
LP-517 Rev. 000 Rel. 019 Date 7.21.20
49
B. Boiler Error
The controller will display an error code and message when an error
condition occurs. These error codes, descriptions, and recommended
corrective actions are described in Section D.
C. Boiler Fault
1. The controller will illuminate the red “FAULT” indication light and
display a fault code and message when a fault condition occurs. The
alarm output will also activate. Most fault conditions cause the CH
pump to run in an attempt to cool the boiler.
2. Note the displayed fault code and refer to Section D for an
explanation of the message along with several suggestions for
corrective actions.
3. Press
RESET
to clear the fault and resume operation. Be sure to
observe the operation of the unit for a period of time to assure
correct operation and no reoccurrence of fault message.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN SUBMERGED
IN WATER.
Immediately call a qualified service technician. The
appliance MUST BE replaced if it has been submerged. Attempting
to operate an appliance that has been submerged could create
numerous harmful conditions, such as a potential gas leakage
causing a fire and/or explosion, or the release of mold, bacteria,
or other harmful particulates into the air. Operating a previously
submerged appliance could result in property damage, severe
personal injury, or death.
NOTE:
Appliance damage due to flood or submersion is considered
an Act of God, and IS NOT covered under product warranty.
When servicing or replacing components that are in direct contact
with boiler water, be certain that:
• There is no pressure in the boiler. (Pull the release on the relief
valve. Do not depend on the pressure gauge reading.
• The boiler water is not hot.
• The electrical power is disconnected.
• The gas is shut off.
Failure to make these checks could result in substantial property
damage, serious personal injury, or death.
If overheating occurs or the gas supply fails to shut off, do not turn
off electrical power to the circulating pump. This may aggravate
the problem and increase the likelihood of boiler damage. Instead,
shut off the gas supply to the boiler at the gas service valve. Failure
to do so may result in property damage, personal injury, or death.
Label all wires prior to disconnecting them when servicing the
boiler. Wiring errors can cause improper and dangerous operation.
Failure to follow these instructions may result in property damage
or personal injury.
NOTE:
If system return temperatures are maintained below the dew
point, condensation will form on the boiler cabinet and cause some
components to rust.
D. User Interface Display
Cascade Control Fault Codes
Screen
Description
Possible Remedy
SYS SUPPLY SENSOR E03
PUMP OFF 12:56P
E03 indicates a problem with the system
sensor circuit. The circuit could be open
or shorted. Possible reasons for this error
are:
There is no system sensor connected to
the Master Boiler.
The system sensor is faulty.
There is a short circuit in the system
sensor wiring; possibly from a staple
placed through the wire, or damage to
the wire causing both conductors to
touch.
The system sensor wiring is open due to
defect or damage.
Disconnect the system sensor from the wiring and measure it’s
resistance. Compare the measured resistance to the table in this
manual to see if it corresponds to the temperature of the sensor. If
the resistance does not agree with the sensor, replace the sensor. If
the sensor is OK, disconnect the sensor wiring from both the boiler
and the sensor and check continuity using an ohmmeter. Repair or
replace as necessary.
If this error is present, the boilers in the cascaded group will run
and ignite simultaneously when there is a heat demand. Each boiler
will modulate to maintain set point temperature on its own supply
sensor. This code automatically resets when repair is complete. This
code will not display if system setting function ERROR SYSTEM SENS
is set to OFF.
FLUE TEMP ECO F01
PUMP ON 1:47P
This code indicates that the Flue ECO has
tripped because the flue temperature
has exceeded 190
o
F. This switch has to
be manually reset.
1. Push the reset button in the center of the switch body to reset the
switch.
2. Monitor the actual surface temperature of the heat exchanger near
the switch. If the switch trips again, proceed with the steps below.
3. Disconnect the flue ECO on the rear of the heat exchanger from
the wiring and measure it’s resistance. Resistance should be at or
near zero (0) ohms. If there is infinite resistance (open circuit), replace
the ECO.
4. If the ECO is OK, disconnect the switch wiring from both the boiler
and the ECO and check continuity of the wiring using an ohmmeter.
Repair or replace as necessary.
NOTE: The common reasons for temperature switches to trip are a)
low water flow through the boiler, b) poor heat transfer from water
to the load, or c) flue blockage.
5. Push RESET on the boiler. If the boiler tries to ignite or ignites and
only runs for a short time and the F01 code returns, investigate the
flue for blockage.
is an error message displayed on the readout, and the message
“LOCKOUT” is not displayed and the FAULT light is not lit, then the
message is the result of a temporary condition and will disappear
when the problem corrects itself.
IMPORTANT NOTE:
If you see error messages on your display
readout, call a technician immediately, since the message may
indicate a more serious problem will occur soon.