Installation and Setup Dealer Number Change settingsFigure 3. Settings change tools Figure 4. EnteringCirculate fan ON time setting Table 1. System setting defaults and rangeFigure 5. View/edit time and date Set time and date09 39 am Figure 6. Set current time and dateFigure 7. Using the Add or Remove Non−communicating equipment HUMIDITY CONTROL TIPSred settings Add Non−Communicating Outdoor unitFigure 8. Add non−communicating device SystemSystem 5a 5bFigure 9. Add or remove non−communicating device HumidifierDehumidifier Figure 10. Add or remove non−communicating deviceSystem DehumidifierAdjust a setting screen communicating devices Figure 11. Adjust communicating device screensG71MPP or SLP98 Furnace Note Figure 12. Accessing device to modifyFigure 13. Modify device settings Figure 14. Adjust a non−communicating device setting Figure 15. Adjust a non−communicating device setting Figure 16. Adjust dehumidification when not using Humiditrol or an auxiliary dehumidifier DEHUMIDIFICATION modes Humidification and Dehumidification ModesHUMIDIFICATION modes Figure 18. Select tests to run screen Use the Tests / Diagnostics featuresFigure 17. Start testing screen Figure 19. Typical tests results screensFigure 20. Testing finished screen Equipment, Alerts, DiagnosticsSet up Equipment parameters Figure 21. Equipment parameters screenRun Diagnostics Figure 22. Edit equipment detailsFigure 23. Select device and run diagnostics View and clear Installer AlertsFigure 24. Selecting and viewing alerts Figure 25. Cleared alert confirmationView cleared alerts Figure 26. Cleared alerts screenSTART Figure 27. Wi−Fi setupSecure Connection Recommended HEREFigure 28. Change Networks Registering the icomfort Wi-FitthermostatRegistration for online access Figure 30. icomfort Wi-FitRegistration screen Figure 31. PC Welcome Screen Welcome homeHow Do I Upload a Skin? Wi-FitTherAccess installer program from Home screen yes noReconfigure a system Figure 34. Re−configuration process2nd Stage Differential where applicable2 Smooth Setback Recovery SSR Rules for SSRLow Balance Point Heat Pump, Dual Fuel and Balance PointsHeat Pump Balance Points High Balance PointShut down HP Figure 36. Variable Capacity Operation Flow Chart Gas Heat Control ModeStaged operation Table 2. Variable Capacity Furnace OperationLoad−tracking Variable Capacity FAQs SLP98V only Table 3. Adjustable Parameters Table Installer Installer entryTable 3. Adjustable Parameters Table Installer Lock in 2nd stage HP by Outdoor TempTable 3. Adjustable Parameters Table Installer AIR HANDLERFURNACE Gas Heat Airflow SettingsTable 3. Adjustable Parameters Table Installer Table 3. Adjustable Parameters Table Installer Cooling Airflow SettingsHeat Pump Airflow Settings Other Parameters Table 3. Adjustable Parameters Table InstallerTable 4. Adjustable Parameters Table User Filter 1 Timer Table 5. Alert Codes and Troubleshooting Table 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertHomeowner Service Alert Codes8 Table 5. Alert Codes and TroubleshootingPossible Cause Table 6. Troubleshooting TipsIssue / Problem Corrective Action / CommentsTable 6. Troubleshooting Tips High Balance Point and Low BalTable 6. Troubleshooting Tips Determine the actual Software verTable 6. Troubleshooting Tips During the cooling mode the disWiring Diagrams icomfortt Communicating System WiringWiring Diagrams icomfort by Lennoxt AIR HANDLER AHCOptional Accessories Wiring for use with any icomfort by Lennoxt systemLVCS Ventilation Control System Optional Accessories Wiringfor use with any icomfort by Lennoxt system attached to the PUSHBUTTON Setting up typical systems TIPSTIPS TIPS Setting up typical systemsT PUMP DUAL FUELTIPS Setting up typical systems TIPSTIPS Setting up typical systemsT PUMP UNITS TIPSTIPS icomfortt−Enabled Unit Table 7. Replacement ControlsREVISION HISTORY Replacement Kit Catalog No
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