Lennox International Inc CBX40UHV02, XP2101, XC2105, XC1702, XP1906 Alert Codes and Troubleshooting

Page 47

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

 

 

 

 

113

Critical

(Furnace) The line voltage is too high.

Line voltage high (voltage higher than nameplate rating). Provide power voltage within proper range.

 

 

 

System resumes normal operation 5 seconds after fault recovered.

 

 

 

 

114

Critical

(Furnace / Air Handler) There is a frequency/

This alarm/code may indicate transformer overloading. Check the voltage and line power frequency.

 

 

distortion problem with the power to the (furnace

Check the generator operating frequency, if the system is running on back−up power. Correct voltage

 

 

or air−handler).

and frequency problems. System resumes normal operation 5 seconds after fault recovered.

 

 

 

 

115

Critical

(Furnace / Air Handler) The 24VAC to the (fur-

24−Volt Power Low (Range is 18 to 30 volts). Check and correct voltage. Check for additional power−

 

 

nace or air−handler control board) is lower than

robbing equipment connected to system. This alarm/code may require the installation of an addition-

 

 

the required range of 18 to 30VAC.

al or larger VA transformer.

 

 

 

 

117

Minor

(Furnace) The reporting unit has poor earth

Provide proper grounding for the unit. Check for proper earth ground to the system. The alarm/code

 

 

grounding.

will clear 30 seconds after it is corrected.

 

 

 

 

120

Moderate

(Stat / Furnace / Air Handler / Outdoor Unit)

Typically, this alarm/code does not cause any issues and will clear on its own. The alarm/code is

 

 

There is a delay in the (stat, furnace, air−handler

usually caused by a delay in the outdoor unit responding to the thermostat. Check all wiring connec-

 

 

or outdoor unit) responding to the system.

tions. Cleared after unresponsive device responds to any inquiry.

 

 

 

 

124

Critical

(Stat / Furnace / Air Handler / Outdoor Unit) The

Equipment lost communication with the thermostat. Check the wiring connections, ohm wires and

 

 

thermostat has lost communication with the (fur-

cycle power. The alarm stops all associated HVAC operations and waits for a heartbeat message

 

 

nace, air−handler or outdoor unit) for more than

from the unit that’s not communicating. The alarm/fault clears after communication is re−established.

 

 

3 minutes.

 

 

 

 

 

125

Critical

(Stat / Furnace / Outdoor Unit) There is a hard-

There is a control hardware problem. Replace the control if the problem prevents operation and is

 

 

ware problem on either the (stat, furnace control

persistent. The alarm/fault is cleared 300 seconds after the fault recovers.

 

 

board, air−handler control board or outdoor unit

 

 

 

control board).

 

 

 

 

 

126

Critical

(Furnace / Outdoor Unit) There is an internal

There is an internal hardware problem on the control. Typically the control will re−set itself. Replace

 

 

communication problem with the (furnace con-

the control if the problem prevents operation and is persistent. The alarm/fault is cleared 300 sec-

 

 

trol board, air−handler control board or outdoor

onds after the fault recovers.

 

 

unit control board).

 

 

 

 

 

130

Moderate

(Air Handler) An air−handler configuration jump-

Configuration jumper(s) missing on control (applicable in non−communicating applications only).

 

 

er is missing.

Replace the jumper or put wire between terminals on control. Cleared after jumper is connected.

 

 

 

 

131

Critical

(Stat / Furnace / Air Handler / Outdoor Unit) The

Reconfigure the system. Replace the control if heating or cooling is not available.

 

 

(stat, furnace, air−handler or outdoor unit) con-

 

 

 

trol parameters are corrupted.

 

 

 

 

 

132

Critical

(Air Handler) The air handler control software is

Recycle power. If failure re−occurs, replace the control. System reset is required to recover.

 

 

corrupted.

 

 

 

 

table continued on next page

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icomfort Wi-Fit 7−Day Programmable Communicating Thermostat

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Contents CONTROLS INSTALLER’S SYSTEM SETUP GUIDEicomfortt−Enabled Units 2P0912**P506920-01Page Setting up typical icomfortt systemsTable of Contents Figure 1. icomfort by Lennoxt system SupportsOutdoor Temperature Sensor option Installation and Setup Figure 4. Entering Change settingsFigure 3. Settings change tools Dealer NumberTable 1. System setting defaults and range Circulate fan ON time settingFigure 6. Set current time and date Set time and date09 39 am Figure 5. View/edit time and dateFigure 7. Using the HUMIDITY CONTROL TIPS Add or Remove Non−communicating equipmentSystem Add Non−Communicating Outdoor unitFigure 8. Add non−communicating device red settingsHumidifier 5a 5bFigure 9. Add or remove non−communicating device SystemDehumidifier Figure 10. Add or remove non−communicating deviceSystem DehumidifierFigure 11. Adjust communicating device screens Adjust a setting screen communicating devicesG71MPP 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 19. Typical tests results screens Use the Tests / Diagnostics featuresFigure 17. Start testing screen Figure 18. Select tests to run screenFigure 21. Equipment parameters screen Equipment, Alerts, DiagnosticsSet up Equipment parameters Figure 20. Testing finished screenFigure 22. Edit equipment details Run DiagnosticsView and clear Installer Alerts Figure 23. Select device and run diagnosticsFigure 26. Cleared alerts screen Figure 25. Cleared alert confirmationView cleared alerts Figure 24. Selecting and viewing alertsHERE Figure 27. Wi−Fi setupSecure Connection Recommended STARTFigure 28. Change Networks Registering the icomfort Wi-FitthermostatRegistration for online access Figure 30. icomfort Wi-FitRegistration screen Wi-FitTher Welcome homeHow Do I Upload a Skin? Figure 31. PC Welcome Screenyes no Access installer program from Home screenFigure 34. Re−configuration process Reconfigure a system2nd Stage Differential where applicable2 Rules for SSR Smooth Setback Recovery SSRHigh Balance Point Heat Pump, Dual Fuel and Balance PointsHeat Pump Balance Points Low 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 InstallerFURNACE Gas Heat Airflow SettingsTable 3. Adjustable Parameters Table Installer Table 3. Adjustable Parameters Table Installer Cooling Airflow SettingsHeat Pump Airflow Settings 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 Codes8Corrective Action / Comments Table 6. Troubleshooting TipsIssue / Problem Possible CauseHigh 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 WiringLVCS Ventilation Control System Optional Accessories Wiringfor use with any icomfort by Lennoxt 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 Replacement Kit Catalog No Table 7. Replacement ControlsREVISION HISTORY icomfortt−Enabled Unit
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