Bradford White UPV Series Service Manual page 13

LED Status Control Status
Six-one flash,
Failed to light pilot.
three second
System auto resets.
pause
Pressure switch or
Six-two flash, blower temp switch
three second
pause burner operation.
System auto resets.
Six-three flash,
three second
pause System auto resets.
Six-four flash, Undesired-false pilot
three second
pause System auto resets.
Flammable vapor
Seven flash,
sensor or resettable
three second
thermal switch fault
pause
Eight-one flash, Flammable vapor
three second
pause.
Eight-two flash,
Temperature sensor
three second
pause.
Eight-three flash,
three second electronics fault
pause.
Eight-four flash,
Gas valve fault
three second
pause.
1. Unstable pilot.
2. Pilot tube blocked or restricted.
3. Oxidation build up on pilot electrode.
4. Wire damage to pilot assembly or
bad connection at gas valve.
1. Vent blockage or improper vent
configuration.
2. Pressure switch tubing kinked or
blocked.
3. Faulty pressure switch.
opened during 4. Vent termination being affected by
wind.
5. Blower not spinning up to speed.
6. Blower temp or exhaust temp too
high.
7. Faulty blower temperature switch.
1. Unstable pilot.
2. Pilot tube blocked or restricted.
3. Oxidation build up on pilot
Pilot flame
extinguished. 4. Wire damage to pilot assembly or a
5. Insufficient combustion air.
6. Gas pressure is out of
flame sensed. Pilot valve stuck in open position.
1. Flammable vapor present
2. Flammable vapor sensor exposed
3. Flammable vapor sensor exposed
detected.
4. Resettable thermal switch open
Flammable vapor sensor or simulated
sensor out of
resistive device out of specification.
specification.
1. Damage to temperature sensor
wire.
fault. 2. Temperature sensor resistance out
of range.
Gas valve 1. Control needs to be reset.
2. Control is wet or physically
detected. damaged.
1. Control needs to be reset.
2. Control is wet or physically
detected.
damaged.
Probable Cause
electrode.
bad connection at gas valve.
specification.
to excessive moisture
to extreme ambient temperature
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Service Procedure
Page 16.
1. Check vent or vent
tables.
2 & 3 Page 18.
4. Refer to venting
section of installation
manual.
5. Page 19.
6 & 7. Page 23.
1-4. Page 16.
5. Refer to installation
manual.
6. Page 27.
Replace gas control,
page 27.
1-3. Flammable sensor
testing, page 28.
4. Resettable thermal
switch testing, page 37.
Page 28.
Replace gas control,
page 27.
1. Interrupt power supply.
2. Replace gas control,
page 27.
1. Interrupt power supply.
2. Replace gas control,
page 27.
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