Hayward H400FDN User Manual

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

Hayward H400FDN Specifications

General

Type	Natural Gas
BTU Input	400, 000 BTU
Pool Type	In-ground
Heat Exchanger	Cupro Nickel
Voltage	120V
Efficiency	84%
Water Flow Rate	40-120 GPM
Inlet/Outlet Size	2 in
Ignition	Electronic