Bradford White PV Series Service Manual page 15

PV Series
PV Series
Observe green LED indicator on
electronic gas control. Error flash codes
are displayed with a three second pause
before repeating. Check and repair the
Observe green LED indicator on
system as noted in the troubleshooting
electronic gas control. Error flash codes
table below.
are displayed with a three second pause
before repeating. Check and repair the
system as noted in the troubleshooting
table below.
LED Status Control Status
None, control
No electrical
LED not on or
power
flashing
LED Status Control Status
Stand-by mode,
Short flash, once
every four
Waiting for call
None, control
No electrical
seconds
for heat (no fault).
LED not on or
power
Thermostat
flashing "Heartbeat"
alternates calling
Stand-by mode,
Short flash, once
bright/dim
every four
for heat (no fault).
Waiting for call
seconds
for heat (no fault).
Thermostat
"Heartbeat"
Weak pilot signal
Short flash once
alternates calling
on last call for
per second
bright/dim
heat.
for heat (no fault).
Weak pilot signal
Pressure switch
Short flash once
Two flash, three
on last call for
not working-
per second
second pause
heat.
closed position.
Pressure switch
Pressure switch
Two flash, three
not working-
Three flash, or blower temp.
second pause
closed position.
three second switch not
pause working -open
position.
Pressure switch
Three flash, or blower temp.
three second switch not
Excessive tank
pause working -open
Four flash, three temperature.
position.
second pause
System must be
reset.
Undesired-false
Excessive tank
Five flash, three
pilot flame
Four flash, three temperature.
second pause
present.
second pause
System must be
reset.
Undesired-false
Five flash, three
pilot flame
second pause
present.
Probable Cause
Control power switch in "OFF" position.
Supply voltage interrupted.
Probable Cause
Temperature demand is satisfied
Control power switch in "OFF" position.
Supply voltage interrupted.
Tank temperature below set point of
thermostat.
Temperature demand is satisfied
1. Unstable pilot.
2. Pilot tube block or restricted.
Tank temperature below set point of
3. Oxidation build up on pilot electrode.
thermostat.
4. Wire damage to pilot assembly or bad
1. Unstable pilot.
connection at gas valve.
2. Pilot tube block or restricted.
1. Pressure switch tubing kinked or blocked.
3. Oxidation build up on pilot electrode.
2. Blocked pressure tap on switch or blower.
4. Wire damage to pilot assembly or bad
3. Faulty pressure switch.
1. Vent blockage or improper vent
connection at gas valve.
1. Pressure switch tubing kinked or blocked.
configuration.
2. Blocked pressure tap on switch or blower.
2. Pressure switch tubing kinked or blocked.
3. Faulty pressure switch.
3. Faulty pressure switch.
1. Vent blockage or improper vent
4. Blower not spinning up to speed.
configuration.
5. Blower temp or exhaust temp too high.
2. Pressure switch tubing kinked or blocked.
6. Faulty blower temperature switch.
3. Faulty pressure switch.
1. Temperature sensor out of calibration.
4. Blower not spinning up to speed.
2. Faulty gas control.
5. Blower temp or exhaust temp too high.
3. Plumbing leak.
6. Faulty blower temperature switch.
1. Temperature sensor out of calibration.
1. Pilot valve stuck in open position.
2. Faulty gas control.
3. Plumbing leak.
1. Pilot valve stuck in open position.
Troubleshooting
Service
Procedure
Turn power on
Service
Procedure
Normal operation.
Adjust thermostat to
temp level.
Turn power on
Normal operation.
Normal operation. Adjust thermostat to
temp level.
Adjust thermostat to
temp level.
Normal operation.
Adjust thermostat to
Page 19
temp level.
Page 19
Page 20
1. Check vent or vent
tables.
Page 20
2 & 3 Page 20
1. Check vent or vent
4. Page 22
tables.
5 & 6 Page 24
2 & 3 Page 20
1. Page 25
4. Page 22
2. Replace gas control,
page 31
5 & 6 Page 24
1. Page 25
Replace gas control,
page 31
2. Replace gas control,
page 31
15
Replace gas control,
page 31
15
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