Display Not Lit - Hayward HydroRite UVO3 Troubleshooting Manual

Display Not Lit

Replace
the display
YES
Replace
Transforme
r
Test
interconnect
board fuses
YES
Replace
interconnect
board
32
2. Display Not Lit
Test power to YES
display, is power
less than 5VDC?
NO
Replace YES
interconnect
board
Both
transformer
inputs show
108-132VAC?
NO
YES
Are fuse(s)
blown?
NO
Verify source
power, is 108-
132VAC
power issue
present?
NO
Test main board
input power for 192-
288VAC off
interconnect board
Transformer
output shows
192-288VAC?
NO
Verify
voltage
selectors are
correct
Resolve
Problem
source
solved
YES
Is power
correct?
NO
Test the 1A
power fuse
Verify
YES
voltage
selectors are
correct
Replace
fuse &
main PCB
retest
Replace
YES
Did the
board with
fuse blow
affected
again?
NO
display
Is the
fuse
blown?
NO
Replace
fuse