Westinghouse Premium WBCMC 1000 Series Installation Manual page 51

F02 indicates the supply temperature sensor
of the boiler has failed. The boiler will not
restart until a technician replaces the sensor
SUPPLY SENSOR F02 and pushes RESET on the display. This is
PUMP ON a serious safety issue as indicated by the
illuminated red light and the word LOCKOUT
flashing on the display. During this lockout
fault, the pump will be on.
F03 indicates the return temperature sensor
of the boiler has failed. The boiler will not
restart until a technician replaces the sensor
and pushes RESET on the display. This is
RETURN SENSOR F03
PUMP ON a serious safety issue as indicated by the
illuminated red light and the word LOCKOUT
flashing on the display. During this lockout
fault, the pump will be on.
F04 indicates that the flue temperature
sensor of the boiler has failed. The boiler will
not restart until a technician replaces the
sensor and pushes RESET on the display.
FLUE SENSOR F04
PUMP ON This is a serious safety issue as indicated
by the illuminated red light and the word
LOCKOUT flashing on the display. During this
lockout fault, the pump will be on.
Screen
F05 indicates the boiler supply temperature
is excessive. When accompanied by the
red FAULT light and LOCKOUT flashing on
the display, this code indicates the supply
sensor temperature has exceeded 230
a serious safety issue exists. The boiler will
not restart until a technician determines and
SUPPLY TEMP HIGH F05 repairs the cause of excessive temperature
and pushes RESET on the display.
PUMP ON
If the FAULT light is not illuminated and
this message is displayed, the supply tem-
perature of the boiler is at or above 210
The message will clear automatically when
the temperature drops below 194
the time that this fault is displayed, the
pump will be on.
This display indicates that the boiler
return temperature is excessive. When
accompanied by the red FAULT light and
LOCKOUT flashing on the display, this code
indicates that the return sensor temperature
has exceeded 230
issue exists. The boiler will not restart until a
technician determines and repairs the cause
RETURN TEMP HIGH F06
of excessive temperature and pushes RESET
PUMP ON
on the display.
If the red FAULT light is not illuminated and
this message is displayed, then the return
temperature of the boiler is at or above
o
210
when the temperature drops below 194
During the time that this message or lockout
fault is displayed, the pump will be on.
Description
o
o
F and a serious safety
F. The message will clear automatically
1. Check the electrical connection to the thermistor on the outlet
manifold. Verify 5 VDC by checking the Molex connector. If there is
no 5 VDC, check the harness. If harness is OK, replace the control.
Verify thermistor values by referencing chart in this manual.
2. Replace thermistor if necessary.
NOTE: The boiler will reset automatically once the fault is
corrected.
1. Check circulator pump operation.
2. Ensure adequate flow through the boiler by accessing the
status menu and determining there is less than a 50
the return thermistor to the supply thermistor.
3. Troubleshoot thermistor by following the steps in F02.
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 sensor resistance table in this manual. The
temperature on the chart should be close to the temperature in
the flue. If not, replace the flue sensor.
o
F and
1. Check circulator pump operation.
2. Ensure adequate flow through the boiler by accessing the
status menu and determining 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.
o
F.
F. During
1. Check circulator pump operation.
2. Ensure adequate flow through the boiler by accessing the
status menu and determining 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.
o
F.
Possible Remedy
whl-428-r1 Rev. 001 Rel. 012 Date 7.21.20
51
o
F rise from