Pentair ETi 250 - Alarms: SFS

ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
57
Troubleshooting
Diagnostic Alarms: SFS
YES
(HD)
YES
(Basic)
NO
Reset power to Heater and
retry. Heater should fire.
Does the LCD show Error
Code “E05” or “E06” ?
Heater starts and runs OK,
but temperature of exhaust
climbs to 170°F (77°C) in
3-5 minutes.
Heater starts after several
tries, exhaust temperature
stays below 250°.
OR
Heater doesn’t start at all
(exhaust stays cold).
Check pressure and volume
of fuel supply
Check the J12
connectors for corrosion/
looseness on the male
pins.
Check continuity in wiring
harness between Control
Board and sensor.
Continuity OK?
Disconnect the sensor and
check continuity across its
terminals. Resistance
should be 3.5-4.0 mega-
ohms.
1 =
open circuit;
0 = shorted.
Does sensor check OK?
Clean/tighten pins as
needed.
Reset power to Heater
and retry. Heater should
fire.
NOT OK
NO
NO
NO
NO
NO
ERR SFS
Replace Stack Flue Sensor
Correct Fuel Supply, reset
Heater and retry. Heater
should fire correctly.
DONE
DONE
YES
YES
OK
YES
Replace Heater
Control Board.
Replace Heater
Membrane Pad.
Reset power to Heater and
retry. Heater should fire.
Check Heat Exchanger Coil for
leaks, liming, soot, or low flow.
Check Heat Exchanger
Coil for leaks, liming, soot,
or low flow.
DONE
NO
DONE
Replace Heater Membrane Pad.
Replace Heater Control Board.
Reset power to Heater and
retry. Heater should fire.
Reset power to Heater and
retry. Heater should fire.
DONE
NO
YES
DONE
NO
NO