LP-551 Rev. 3.9.16
53
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 in this manual 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.
LOW WATER FLOW FL
PUMP OFF 4:32P
This indicates the flow switch is not activated.
1. Ensure boiler contains water and all valves are open.
2. Check the boiler circulator and ensure it is in good
operating condition (operating, wiring intact, etc.).
3. Inspect the wiring to the flow switch for damage and
repair as necessary.
4. Disconnect one wire from the flow switch and test for
continuity across the switch while flow is confirmed to be
present.
5. Remove flow switch and inspect switch paddle for
proper operation.
FLUE TEMP HIGH E07
PUMP ON TIME
This display indicates that the flue sensor
temperature is above 210
o
F. When this code
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 on
when this error is displayed.
Check the flue for obstructions or 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.
TEMPER BLOCKING TT
PUMP ON
TT indicates there is a demand for heat on
the boiler, the pump is powered on, and the
supply sensor temperature is too high for
the boiler to ignite. This occurs because the
water temperature measured by the supply
sensor is higher than the tank temperature –
ignition diff setting.
This message will stay present until the water temperature
measured by the supply sensor is less than the tank
temperature – ignition diff setting.
HIGH FLUE PRESS FLU
PUMP ON
FLU indicates excessive flue pressure. This
code resets automatically after the high
pressure condition is resolved. The second
line indicates pump status.
1. Assure the flue is not blocked.
2. Check the switch wiring by applying a jumper in place
of the switch. If the code clears with the jumper in place,
REPLACE the flue switch and connect the wires to the
new switch BEFORE running boiler.
WARNING:
Do not use jumper to remedy an FLU error. Faulty switch MUST be replaced. Failure to follow this instruction could result in
serious personal injury or death.
FLUE TEMP HIGH E07
PUMP OFF TIME
E07 indicates the flue sensor temperature
is excessive and above 205
o
F. When E07 is
displayed the boiler will not respond to a
demand for heat and begin to modulate
down on vent temp rather than supply temp.
When the flue temperature decreases below
185
o
F, the display will return to normal and
allow the boiler to respond to a heat demand.
1. Check the flue for obstructions and any sign of damage,
especially signs of excessive heat. Repair as necessary.
2. 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.
3. 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.
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 47 - 62.5 Hz.
Table 31 - Boiler Error and Fault Codes
Summary of Contents for EP-220 VWH
Page 33: ...LP 551 Rev 3 9 16 33 Figure 24 Cascade Master and FollowerWiring ...
Page 34: ...LP 551 Rev 3 9 16 34 Figure 25 Internal Connection Diagram ...
Page 57: ...LP 551 Rev 3 9 16 57 Figure 30 Combustion System Replacement Parts 220kBTU Model ...
Page 58: ...LP 551 Rev 3 9 16 58 Figure 31 Combustion System Replacement Parts 299 399kBTU Models ...
Page 59: ...LP 551 Rev 3 9 16 59 Figure 32 Replacement Parts All Models ...
