Hayward H400FDN Universal H Series Troubleshooting Guide - Page 33

Verify ignitor resistance, Ignitor and blower wiring, Measure blower resistance

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4. Open FC4 Fuse Ignitor and blower wiring Step 4A Verify ignitor resistance Step 4B Inspect the Ignitor & Blower wiring. Verify insulation is not damaged. IF wires are damaged, replace the damaged part (pg. 20). IF OK, go to 4B. Disconnect ignitor from ICB & measure resistance of ignitor. Verify 8-25 ohms between 20°-140°F. IF correct, go to 4C. IF NOT, replace ignitor (pg. 20). Measure blower resistance Step 4C Before Sept. 2010 With power off, disconnect blower plug from ICB. Models manufactured before Sept. 2010: measure across pins 1-2 (black & red), then 3-4 (white & blue) for 8-9 ohms. Models after Sept. 2010: measure for 4-5 ohms across the two terminal with wires. IF out-of-range, replace 33 blower (pg. 20). IF correct, contact technical support (908)355-7995.

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Inspect the Ignitor & Blower wiring. Verify
insulation is not damaged. IF wires are damaged,
replace the damaged part (
pg. 20
). IF OK, go to 4B.
Verify ignitor resistance
Disconnect ignitor from ICB & measure resistance
of ignitor. Verify 8-25 ohms between 20°-140°F. IF
correct, go to 4C. IF NOT, replace ignitor (
pg. 20
).
Ignitor and blower wiring
Step 4A
33
Step 4B
4. Open FC4 Fuse
With power off, disconnect blower plug from ICB. Models manufactured before Sept. 2010:
measure across pins 1-2 (black & red), then 3-4 (white & blue) for 8-9 ohms. Models after Sept.
2010: measure for 4-5 ohms across the two terminal with wires. IF out-of-range, replace
blower (
pg. 20
). IF correct, contact technical support (908)355-7995.
Measure blower resistance
Step 4C
Before Sept. 2010