HTP EL-399 - Manual (Page 69)

69
LP- 293 REV. 5.20.14
Fault Code F03
RETURN SENSOR F03
PUMP ON
This display indicates that the return temperature
sensor of the boiler has failed. This code indicates
a serious safety issue and the boiler will not
restart until the sensor is replaced by a technician
and he pushes the RESET button on the display.
This situation is indicated by the red light on the
display and the word LOCKOUT flashing on the
display. During this lockout fault, the pump will be
on as indicated on the second line of the display. 1. Check circulator pump operation.
2. Assure that there is adequate flow through the
boiler by accessing the status menu and assuring
that there is less than a 50°F rise from the return
thermistor to the supply thermistor.
3. Troubleshoot thermistor by following steps in
F02 .
Fault Code F04
FLUE SENSOR F04
PUMP ON
This display indicates that the flue temperature
sensor of the boiler has failed. This is a serious
safety issue. The boiler will not restart until the
sensor is replaced by a technician and he pushes
the RESET button on the display. This situation is
indicated by the red light and the flashing word
LOCKOUT on the display. During this lockout
fault, the pump will be on as indicated on the
second line of the display. Inspect the flue sensor for physical damage or
corrosion and replace it if necessary. Check the
electrical connection to the flue sensor and repair
as necessary. Measure the resistance of the
sensor and refer to the chart in Table 28 of this
manual. The temperature on the chart should be
close to the same as the temperature in the flue. If
not, replace the flue sensor.
Fault Code F05
SUPPLY TEMP HIGH F05
PUMP ON
This display indicates that the supply temperature
of the boiler is excessive. If accompanied by the
red FAULT light and LOCKOUT flashing on the
display, this code indicates that the temperature
on the supply sensor has exceeded 230
o F and a
serious safety issue exists. The boiler will not
restart until the cause of excessive temperature is
repaired by a technician and the RESET button is
pushed on the display.
If the FAULT light is not illuminated and this
message is displayed, then the supply tem-
perature of the boiler is at or above 210
o F. The
message will clear automatically when the
temperature drops below 194
o F. During the time
that this message or lockout fault is displayed, the
pump will be on as indicated on the second line.
1. Check circulator pump operation.
2. Assure that there is adequate flow through the
boiler by accessing the status menu and assuring
that there is less than a 50°F rise from the return
thermistor to the supply thermistor.
3. Check the direction of flow off the boiler cir-
culator. (See Piping Details in this manual.)
4. Troubleshoot the thermistor by following steps in
F02 .
Fault Code F06
RETURN TEMP HIGH F06
PUMP ON
This display indicates that the return temperature
of the boiler is excessive. If accompanied by the
red FAULT light and LOCKOUT flashing on the
display, the return sensor temperature has
exceeded 230
o F and a serious safety issue exists.
The boiler will not restart until the cause of
excessive temperature is repaired by a technician
and the boiler is RESET.
If the red FAULT light is not illuminated, then the
return temperature of the boiler is at or above
210
o F. The message will clear automatically when
the temperature drops below 194 o F. During the
time that this message or lockout fault is dis-
played, the pump will be on as indicated on the
second line.
1. Check circulator pump operation.
2. Assure that there is adequate flow through the
boiler by accessing the status menu and assuring
that there is less than a 50°F rise from the return
thermistor to the supply thermistor.
3. Check the direction of flow on boiler circulator.
(See Piping Details in this manual.)
4. Troubleshoot thermistor by following steps in
F02 .
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 serious 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.