Hayward H400FDN Universal H Series Troubleshooting Guide - Page 5

Fuse Circuit Board Layout

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Fuse Circuit Board Layout Fuse board configuration Prior to November 2010 (Older Style) A Power connection for junction boxes: 120/240VAC (P1) After Aug 08 Terminal block for field wiring B connections: 120/240VAC (TB1) Before Aug 08 Input Voltage Selector 240 OR 120VAC A C determined by plug (P2): NOTE: 240VAC plug factory installed Fuse: 3A protect primary input voltage, D will fail with excessive voltage, improper wiring, shorted transformer or fuse B board (FC1 & FC2) E Transformer Primary: 120/240VAC (P3) F Transformer Secondary: 24 (left) & 120VAC (right) (P4) Fuse: 1.5A protects transformer G secondary, will fail if short occurs between fuse & ICB (FC3) Fuse: 2.5A protects transformer high H voltage secondary, will fail with blower, ignitor or ICB failure (FC4) I Low Voltage Output: 24VAC (P5) J High Voltage Output: 120VAC (P6) E I J D G H C F 5

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5
A
Power connection for junction boxes:
120/240VAC (P1) After Aug 08
B
Terminal block for field wiring
connections: 120/240VAC (TB1) Before
Aug 08 Input
C
Voltage Selector 240 OR 120VAC
determined by plug (P2):
NOTE: 240VAC
plug factory installed
D
Fuse: 3A protect primary input voltage,
will fail with excessive voltage, improper
wiring, shorted transformer or fuse
board (FC1 & FC2)
E
Transformer Primary: 120/240VAC (P3)
F
Transformer Secondary: 24 (left) &
120VAC (right) (P4)
G
Fuse: 1.5A protects transformer
secondary, will fail if short occurs
between fuse & ICB (FC3)
H
Fuse: 2.5A protects transformer high
voltage secondary, will fail with blower,
ignitor or ICB failure (FC4)
I
Low Voltage Output: 24VAC (P5)
J
High Voltage Output: 120VAC (P6)
Fuse Circuit Board Layout
A
B
C
E
F
G
H
J
I
Fuse board configuration Prior to November 2010 (Older Style)
D