WHL-033 Rev. 1.29.16
56
FLAP CLOSED F15
Flapper valve physically stuck closed.
1. Check flue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of flapper valve.
4. Check wiring between valve and controller.
5. Replace valve-flapper.
FLAP OPEN F16
Flapper valve physically stuck open.
1. Check flue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of flapper valve.
4. Check wiring between valve and controller.
5. Replace valve-flapper.
CONDENSATE FULL F20
PUMP OFF
The condensate trap is full. 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
and pushes
RESET
on the display. During this
lockout fault, the pump will be off.
1. Check condensate lines for obstructions.
2. Check float switch in condensate reservoir.
3. Check wiring from condensate reservoir to 926 control
and repair as necessary.
Screen
Description
Possible Remedy
PROGRAM ERROR F31
PUMP OFF
There was an error while programming
the control and the memory is corrupt. The
boiler control will not function in this state
and the pump will be off as indicated on
the bottom line. This error only occurs if a
technician is programming the control and
the programming function fails. The only way
to recover from this error is to reprogram the
control. If this error occurs at any time other
than when a technician is servicing the boiler,
the control has failed and must be replaced
by a qualified technician.
The control must be reprogrammed. If programming
does not solve the problem, the control must be replaced.
CONTROL PROGRAMED PP
The control has been programmed by a
technician or the factory. After programming,
the control is left in a locked out mode.
Press
RESET
for at least 1 second to use the control.
OUTDOOR SENSOR FOU
PUMP ON 1:45P
There is an issue with the outdoor sensor. It
is shorted, damaged, or disconnected from
the boiler.
1. Check outdoor sensor connections and wiring. Ensure
the sensor and wiring are intact and that the sensor is
connected to the boiler.
2. Check the outdoor sensor resistance with an ohmmeter.
See Table 26 for correct outdoor sensor resistance.
3. Replace the outdoor sensor.
The following blocking codes will block operation until the control determines the situation safe for boiler operation.
FLUE TEMP HIGH E07
PUMP OFF TIME
E07 indicates the flue sensor temperature
is excessive and above 210
o
F. When E07 is
displayed the boiler will not respond to a
demand for heat. When the flue temperature
decreases below 194
o
F, the display will return
to normal and allow the boiler to respond to
a heat demand. The bottom line indicates the
status of the pump. The pump will remain off
when this error is displayed.
Check the flue for obstructions and any sign of damage,
especially signs of excessive heat. Repair as necessary.
Run the boiler and check the flue temperature with an
external thermometer. If the flue temperature on the
thermometer does not agree with the flue temperature
displayed in the status menu, inspect the wiring to
the flue temperature sensor in the boiler and repair as
necessary. If the wiring is intact replace the flue sensor. If
the flue temperature is excessive on the status menu and
the test thermometer reads the same, check and adjust
combustion controls on the boiler. If the problem persists,
inspect the target wall in the combustion chamber and
replace it if cracked or damaged.
COMMON FLUE BLOCK
E16
Common flue blocking or flapper valve
feedback failure.
1. Ensure boiler is properly programmed.
2. Check flue system for obstructions.
3. Check proper communication between boilers.
4. Check operation of flapper valve.
5. Check wiring between valve and controller.
6. Replace valve-flapper.
Summary of Contents for WBMC**500
Page 36: ...WHL 033 Rev 1 29 16 36 Figure 27 Internal Connection Diagram ...
Page 59: ...WHL 033 Rev 1 29 16 59 Figure 32 500 Combustion System Replacement Parts Model ...
Page 60: ...WHL 033 Rev 1 29 16 60 Figure 33 850 Combustion System Replacement Parts Model ...
Page 61: ...WHL 033 Rev 1 29 16 61 Figure 34 Water Side Replacement Parts All Models ...
Page 62: ...WHL 033 Rev 1 29 16 62 Figure 35 Cabinet Replacement Parts All Models ...
