SECTION SEVEN – Troubleshooting
7-8
Diagnostic LED’s: SFS
Replace Heater Membrane
Pad Assembly, reset power to
Heater and retry. Heater
should fire.
Replace Heater Membrane
Pad Assembly, reset power to
Heater and retry. Heater
should fire.
Replace Heater Control Board
with new style board, reset
power to Heater and retry.
Heater should fire.
Change Low Level Board
Programming to “SF1” (See
Page 4-11). Were you able to
change the device code (SF0
to SF1)?
Reset power to Heater and
retry. Heater should fire.
Check Heat Exchange Coil for
liming or low flow.
Reset power to Heater and
retry. Fire?
Did Error Code (E05 or E06)
disappear after change?
Replace Heater Control
Board, reset power to Heater
and retry. Heater should fire.
NO
YES
NO
NO
SENSOR
SWITCH
Reset power to Heater and
retry. Heater should fire.
Does the Digital Temerature
Display show Error Code
“E05” or “E06”?
Change Low Level Board
Programming to “SF0” (See
Page 4-11). Were you able to
change the device code (SF1
to SF0)?
Check Heat Exchanger Coil
for liming or low flow.
A) Is the Stack Flue
Switch or Sensor
correctly connected to
the wiring harness?
B) Is the Membrane Pad
connected to the
correct pins on the
Control Board?
(See Page 4-30)
Check the J3 and J6
connectors for corrosion
on the male pins.
Corrosion found?
Clean pins
Reset power to Heater
and retry. Heater should
fire.
Reset power to Heater
and retry. Heater should
fire.
Replace switch, reset
power to Heater and retry.
Verify whether you have a
Stack Flue Sensor or a
Stack Flue Switch
(See Page 4-11).
Does the Digital
Temerature Display
show Error Code “E05” or
“E06”?
NO
YES
YES
NO
SFS “on”
Reconnect correctly.
Replace Stack Flue Sensor.
DONE
YES
NO
NO
YES
YES
NO
NO
NO
YES
YES
DONE
NO
NO
NO
