81
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 17 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 sup-
ply 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 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 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 circulator.
(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 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 on boiler circulator. (See
Piping Details in this manual.)
4. Troubleshoot thermistor by following steps in
F02
.
Summary of Contents for EL-110
Page 15: ...15 Figure 3 ...
Page 61: ...61 Figure 29 ...
Page 62: ...62 Figure 30 ...
Page 87: ...87 Figure 33 ...
Page 88: ...88 Figure 34 ...
Page 89: ...89 Figure 35 LP 293 A NOTE Parts listed on the following page ...
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Page 96: ...96 MAINTENANCE NOTES ...