HTP EFT-155 - Page 61

LP-387 Rev. 7.3.15
61
FAN SPEED ERROR F13
PUMP ON
The fan is not running at the speed
determined by the control. Fan speed has
been more than 30% faster or slower than
the commanded speed for more than 10
seconds. This is a serious safety issue as
indicated by the illuminated red light and
the word LOCKOUT ashing on the display
.This 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 on.
1. Check the combustion fan wiring.
2. Measure DC voltage from the red fan wire to ground
while it is connected to the fan. It should be between 24
and 40 volts. If it is lower than 24 volts, check for excessive
external loads connected to the boiler sensor terminals
3. Disconnect the 5 pin plug from the fan and check the
voltage on the red wire again. If it is now between 24-40
volts, replace the fan. If it is still below 24 volts replace the
boiler control board.
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.
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 qualied 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
FOU indicates 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 27 for correct outdoor sensor resistance.
3. Replace the outdoor sensor.
NOTE: If an outdoor sensor IS NOT used in the installation, enter the System Setting Program Navigation, go to Function 21, and turn the
setting from ON to OFF.
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.
LINE VOLTAGE E19
PUMP OFF
E19 indicates the line voltage frequency is
out of range. This could happen if the boiler
is being powered from a small gasoline
powered generator that is overloaded or not
functioning correctly.
Inspect power wiring to the boiler and repair as necessary.
If connected to line voltage, notify the power company.
If connected to an alternate power source such as
a generator or inverter, make sure the line voltage
frequency supplied by the device is 60 Hz.
Table 26 - Boiler Error and Fault Codes