A.O. Smith 3400, 2600, 1700, 2000 Flame Operation Faults 105 Flame detected out of sequence

Page 64

CODE

DESCRIPTION

RECOMMENDED TROUBLESHOOTING OF

NOTE

 

 

 

LOCKOUT CODES

 

94

Header sensor fault

1.

Check wiring and correct any possible errors.

H

 

 

2.

Replace the header sensor.

 

 

 

3.

If previous steps are correct and fault persists,

 

 

 

 

replace the module.

 

95

Stack sensor fault

1.

Check wiring and correct any possible errors.

H

 

 

2.

Replace the stack sensor.

 

 

 

3.

If previous steps are correct and fault persists,

 

 

 

 

replace the module.

 

96

Outdoor sensor fault

1.

Check wiring and correct any possible errors.

H

 

 

2.

Replace the outdoor sensor.

 

 

 

3.

If previous steps are correct and fault persists,

 

 

 

 

replace the module.

 

97

Internal Fault: A2D mismatch.

Internal Fault.

L

 

 

1.

Reset Module.

 

98

Internal Fault: Exceeded VSNSR voltage

L

2.

If fault repeats, replace module.

99

Internal Fault: Exceeded 28V voltage tolerance

L

 

 

100

Pressure Sensor Fault

1.

Verify the Pressure Sensor is a 4-20 ma source.

H

 

 

2.

Check wiring and correct any possible errors.

 

 

 

3.

Test Pressure Sensor for correct operation.

 

 

 

4.

Replace the Pressure sensor.

 

 

 

5.

If previous steps are correct and fault persists,

 

 

 

 

replace the module.

 

101-104

RESERVED

 

 

 

 

Flame Operation Faults

 

 

 

105

Flame detected out of sequence

1.

Check that flame is not present in the combustion

H or L

 

 

 

chamber. Correct any errors.

 

 

 

2.

Make sure that the flame detector is wired to the

 

 

 

 

correct terminal.

 

 

 

3.

Make sure the F & G wires are protected from

 

 

 

 

stray noise pickup.

 

 

 

4.

Reset and sequence the module, if code

 

 

 

 

reappears, replace the flame detector.

 

 

 

5.

Reset and sequence the module, if code

 

 

 

 

reappears, replace the module.

 

106

Flame lost in MFEP

1.

Check pilot valve (Main Valve for DSI) wiring and

L

 

 

 

operation - correct any errors.

 

107

Flame lost early in run

 

L

2.

Check the fuel supply.

108

Flame lost in run

L

3.

Check fuel pressure and repeat turndown tests.

109

Ignition failed

4.

Check ignition transformer electrode, flame

L

 

 

 

detector, flame detector siting or flame rod

 

 

 

 

position.

 

 

 

5.

If steps 1 through 4 are correct and the fault

 

 

 

 

persists, replace the module.

 

110

Ignition failure occurred

Hold time of recycle and hold option. Will not be a

H

 

 

lockout fault. Hold Only.

 

111

Flame current lower than WEAK threshold

Internal hardware test. Not a lockout,

H

112

Pilot test flame timeout

Interrupted Pilot or DSI application and flame lost

L

 

 

when system in “test” mode.

 

 

 

1. Reset the module to restart.

 

113

Flame circuit timeout

Flame sensed during Initiate or off cycle, hold 240

L

 

 

seconds, if present after 240 seconds, lockout.

 

114-121

RESERVED

 

 

 

 

Rate Proving Faults

 

 

 

122

Lightoff rate proving failed

1.

Check wiring and correct any potential wiring

L

 

 

 

errors.

 

123

Purge rate proving failed

 

L

2.

Check VFDs ability to change speeds.

 

 

 

 

 

3.

Change the VFD

 

 

 

4.

If the fault persists, replace the module.

 

64

Page 63 Page 65
Image 64
Page 63 Page 65
Contents XP Boiler Table of Contents Approvals Safe INSTALLATION, USE and ServiceImportant Definitions General Safety Introduction Model IdentificationAbbreviations Used QualificationsDimensions and Capacity Data Operating CharacteristicsDouble Heat Exchanger Boiler Rough in Dimensions Double Ratings Electrical RequirementsFLOW, Head and Temperature Rise XB Models FLOW, Head and Temperature RiseFeatures and Components Single Heat Exchanger Boiler ComponentsDouble Heat Exchanger Boiler Components Component Description Low water cutoff board and sensor probe LwcoControl Components Flame Sensor Water Temperature Sensors Water Temperature Limit ControlsMain Power Supply Switch LOW Water Cutoff Device LwcoGeneral Boiler Installation ConsiderationsHydronic System Internal Contaminants HOT Water Boiler System General Water Line ConnectionsClosed Water Systems Thermal ExpansionExplosion Hazard GAS ConnectionsCorrosive Materials and Contamination Sources GAS Supply Line SizingField Wiring VAC Power Supply WiringPower Supply Check LOW Voltage Control WiringSuggested Pipe Size for Multiple GAS Appliances Natural GAS General Requirements Required AbilityLocation Replacing Existing Common Vented BoilerInstallation Clearances Panels and CoversChemical Vapor Corrosion LevelingFresh AIR Openings for Confined Spaces Confined Space Outdoor AIR Through TWO OpeningsOutdoor AIR Through ONE Opening Outdoor AIR Through TWO Horizontal Ducts Outdoor AIR Through TWO Vertical DuctsAIR from Other Indoor Spaces DuctsVenting Requirements for Installation in Canada Vent and AIR Pipe InstallationAIR Inlet Pipe Materials Vertical Installation Requirements Horizontal Installation RequirementsDirect Vent Installation Requirements Venting SupportsModels Vent KIT Numbers XB/XW Rain CAP Models Vent KIT Numbers XB/XW TEEModels Vent AIR Intake XB/XW KIT Numbers TEE Elbow Models Vent AIR Intake XB/XW KIT Numbers Rain CAP ElbowDirect VENT, Vertical Vent Horizontal Intake Termination Clearances Sidewall Power Vent Power VentTermination Clearances Sidewall Direct Vent Direct VentBELOW. Keep Clear of ALL Obstructions VENT/AIR Termination Locations Direct Vent Horizontal TerminationTermination Direct Venting Vertical Termination Prepare ROOF/WALL PenetrationsVertical ClearancesModel Vent Diameter Vent MIN. Length Vent MAX. Length Inch Condensate Disposal Condensate NeutralizerCondensate Trap XP Models AO Smith Condensate Neutralizer KIT NumbersGAS Supply Pipe Connections GAS Supply ConnectionsGAS Pressure Requirements Pipe Sizes for Propane GAS Purging GAS LineCheck GAS Supply Inlet Pressure Check for GAS LeaksFilling and Purging of Heating Boiler Installation Filling HOT Water Supply Boiler InstallationBoiler Start UP and Operations Manifold Pressure ConnectionsFreeze Protection Hydronic Heating Installation CHECK/CONTROL Water HardnessINSPECT/FILL Condensate System Water Hardness Medium 0-12 Grains PER Gallon XW ModelLighting and Operating Instructions Adjustment Setting of the Test ModeHigh Fire Rate Burner Control System Control SystemOverview Communications and Displays SpecificationsBurner Control Operation General Operational Sequence Domestic HOT Water Lead LAGLead LAG LL Master General Operation Local Operator Interface Display System FeaturesDefinitions Quick Setup S7999B OI Display Installation Instructions S7999B OI DisplayMounting the S7999B OI Display and Power Supply POWER-UP Validation Common OI Display page SymbolsStarting UP the S7999B OI Display NavigationS7999B Display page Flow Configure Button Status or HomeConfiguration Password LoginChange Parameter Settings KeyboardExample of Change Configuration Parameter VerifyData Comment FAULT/ALARM HandlingHistory Button Example of Hydronic History Control Expanded Alert Detail Operation ButtonDiagnostics Button System Configuration S7999B OI Display onlySystem Synchronization S7999B OI Display only ConfigurationHydronic Control Troubleshooting Code Description Recommended Troubleshooting Lockout CodesReserved ILK OFF Flame Operation Faults 105 Flame detected out of sequence Adjust the LF switch while in this position Inspect the Combustion Pressure Switch to make Code Description Recommended Troubleshooting Lockout Codes Code Description Recommended Troubleshooting Lockout Codes Code Description AllowedFan Parameter Errors Code Description Steam 20mA water temperature setting was invalid Abnormal Recycle Hardware flame bias delta high Eeprom DHW Plate Heat Exchanger Errors Maintenance Procedures Maintenance SchedulesGeneral Maintenance Inspect Boiler AreaBlower Compartment Burner MaintenanceAIR Filter BOX Heat Exchanger Maintenance Venting MaintenanceCondensate Removal System Replacement Parts Handling Ceramic Fiber MaterialsPiping Diagrams Inlet DIAStorage Tank AOS Limited Warranty Conditions and Exceptions

3400, 1700, 2000, 2600 specifications

A.O. Smith, a leader in water heating solutions, has developed a range of high-efficiency water heaters that cater to various residential and commercial needs. Among their stellar offerings are the A.O. Smith 2600, 2000, 1700, and 3400 models, each boasting impressive features, cutting-edge technologies, and excellent energy efficiency.

The A.O. Smith 2600 model is designed for those who require a robust water heating solution with a capacity to handle high-demand scenarios. It utilizes a highly efficient heating element that provides rapid heating and maintains a steady output. The built-in smart control system allows users to monitor temperature settings and track energy consumption, ensuring optimal performance.

Next in line, the A.O. Smith 2000 is perfect for households that require a reliable and efficient water heater without compromising on space. This compact model integrates advanced thermal insulation that minimizes heat loss, coupled with a powerful heating element that ensures quick heating times. Its sleek design makes it suitable for various installations while maintaining aesthetic appeal.

The A.O. Smith 1700 model caters specifically to smaller residential needs but retains features that align with higher-end models. It incorporates state-of-the-art safety features, including overheat protection and a pressure relief valve. Its lightweight structure and ease of installation stand out, making it a recommended choice for those looking for efficient heating without extensive modifications to their plumbing systems.

Lastly, the A.O. Smith 3400 is a powerhouse designed for larger commercial applications. This model offers exceptional heating capacities and includes advanced technologies such as a digital display for easy monitoring and control. The robust build is complemented by a high-performance insulation system that significantly reduces energy consumption and operating costs.

All A.O. Smith water heaters, including the 2600, 2000, 1700, and 3400 models, feature corrosion-resistant materials ensuring longevity and durability. With their commitment to quality and innovation, A.O. Smith continues to provide water heating solutions that meet modern demands while emphasizing energy efficiency and user convenience. Whether for residential or commercial use, each model represents the pinnacle of reliability and performance in water heating technology.

In conclusion, A.O. Smith has established itself as a reliable choice for water heaters, with models that cater to diverse needs without compromising on efficiency or quality.
Top Page Image Contents