LP-314 Rev. 012 Rel. 003 Date 9.27.19
43
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 appliance water, be certain that:
• There is no pressure in the appliance. (Pull the release on the relief valve. Do not depend on the pressure gauge reading.
• The appliance 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 appliance damage. Instead, shut off the gas supply to the appliance 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 appliance. 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 inside of the appliance cabinet and
cause some internal sheet metal components to rust.
D. User Interface Display
Fault Codes
Screen
Description
Possible Remedy
OUTDOOR SENSOR
PUMP ON FOU
This indicates that the outdoor sensor is defective,
shorted or open, or outdoor temperature is below
–40
o
F.
NOTE:
The installer must choose YES in Function
12 to enable this feature. The unit will continue
to operate when this error is displayed but the
control will ignore the outdoor reset feature and
run at the programmed temperature. The bottom
line indicates the status of the pump.
Inspect wiring from outside sensor for damage or shorted
connections and repair as necessary. Measure resistance of
the outdoor sensor and compare to resistance chart. If not
within range on chart, shorted or open, replace sensor.
CH SENSOR FAIL
PUMP ON E07
This indicates that one or both of the clip-on
temperature sensors in the hydronic heating
module has been disconnected. This error allows
the tank portion of the unit to operate, but will
not allow the hydronic heating module to operate
until the error is cleared. The error will clear if
proper sensor connection is restored. The bottom
line indicates the status of the pump.
1. Go to the STATUS menu screen that displays “CH Supply” on
the bottom line. This will help to determine which sensor has
the error. If the temperature displayed is reasonable, the error
will be in the return temperature sensor (Horizontal Pipe). If
the temperature displayed is not reasonable, the error will be
in the supply sensor (Vertical Pipe).
2. Check the electrical connection to the thermistor on
the outlet manifold. Check the wiring harness. If both are
connected properly, replace the control.
NOTE:
Verify the thermistor values by referencing the
Resistance Tables in this manual.
3. Replace thermistor if necessary.
ECS NOT CONNECTED
PUMP OFF
This indicates the main control board and the
smaller ECS control board are not communicating
properly. This error allows the tank portion of
the unit to still operate, but will not allow the
hydronic heating module to operate until the
error is cleared. The second line indicates the
status of the pump.
1. Ensure both ends of the ribbon cable are connected
properly and securely in place.
2. Next, check the ribbon cable for damage or wear. If any
problems are found, replace the ribbon cable.
3. If problem still occurs with the new ribbon cable, replace
the ECS board.
TEMPER BLOCKING
PUMP ON 12:31P
This display indicates a temporary hold on the
burner. There is a demand on the appliance for
heat, the pump is powered on, but the but the
top tank sensor is above the set point and the
bottom is substantially cooler than the top. This is
a temporary hold on the burner only and all other
functions will remain functioning properly.
This error will clear itself when either the top tank temperature
drops below the set point or the bottom temperature rises.