Hayward H400FDN Universal H Series Troubleshooting Guide - Page 56

Service LED ON: AC Code

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13. Service LED ON: "AC" Code "AC" Code Test for continuity on the blower vacuum switch Does the switch have continuity? YES Replace blower vacuum switch: FDXLBVS1930 NO Put the heater in "Stand by" Replace ICB: FDXLICB1930 YES Is the blower running? NO Replace blower vacuum switch: FDXLBVS1930 56

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“AC” Code
NO
56
Does the switch
have continuity?
YES
Is the blower
running?
NO
Replace blower
vacuum switch:
FDXLBVS1930
YES
13. Service LED ON: “AC” Code
Test for continuity
on the blower
vacuum switch
Put the
heater in
“Stand by”
Replace blower
vacuum switch:
FDXLBVS1930
Replace ICB:
FDXLICB1930