Hayward H400FDN User Manual

29
3. Open FC3 &/or F1 Fuse
Open FC3
&/or F1 Fuse
Check the remote
connection/high
limits
Is low voltage
wiring damaged,
pinched, or worn?
Is water pressure
switch wiring
damaged, pinched,
or worn?
Replace wire harness:
FDXLWHA1930
OR high limit if damaged:
FDXLHLI1930
YES
NO
YES
Are any wires
showing
continuity?
NO
Is blower vacuum
switch wiring
damaged, pinched,
or worn?
YES
Is gas valve wiring
damaged, pinched,
or worn?
NO
NO
YES
Test gas valve
wires for
continuity against
ground
Replace gas
valve:
(pg. 20)
YES
Inspect ICB
wiring, any wires
compromised?
YES
Replace wiring
harness:
FDXLWHA1930
Replace ICB:
FDXLICB1930
NO
Replace wire harness:
FDXLWHA1930
OR pressure switch if
damaged:
FDXLWPS1930
Replace wire harness:
FDXLWHA1930
OR vacuum switch if
damaged:
FDXLBVS1930
Replace wire harness:
FDXLWHA1930
OR Replace gas valve:
Please refer to (pg. 20)
NO

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