HTP EL-110, Installation Manual, Page: 82 / 97

82
Fault Code F09
NO FLAME ON IGN F09
PUMP ON
The boiler tried to ignite four times during one heat
call and failed. The red FAULT light and LOCKOUT
will flash on the display. This code indicates a seri-
ous safety issue. The boiler will not restart until the
cause of ignition failure is repaired by a technician
and he pushes the RESET button on the display.
During this lockout fault, the pump will remain on as
indicated on the second line of the display.
1. Watch the igniter through the observation window
provided.
2. If there is no spark, check the spark electrode for
the proper .196” (5.0 mm ± 1mm) gap.
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.
Fault Code F10
FLAME LOSS F10
The flame was lost while the boiler was firing 3 times
during 1 demand call. The red light will display and
the word LOCKOUT will flash. This code indicates a
serious safety issue. The boiler will not restart until
the cause of flame loss is determined by a tech-
nician and he pushes the RESET button on the
display. During this lockout fault, the pump will be on
as indicated on the second line of the display.
1. Monitor the gas pressure to the boiler while in
operation.
2. Assure that the flame is stable when lit.
3. Check to see if the display readout changes from
“GAS VALVE ON” to “RUN” within a few seconds
after the boiler ignites.
4. Check the FLAME signal on the status 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.
Fault Code F11
FALSE FLAME SIG F11
PUMP ON
There is flame when the control is not telling the
boiler to run. The red light will display and the word
LOCKOUT will flash. This code indicates a serious
safety issue. The boiler will not restart until the
cause is determined by a technician and he pushes
the RESET button on the display. During this lockout
fault, the pump will be on as indicated on the second
line of the display.
1. Look into window. If there is flame, turn the gas off
to the boiler 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
igniter and the flame rectification probe.
3. If the flame return sensor is not present after
turning off the gas supply, check the gas valve elec-
trical connection.
4. Repair condensate system as necessary. If
condensate has backed up and 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 conduct the signal to ground, giving a false
reading.
Figure 31