LP-428 Rev. 6.6.16
54
FLAP CLOSED F15 Flapper valve physically stuck closed.
1. Check ue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of apper valve.
4. Check wiring between valve and controller.
5. Replace valve-apper.
FLAP OPEN F16 Flapper valve physically stuck open.
1. Check ue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of apper valve.
4. Check wiring between valve and controller.
5. Replace valve-apper.
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 ashing 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 o.
1. Check condensate lines for obstructions.
2. Check oat 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 o 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 qualied 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 25 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 ue 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 ue 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 o
when this error is displayed.
Check the ue for obstructions and any sign of damage, especially
signs of excessive heat. Repair as necessary. Run the boiler and
check the ue temperature with an external thermometer. If
the ue temperature on the thermometer does not agree with
the ue temperature displayed in the status menu, inspect the
wiring to the ue temperature sensor in the boiler and repair as
necessary. If the wiring is intact replace the ue sensor. If the
ue 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 ue blocking or apper valve
feedback failure.
1. Ensure boiler is properly programmed.
2. Check ue system for obstructions.
3. Check proper communication between boilers.
4. Check operation of apper valve.
5. Check wiring between valve and controller.
6. Replace valve-apper.
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