A.O. Smith BTF-75 warranty Troubleshooting with the LED, Off, Flash

Page 18

TROUBLESHOOTING WITH THE LED

 

LED STATUS

INDICATES

 

CHECK/REPAIR

 

OFF

No power to system control.

 

1.

Appliance On/Off switch in the Off position.

 

 

 

 

2.

Line voltage input power at L1 and L2 connectors.

 

 

 

 

3.

System wiring harness in good condition and securely

 

 

 

 

 

connected at both ends.

 

 

 

 

 

 

BRITE - DM

Normal Operation

 

Not Applicable.

 

 

 

 

 

 

 

This indication shows whenever the system is

 

 

 

 

 

powered, unless some abnormal event has occurred.

 

 

 

 

 

 

 

 

 

 

1 FLASH

Setpoint error, internal failure detected.

 

1.

Replace control.

 

 

 

 

 

 

 

 

 

 

 

Airflow proving switch remains open longer than

 

1.

Airflow proving switch stuck closed.

 

 

30 seconds after a call for heat begins.

 

2.

Airflow proving switch mis-wired or jumpered.

 

2 FLASHES

 

 

 

 

 

 

Combustion air blower is not energized

 

 

WARNING

 

 

until airflow proving switch opens.

 

 

Line Voltage Hazard.

 

 

 

 

 

Can cause property damage, severe injury or

 

 

 

 

 

death.

 

 

 

 

 

Turn off appliance before coming in contact with

 

 

 

 

 

pressure switch and/or electrical connections.

 

 

 

 

 

 

 

3 FLASHES

Airflow proving switch remains open longer than

 

1.

Airflow proving switch operation, tubing and wiring.

 

 

30 seconds after combustion air blower energized.

 

2.

Obstructions or restrictions in appliance air intake

 

 

 

 

 

or exhaust flue system that prevent proper combustion

 

 

System goes into 5 minute delay period, with

 

 

air flow.

 

 

combustion air blower off. At the end of the

 

 

 

 

 

5 minute delay, another ignition cycle will begin.

 

 

WARNING

 

 

 

 

 

Line Voltage Hazard.

 

 

 

 

 

Can cause property damage, severe injury or

 

 

 

 

 

death.

 

 

 

 

 

Turn off appliance before coming in contact with

 

 

 

 

 

pressure switch and/or electrical connections.

 

 

 

 

 

 

 

 

Thermal Cutoff open.

 

1.

Replace Control.

 

4 FLASHES

Combustion air blower is energized.

 

 

 

 

 

Internal hardware failure.

 

 

 

 

 

 

 

 

 

 

 

Flame signal sensed out of proper sequence.

 

1.

Flame at main burner.

 

5 FLASHES

Combustion air blower is energized.

 

2.

Replace control.

 

 

 

 

 

 

 

 

System Lockout.

 

1.

Gas supply off or at too low pressure to operate.

 

 

 

 

2.

Damaged or broken HSI element.

 

6 FLASHES

After 1 hour lockout reset delay, control will reset

 

3.

Appliance not properly earth grounded.

 

 

and initiate a new ignition sequence if the call for

 

4.

Flame sense rod contaminated or in incorrect location.

 

 

heat is still present.

 

5.

HSI element located incorrect position.

 

 

 

 

6.

HSI element or flame sense rod wiring in good

 

 

 

 

 

condition and properly connected.

 

 

 

 

7.

Less than 100 Vac between flame rod and burner

 

 

 

 

 

pan with 120 Vac input to control.

 

 

 

 

8.

Cycle external power or remove request for heat for

 

 

 

 

 

2 seconds and reapply.

 

 

 

 

 

 

18

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Contents Commercial GAS, GLASS-LINED, TANK-TYPE Water Heater SmartValve is a Registered Trademark of Honeywell IncRecovery Capacities ROUGH-IN-DIMENSIONSALL Dimensions in Inches ForewordTable of Contents General Safety InformationInstallation Confined Space AIR RequirementsUnconfined Space Water ConnectionsRelief Valve Single TemperatureClosed Water System Venting Vent Pipe TerminationPlanning the Vent System If using 3 inch vent pipeIf using 4 inch vent pipe Number Maximum Elbows Pipe FeetInstallation of Sidewall Vent System Vent Terminal INSTALLATION, SidewallPreparation of Blower Assembly Power Vent Wiring Schematic Figure Vent Pipe Preparation Installation of Vent SYSTEM, SidewallInstallation of Vertical Vent System Initial PreparationMaking the Joint PrimerCement Step aConnection of GAS Pipe OperationGAS Connections To Operate the HeaterWhat to do if YOU Smell GAS WatertemperatureadjustmentDo not TRY to Light the Burner by Hand Do not TRY to Light the Burner by HandWater Temperature Adjusting Dial MaintenanceTemperature Regulation PurgingVenting System High Temperature CUT-OFF SwitchPower Venter Maintenance ValveCondensation Service and RepairTrouble Shooting Cathodic PROTECTION-ANODEAbove 170 F TroubleshootingVent Pipe TOO HOT Yellow FlameTroubleshooting with the LED OFFFlash Turn on GAS Supply Plug Check for Proper Voltage ATYES Replace HSITank Service and Repair ExpensesClaim Procedure ALL Other Parts