Hayward H400FDN Universal H Series Troubleshooting Guide - Page 30

Inspect water pressure switch, Inspect connections/high limits, Inspect blower vacuum switch,

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3. Open FC3 &/or F1 Fuse Inspect connections/high limits Step 3A Inspect water pressure switch Step 3B Power down and inspect all remote connections and high limit wiring for damage. IF damaged, repair/replace (pg. 20). IF OK, go to step 3B. Inspect blower vacuum switch Step 3C With power off, inspect the water pressure switch wiring for damage. IF damaged, replace the wire harness (pg. 20). IF OK, go to step 3C. Inspect gas valve wiring Step 3D With power off, inspect the blower vacuum switch wiring for damage. IF damaged, replace the wire harness (pg. 20). IF OK, go to step 3D. 30 With power off, inspect the gas valve wiring for damage. IF damaged, replace the wire harness (pg. 20). IF OK, go to step 3E.

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Power down and inspect all remote connections
and high limit wiring for damage. IF damaged,
repair/replace (
pg. 20
). IF OK, go to step 3B.
Inspect water pressure switch
With power off, inspect the water pressure switch
wiring for damage. IF damaged, replace the wire
harness (
pg. 20
). IF OK, go to step 3C.
Inspect connections/high limits
Step 3A
With power off, inspect the blower vacuum switch
wiring for damage. IF damaged, replace the wire
harness (
pg. 20
). IF OK, go to step 3D.
Inspect blower vacuum switch
Step 3C
30
With power off, inspect the gas valve wiring for
damage. IF damaged, replace the wire harness (
pg.
20
). IF OK, go to step 3E.
Inspect gas valve wiring
Step 3D
Step 3B
3. Open FC3 &/or F1 Fuse