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

Page 52

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

 

 

 

 

354

Critical

(Air Handler) There is a problem with the air−

Heat section / Stage 4 failed (Same as Code 351).

 

 

handler’s 4th stage electric heat. Either the pilot

 

 

 

relay contacts did not close, or the relay coil in

 

 

 

the electric heat section did not energize. The

 

 

 

air−handler will operate on 1st stage electric

 

 

 

heat until the issue is resolved.

 

 

 

 

 

355

Critical

(Air Handler) There is a problem with the air−

Heat section / Stage 5 failed (Same as Code 351).

 

 

handler’s 5th stage electric heat. Either the pilot

 

 

 

relay contacts did not close, or the relay coil in

 

 

 

the electric heat section did not energize. The

 

 

 

air−handler will operate on 1st stage electric

 

 

 

heat until the issue is resolved.

 

 

 

 

 

370

Critical

(Furnace) The furnace control board has not

Control sees the loss of 24VAC for 2 minutes .Terminate all services and wait for interlock switch to

 

 

received 24VAC power for 2 minutes or more.

close. The alarm will clear when 24VAC is continuously sensed on DS terminal for a minimum of 10

 

 

 

seconds or on a power reset. If 2 stage with float switch, the IFC control R−DS is open.

 

 

 

 

400

Critical

(Outdoor Unit) The compressor internal over-

Thermostat demand Y1 is present; but, compressor is not running. Check power to unit. Clears the

 

 

load has tripped.

error after current is sensed in both RUN and START sensors for at least 2 seconds, or after service

 

 

 

is removed, or after power reset.

 

 

 

 

401

Moderate

(Outdoor Unit) Either the compressor ran for

Compressor ran more than 18 hours to satisfy a single thermostat demand. Will not lockout system.

 

 

more than 18 hours continuously trying to cool

if 2 stage, units with blinking LED light controls, unit will run in low speed; units with 7−segment

 

 

the home or the refrigerant pressure in the sys-

display will display code, but continue to run in high speed. If a Heat Pump, and if outdoor temp is

 

 

tem is low.

less than 65 degrees, code is ignored. Clears the error after 30 consecutive normal run cycles or

 

 

 

power reset. Also monitors low pressure switch trips.

 

 

 

 

402

Critical

(Outdoor Unit) Either the discharge or suction

Discharge or suction pressure out−of−limits, or compressor overloaded. Clears the error after 4 con-

 

 

pressure level is out−of−limits, or the is compres-

secutive normal compressor run cycles.

 

 

sor overloaded.

 

 

 

 

 

403

Moderate

(Outdoor Unit) The compressor ran for less than

Compressor runs less than 3 minutes to satisfy a thermostat demand. Clears the

 

 

3 minutes to satisfy a thermostat demand.

error after 4 consecutive normal run cycles or power reset.

 

 

 

 

404

Critical

(Outdoor Unit) The compressor rotor is locked

Compressor rotor locked up due to run capacitor short, bearings are seized, excessive liquid refriger-

 

 

up. This could be due to a short circuiting of the

ant, etc. (NOTE: May need to install hard start kit). Clears the error after 4 consecutive normal run

 

 

run capacitor, seizing of the bearings or exces-

cycles or after power reset.

 

 

sive liquid refrigerant etc.

 

 

 

 

 

405

Critical

(Outdoor Unit) The compressor circuit is open.

Compressor circuit open (due to power disconnection, open fuse, etc.) Clears the

 

 

This could be due to a power disconnection,

error after 1 normal compressor run cycle.

 

 

open fuse etc.

 

 

 

 

 

406

Critical

(Outdoor Unit) The required amount of current is

Required amount of current is not passing through Start current transformer. Clears the error after

 

 

not passing through the start current transform-

current is sensed in START sensor, or after power reset.

 

 

er.

 

 

 

 

 

 

 

 

table continued on next page

506920−01 09/12

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Contents INSTALLER’S SYSTEM SETUP GUIDE icomfortt−Enabled Units2P0912**P506920-01 CONTROLSTable of Contents Setting up typical icomfortt systemsPage Outdoor Temperature Sensor option SupportsFigure 1. icomfort by Lennoxt system Installation and Setup Change settings Figure 3. Settings change toolsDealer Number Figure 4. EnteringCirculate fan ON time setting Table 1. System setting defaults and rangeSet time and date 09 39 amFigure 5. View/edit time and date Figure 6. Set current time and dateFigure 7. Using the Add or Remove Non−communicating equipment HUMIDITY CONTROL TIPSAdd Non−Communicating Outdoor unit Figure 8. Add non−communicating devicered settings System5a 5b Figure 9. Add or remove non−communicating deviceSystem HumidifierFigure 10. Add or remove non−communicating device SystemDehumidifier DehumidifierAdjust a setting screen communicating devices Figure 11. Adjust communicating device screensFigure 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 Use the Tests / Diagnostics features Figure 17. Start testing screenFigure 18. Select tests to run screen Figure 19. Typical tests results screensEquipment, Alerts, Diagnostics Set up Equipment parametersFigure 20. Testing finished screen Figure 21. Equipment parameters screenRun Diagnostics Figure 22. Edit equipment detailsFigure 23. Select device and run diagnostics View and clear Installer AlertsFigure 25. Cleared alert confirmation View cleared alertsFigure 24. Selecting and viewing alerts Figure 26. Cleared alerts screenFigure 27. Wi−Fi setup Secure Connection RecommendedSTART HERERegistration for online access Registering the icomfort Wi-FitthermostatFigure 28. Change Networks Figure 30. icomfort Wi-FitRegistration screen Welcome home How Do I Upload a Skin?Figure 31. PC Welcome Screen 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 SSRHeat Pump, Dual Fuel and Balance Points Heat Pump Balance PointsLow Balance Point 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 HANDLERTable 3. Adjustable Parameters Table Installer Gas Heat Airflow SettingsFURNACE Heat Pump Airflow Settings Cooling Airflow SettingsTable 3. Adjustable Parameters Table Installer 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 TroubleshootingTable 6. Troubleshooting Tips Issue / ProblemPossible Cause 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 systemfor use with any icomfort by Lennoxt system Optional Accessories WiringLVCS Ventilation Control 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 Table 7. Replacement Controls REVISION HISTORYicomfortt−Enabled Unit Replacement Kit Catalog No
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