Hayward ProLogic Troubleshooting Manual page 21

Blank Display/
NO LEDs
Power OFF &
verify display
connections
YES
21
2. Blank Display/No LEDs
YES
Local display cable
free of damage?
NO
Contact tech
support for
replacement
(908)355.7995
Replace Local
Display:
(see pg. 17)
Local display
power is
11VDC?
NO
Replace Main
Board:
(see pg. 17)
Remove
terminal blocks
and power cycle
YES
YES
Fuse has
continuity?
NO
YES
Is 120VAC
present?
NO
Resolve source
power issue
YES
Is Display
normal?
NO
System has a
2amp,
integrated fuse?
NO
Replace main
board
(see pg. 17)
YES
Test incoming
power
Replace fuse
(GLX-F3A-10PK)
Problem is in
terminal block
or comm
equipment.
Isolate
equipment to
find root cause
Test 3amp
(violet) fuse
Fuse has
continuity?
NO