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

Page 49

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

 

 

 

 

226

Critical

(Furnace) The furnace high pressure switch is

Check operation of high pressure switch closing during a heat call. Measure operating pressure

 

 

stuck closed.

(inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. The

 

 

 

alarm/fault clears after the issue is corrected.

 

 

 

 

227

Moderate

(Furnace) The furnace low pressure switch is

Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating

 

 

open in run mode.

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

 

 

 

The alarm/fault clears after the issue is corrected.

 

 

 

 

228

Moderate

(Furnace) The furnace control is not able to cali-

Unable to perform pressure switch calibration. Check vent system and pressure

 

 

brate the pressure switch.

switch wiring connections. Check the drain trap for blockage. The alarm/fault clears after a success-

 

 

 

ful calibration.

 

 

 

 

229

Minor

(Furnace) The furnace control has switched to

IFC switched to high fire ignition because low fire pressure switch did not close in allowed time. No

 

 

high fire ignition because the low fire pressure

action is needed.

 

 

switch did not close in the allowed time.

 

 

 

 

 

240

Moderate

(Furnace) The furnace flame current is low.

Check micro−amperes of the flame sensor using thermostat diagnostics. Clean or replace the flame

 

 

 

sensor. Measure voltage of neutral to ground to ensure good unit ground. The alarm clears after a

 

 

 

proper micro−amp reading has been sensed.

 

 

 

 

241

Critical

(Furnace) The furnace flame is going out while

Shut off gas. Check for a gas valve leak. Replace the gas valve if needed. The alarm/fault will clear

 

 

the furnace is heating.

when a heat call ends successfully.

 

 

 

 

250

Moderate

(Furnace) The furnace primary limit switch is

Check for proper firing rate on furnace. Ensure there is no blockage in the furnace and the ductwork.

 

 

open.

Check for proper air flow. If limit switch is not closed within 3 minutes, the unit will go into 1−hour

 

 

 

Watchguard mode. The alarm/fault will clear when a heat call ends successfully.

 

 

 

 

252

Moderate

(Furnace) The furnace discharge air−tempera-

Check temperature rise, air flow and input rate. Check for dirty filters. The alarm/fault will clear when

 

 

ture is high.

a heat call ends successfully.

 

 

 

 

270

Critical

(Furnace) The furnace is in Watchguard mode.

Check for proper gas flow. Ensure that igniter is lighting burner. Check flame sensor current. Check

 

 

The furnace igniter cannot turn on the flame.

for dirty filters. The alarm/fault will clear on successful ignition.

 

 

 

 

271

Critical

(Furnace) The furnace is in Watchguard mode.

Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating

 

 

The furnace low pressure switch is open.

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

 

 

 

The alarm/fault will clear on successful ignition.

 

 

 

 

272

Critical

(Furnace) The furnace is in Watchguard mode.

Check operation of low pressure switch to see if it is stuck open during a heat call. Measure operat-

 

 

The furnace low pressure switch is open during

ing pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restric-

 

 

run mode.

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

 

 

 

 

273

Critical

(Furnace) The furnace is in Watchguard mode.

Check micro−amperes of flame sensor using thermostat diagnostics. Clean or replace sensor. Mea-

 

 

The furnace flame is going off during a heating

sure voltage of neutral to ground to ensure good unit ground. The alarm/fault will clear when a heat

 

 

cycle.

call ends successfully.

 

 

 

 

274

Critical

(Furnace) The furnace limit switch has been

The system will go into Watchguard mode. Check firing rate and air flow. Check for blockage. The

 

 

open for more than 3 minutes.

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

 

 

 

 

table continued on next page

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icomfort Wi-Fit 7−Day Programmable Communicating Thermostat

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Page 48 Page 50
Contents icomfortt−Enabled Units INSTALLER’S SYSTEM SETUP GUIDE2P0912**P506920-01 CONTROLSTable of Contents Setting up typical icomfortt systemsPage Outdoor Temperature Sensor option SupportsFigure 1. icomfort by Lennoxt system Installation and Setup Figure 3. Settings change tools Change settingsDealer Number Figure 4. EnteringTable 1. System setting defaults and range Circulate fan ON time setting09 39 am Set time and dateFigure 5. View/edit time and date Figure 6. Set current time and dateFigure 7. Using the HUMIDITY CONTROL TIPS Add or Remove Non−communicating equipmentFigure 8. Add non−communicating device Add Non−Communicating Outdoor unitred settings SystemFigure 9. Add or remove non−communicating device 5a 5bSystem HumidifierSystem Figure 10. Add or remove non−communicating deviceDehumidifier DehumidifierFigure 11. Adjust communicating device screens Adjust a setting screen communicating devicesFigure 13. Modify device settings Figure 12. Accessing device to modifyG71MPP or SLP98 Furnace Note 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 HUMIDIFICATION modes Humidification and Dehumidification ModesDEHUMIDIFICATION modes Figure 17. Start testing screen Use the Tests / Diagnostics featuresFigure 18. Select tests to run screen Figure 19. Typical tests results screensSet up Equipment parameters Equipment, Alerts, DiagnosticsFigure 20. Testing finished screen Figure 21. Equipment parameters screenFigure 22. Edit equipment details Run DiagnosticsView and clear Installer Alerts Figure 23. Select device and run diagnosticsView cleared alerts Figure 25. Cleared alert confirmationFigure 24. Selecting and viewing alerts Figure 26. Cleared alerts screenSecure Connection Recommended Figure 27. Wi−Fi setupSTART HERERegistration for online access Registering the icomfort Wi-FitthermostatFigure 28. Change Networks Figure 30. icomfort Wi-FitRegistration screen How Do I Upload a Skin? Welcome homeFigure 31. PC Welcome Screen Wi-FitTheryes no Access installer program from Home screenFigure 34. Re−configuration process Reconfigure a system2nd Stage Differential where applicable2 Rules for SSR Smooth Setback Recovery SSRHeat Pump Balance Points Heat Pump, Dual Fuel and Balance PointsLow Balance Point High Balance PointShut down HP Gas Heat Control Mode Figure 36. Variable Capacity Operation Flow ChartTable 2. Variable Capacity Furnace Operation Staged operationLoad−tracking Variable Capacity FAQs SLP98V only Installer entry Table 3. Adjustable Parameters Table InstallerLock in 2nd stage HP by Outdoor Temp Table 3. Adjustable Parameters Table InstallerAIR HANDLER Table 3. Adjustable Parameters Table InstallerTable 3. Adjustable Parameters Table Installer Gas Heat Airflow SettingsFURNACE Heat Pump Airflow Settings Cooling Airflow SettingsTable 3. Adjustable Parameters Table Installer Table 3. Adjustable Parameters Table Installer Other ParametersTable 4. Adjustable Parameters Table User Filter 1 Timer Table 5. Alert Codes and Troubleshooting Alert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingAlert Table 5. Alert Codes and TroubleshootingTable 5. Alert Codes and Troubleshooting Homeowner Service Alert Codes8Issue / Problem Table 6. Troubleshooting TipsPossible Cause Corrective Action / CommentsHigh Balance Point and Low Bal Table 6. Troubleshooting TipsDetermine the actual Software ver Table 6. Troubleshooting TipsDuring the cooling mode the dis Table 6. Troubleshooting Tipsicomfortt Communicating System Wiring Wiring Diagramsicomfort by Lennoxt AIR HANDLER AHC Wiring Diagramsfor use with any icomfort by Lennoxt system Optional Accessories Wiringfor use with any icomfort by Lennoxt system Optional Accessories WiringLVCS Ventilation Control System attached to the PUSHBUTTON TIPS Setting up typical systemsTIPS TIPS Setting up typical systemsT PUMP DUAL FUELTIPS TIPS Setting up typical systemsTIPS TIPS Setting up typical systemsT PUMP UNITSTIPS REVISION HISTORY Table 7. Replacement Controlsicomfortt−Enabled Unit Replacement Kit Catalog No
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