Westinghouse 220VWH Manual page 51

SUPPLY HIGH F05
PUMP ON TIME
RETURN TEMP HIGH F06
PUMP ON TIME
NO FLAME ON IGN F09
PUMP ON TIME
FLAME LOSS F10
PUMP ON TIME
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
repairs the cause of excessive temperature
and pushes RESET on the display.
If the FAULT light is not illuminated and
this message is displayed, the supply
temperature of the boiler is at or above
o
210 F. The message will clear automatically
when the temperature drops below 194
During 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
o
has exceeded 230 F and a serious safety
issue exists. The boiler will not restart until a
technician determines and repairs the cause
of excessive temperature and pushes RESET
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 F. The message will clear automatically
when the temperature drops below 194
During the time that this message or lockout
fault is displayed, the pump will be on.
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
the display. The boiler will not restart until a
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
flashing on the display. The boiler will not
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.
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 dual supply thermistor by following
steps in F02.
o
F.
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.
1. Watch the igniter through the observation window.
2. If there is no spark, check the spark electrode for the
proper 1/4" gap between the burner.
3. Remove any corrosion from the spark electrode.
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 current.
6. Check any flue blockage or condensate blocks.
7. Replace the ignitor.
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 ignition.
4. Check the FLAME signal on the display. It should be
above 2.5uA when the boiler is firing.
5. If the signal reads less than 2.5uA, clean the spark
probe.
6. If the problem persists and the 'FLAME" signal is still
less than 2.5uA, replace the 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.
WHL-053 Rev. 00 Rel. 003 Date 7.21.17
51