Bradford White D-80T-725-3X - Manual

ICON - Power Vent and Power Direct Vent
Water Heaters
ERROR CODE DEFINITION SERVICE ACTION POSSIBLE PARTS NEEDED
No LED No power to the unit or switch is off Turn power on None
Verify 120 volts present at outlet
One short flash every 4 seconds Standby mode/unit up to temp None None
Bright/dim alternating LED Thermostat calling for heat None None
Short flash once every second Weak pilot signal on last call for heat Inspect and clean pilot assembly 1) Pilot assembly
Check continuity on flame sensor 2) Gas valve
Two flashes three second pause Pressure switch not working - closed position Inspect pressure switch tubing and ports 1) Pressure switch
Bypass pressure switch 2) Temp switch
& temp switch for testing
Measure vacuum on pressure switch
Three Flashes three second pause Pressure switch or temp switch stuck open Check vent for blockage 1)Pressure switch
Verify blower spinning up to speed 2) Temp switch
Measure vacuum on pressure switch 3) Blower assembly
Inspect pressure switch tubing and ports 4) Gas valve
Bypass pressure switch
& temp switch for testing
Four flashes three second pause High tank temperature Check temp probe ohms - 1) Thermowell
compare with sensor temp chart 2) Gas valve
Five flashes three second pause False pilot flame sensed/pilot valve stuck open Check for flame sensor short to ground 1) Pilot assembly
Gas valve stuck open - replace valve 2) Gas valve
Six flashes - Pilot failed to light Inspect and clean pilot, 1) Pilot assembly
one flash, three second pause Check connection at gas valve
Verify gas flow
2) Gas valve
Six flashes - Pressure switch or temp switch Check vent for blockage 1) Pressure switch
two flashes, three second pause opened during operation Measure vacuum on pressure switch 2) Temp switch
Verify blower spinning up to speed 3) Blower assembly
Bypass pressure switch
& temp switch for testing
Six flashes - Pilot flame extinguished Inspect and clean pilot 1) Pilot assembly
three flashes, three second pause Check connection at gas valve 2) Gas valve
Six flashes - False pilot flame sensed/pilot valve stuck open Check for flame sensor short to ground 1) Pilot assembly
four flashes, three second pause Verify gas valve stuck open - replace valve 2) Gas valve
Seven flashes Flammable vapor sensor fault Verify resistance is between 3.0 - 4.8 KOhms 1) Flammable vapor sensor
Verify no flammable vapors present
2) Harness
Check sensor harness
Eight flashes - Flammable vapor sensor out of spec, possible short Verify resistance is between 3.0 - 4.8 KOhms 1) Flammable vapor sensor
one flash, three second pause Verify no flammable vapors present 2) Harness
Check sensor harness 3) Gas valve
Eight flashes - Thermowell sensor damaged or unplugged Check temp probe ohms - 1) Thermowell
two flashes, three second pause compare with sensor temp chart 2) Gas valve
Eight flashes - Gas valve electronics fault Reset gas valve, If problem persists 1) Gas valve
three flashes, three second pause replace gas valve
Eight flashes - Gas valve fault detected Reset gas valve, If problem persists 1) Gas valve
four flashes, three second pause replace gas valve
NOTE: Check all wire connections
Check gas inlet and manifold gas pressure
Check for grounding connections
Technical Support
800-334-3393