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52
The boiler tried to ignite four times during
one heat call and failed. This is a serious
safety issue as indicated by the illuminated
red light and the word LOCKOUT flashing on
NO FLAME ON IGN F09
the display. The boiler will not restart until a
PUMP ON
technician determines and repairs the cause
of ignition failure and pushes RESET on the
display. During this lockout fault, the pump
will remain on.
The flame was lost 3 times while the boiler
was firing during 1 demand call. This is a
serious safety issue as indicated by the
illuminated red light and the word LOCKOUT
FLAME LOSS
F10
flashing on the display. The boiler will not
PUMP ON
restart until a technician determines and
repairs the cause of flame loss and pushes
RESET on the display. During this lockout
fault, the pump will be on.
There is flame when the control is not telling
the boiler to run. This is a serious safety issue
as indicated by the illuminated red light and
FALSE FLAME SIG F11
the word LOCKOUT flashing on the display.
PUMP ON
The boiler will not restart until a technician
determines and repairs the cause and
pushes RESET on the display. During this
lockout fault, the pump will be on.
The fan is not running at the speed
determined by the control. Fan speed has
been more than 30% faster or slower than
the commanded speed for more than 10
seconds. This is a serious safety issue as
FAN SPEED ERROR F13
indicated by the illuminated red light and
PUMP ON
the word LOCKOUT flashing on the display
.This boiler will not restart until a technician
determines and repairs the cause and
pushes RESET on the display. During this
lockout fault, the pump will be on.
whl-428-r1 Rev. 001 Rel. 012 Date 7.21.20
1. Watch the igniter through the observation window.
2. If there is no spark, check the spark electrode for the proper
.196" (5.0 mm ± 1mm) gap. See below.
3. Remove any corrosion from the spark electrode and flame
rectifier probe.
4. If there is a spark but no flame, check the gas supply to the
boiler.
5. If there is a flame, check the flame sensor.
6. Check any flue blockage or condensate blocks.
1. Monitor gas pressure to the unit while in operation.
2. Assure the flame is stable when lit.
3. Check if the display readout changes from "GAS VALVE ON" to
"RUN" within a few seconds of boiler ignites.
4. Check the FLAME signal on the display. It should be above 1.0
when the boiler is firing.
5. If the signal reads less than 1 microampere, clean the flame
rectifier and spark probe.
6. If the problem persists and the 'FLAME" signal is still less than
1.0, replace the flame probe and spark igniter probe.
7. The flame signal should be steady after the boiler has been
firing for 1 minute and is normally at 5.0 to 9.0. If the flame signal
is not steady, disassemble the burner door and check the burner
and its sealing gaskets.
1. Look into window. If there is flame, turn the gas off to the unit at
the service valve and replace the gas valve.
2. If the flame signal on the status menu is greater than 1.0 when
the burner is not lit, replace the spark ignitor and the flame
rectification probe.
3. If the flame signal is not present after turning off the gas supply,
check the gas valve electrical connection.
4. Check for condensate backup. Repair condensate system
as necessary. If condensate has partially filled the combustion
chamber, the refractory wall may be damaged and should be
replaced.
5. Turn the gas on at the service valve after corrective action is
taken.
6. If the refractory wall falls against the rectifier probe, it may con-
duct the signal to ground, giving a false reading.
1. Check the combustion fan wiring.
2. Measure DC voltage from the red fan wire to ground while it is
connected to the fan. It should be between 24 and 40 volts. If it is
lower than 24 volts, check for excessive external loads connected
to the boiler sensor terminals
3. Disconnect the 5 pin plug from the fan and check the voltage
on the red wire again. If it is now between 24-40 volts, replace the
fan. If it is still below 24 volts replace the boiler control board.
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