Bradford White RG2F40S6N Atmospheric Fan Assist Gas Quick Service Guide

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Bradford White RG2F40S6N Atmospheric Fan Assist Gas Quick Service Guide
Power Vent, Power Direct Vent,
& Fan Assisted Water Heaters - ICON
Error Code
Definition
Service Action
Possible Parts Needed
No LED
No power to the unit or switch is off
Turn power on
Verify 120 volts present at outlet
None
One short flash every four 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
Check continuity on flame sensor
1) Pilot assembly
2) Gas valve
Two flashes three second pause
Pressure switch not working - closed position
Inspect pressure switch tubing and ports
Bypass pressure switch & temp switch for testing
Measure vacuum on pressure switch
1) Pressure switch
2) Temp switch
Three flashes three second pause
Pressure switch or temp switch stuck open
Check vent for blockage
Verify blower spinning up to speed
Measure vacuum on pressure switch
Inspect pressure switch tubing and ports
Bypass pressure switch & temp switch for testing
1) Pressure switch
2) Temp switch
3) Blower assembly
4) Gas valve
Four flashes three second pause
High tank temperature
Check temp probe ohms compare with sensor temp chart
1) Thermowell
2) Gas valve
Five flashes three second pause
Check for flame sensor short to ground
Gas valve stuck open - replace valve
1) Pilot assembly
2) Gas valve
Six flashes Pilot failed to light
one flash, three second pause Inspect and clean pilot
Verify gas flow
Check connection at gas valve
1) Pilot assembly
2) Gas valve
Six flashes Pressure switch or
two flashes, three second pause
temp switch opened during operation
Check vent for blockage
Measure vacuum on pressure switch
Verify blower spinning up to speed
Bypass pressure switch & temp switch for testing
1) Pressure switch
2) Temp switch
3) Blower assembly
Six flashes Pilot flame extinguished
three flashes, three second pause Inspect and clean pilot
Check connection at gas valve
1) Pilot assembly
2) Gas valve
Six flashes four flashes, three second pause
Check for flame sensor short to ground
Gas valve stuck open - replace valve
1) Pilot assembly
2) Gas valve
Seven flashes
Flammable vapor sensor/simulated
resistive device fault
Verify resistance is between 3.0 - 48 KOhms
Verify no flammable vapors present
Check sensor harness
1) Flammable vapor sensor
2) Harness
Eight flashes Flammable vapor sensor out of spec,
one flash, three second pause
possible short
Verify resistance is between 3.0 - 48 KOhms
Verify no flammable vapors present
Check sensor harness
1) Flammable vapor sensor
2) Harness
3) Gas valve
Eight flashes Thermowell sensor damaged or unplugged
two flashes, three second pause Check temp probe ohms compare with sensor temp chart
1) Gas valve
Eight flashes Gas valve electronics fault
three flashes, three second pause Reset gas valve;
if problem persists replace gas valve
1) Gas valve
Eight flashes Gas valve fault detected
four flashes, three second pause Reset gas valve;
if problem persists replace gas valve
1) Gas valve
False pilot flame sensed
Pilot valve stuck open
False pilot flame sensed
Pilot valve stuck open
NOTE: Check all wire connections
Check gas inlet and manifold gas pressure
Check for grounding connections
Technical Support
800-334-3393
www.bradfordwhite.com
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