Sf" Or "Hs" Code - Hayward H150FDN Troubleshooting Manual

8. Service LED ON: "SF" OR "HS" Code
Ohm thermistor,
YES YES
"SF" OR
Is "SF" code
Check display for
checking each red to
"HS" Code present?
"SF" code
black, do the readings
differ by more than 1°?
NO
NO
The "HS" code
stands for High
Replace ICB:
Sense (water
FDXLICB1930
Ohm thermistor,
temperature).
YES
checking each red to
black, do the readings
differ by more than 1°?
Make sure water
YES
Replace
inlet & outlet are
NO
thermistor:
plumbed correctly,
FDXLTER1930
are they reversed?
NO
Replace ICB:
FDXLICB1930
Plumb correctly in
compliance with
Replace
installation manual
thermistor:
FDXLTER1930
40