Hayward H400FDN Universal H Series Troubleshooting Guide - Page 21
Heater Not Powering Up
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1. Heater Not Powering Up Heater not powering up Is incoming power correct? NO Correct source power issue Correct voltage selector plug? YES Inspect wires & connections, are they OK? NO YES Install correct plug and retest NO Replace harness and/or reseat connection: FDXLWHA1930 Go to section B (next page) YES Is voltage correct? NO Replace fuse board: FDXLFWP1930 YES Test FC1 & FC2 fuses Is either YES fuse blown? NO Test transformer input for 110-125VAC Go to: Section 2 Is voltage YES correct? NO Test transformer output for 22- 28VAC Replace fuse board: FDXLFWP1930 YES Is voltage correct? NO Test 22-28VAC between R & C on P5 (fuse board) Replace transformer: IDXL2TRF1930 21
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1. Heater Not Powering Up
Heater not
powering up
Correct source
power issue
YES
NO
Correct voltage
selector plug?
NO
Inspect wires &
connections,
are they OK?
YES
Test FC1 &
FC2 fuses
Is incoming
power correct?
Is either
fuse blown?
Go to:
Section 2
Test 22-28VAC
between R & C on
P5 (fuse board)
Test
transformer
output for 22-
28VAC
Is voltage
correct?
NO
Replace fuse
board:
FDXLFWP1930
NO
Install correct
plug and
retest
Replace harness
and/or reseat
connection:
FDXLWHA1930
YES
YES
NO
Test transformer input
for 110-125VAC
YES
Is voltage
correct?
Replace
transformer:
IDXL2TRF1930
YES
NO
Is voltage
correct?
YES
Go to section B
(next page)
NO
Replace fuse
board:
FDXLFWP1930
21