Hayward H400FDN Universal H Series Troubleshooting Guide - Page 47

Idxl2snt1930, Fdxlvps1930, Fdxlegl1931

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11. Service LED ON: "LO" Code Section B (continued from previous page) YES Heater made after Feb. 2016? NO Contact Support (908) 355-7995 Does exhaust gas limit have YES continuity? NO 47 Inspect vent pressure switch tube & connections Test vent pressure switch continuity Is tube YES damaged? NO Inspect flue and vent sizing Repair or replace tube kit: IDXL2SNT1930 YES Continuity present? NO Replace vent pressure switch: FDXLVPS1930 Replace exhaust gas limit switch: FDXLEGL1931 YES Is flue dirty? NO YES Vent sized correctly? NO Clean flue and retest Refer to installation/ indoor vent instructions

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Inspect vent
pressure switch
tube & connections
47
11. Service LED ON: “LO” Code
Repair or replace
tube kit:
IDXL2SNT1930
Section B
(continued from
previous page)
Is tube
damaged?
YES
NO
Inspect flue and
vent sizing
Is flue dirty?
YES
Clean flue
and retest
NO
YES
NO
Vent sized
correctly?
Refer to
installation/
indoor vent
instructions
Test vent
pressure switch
continuity
Continuity
present?
YES
NO
Replace vent
pressure switch:
FDXLVPS1930
Heater made
after Feb.
2016?
YES
NO
Contact
Support
(908) 355-7995
Does exhaust
gas limit have
continuity?
Replace exhaust
gas limit switch:
FDXLEGL1931
NO
YES