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DOCUMENT 1025
REV. B
Instruction Manual
AGS-LED
858 LED Series
Sizes 1, 2, 3, 4 and 5
8
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
(P.2) Sign will
not light
Input current is below or exceeds
specification. (Input current is
specified between 2.8 and 6.6
amps using a true RMS Ammeter.
L858 Power Supply indicator RED
LEDs D4 is ON, and D7 is OFF;
Table 12)
Adjust CCR current (See
Tables 9-11 and/or replace
isolation transformer with
appropriate wattage for sign
(see Tables 3-8).
(P.3) Sign will
not light
Optional ON/OFF switch in OFF
position
Turn switch to ON position.
(P.4) Sign will
not light
Power Supply Circuit Card +15V
supply failed (See Table 12)
Verify Green LED D29 is lit.
Replace Power Supply Board
if D29 is not lit.(Section 10.12)
(P.5) Sign will
not light
Power Supply Circuit Card +3.3V
supply failed (See Table 12)
Verify Green LED D11 is lit.
Replace Power Supply Board
if D11 is not lit (section
10.12).
(P.6) Sign will
not light
Loose/broken wire(s)/missing
connections
Verify Power Supply
connections match Power
Supply Wiring Diagram
(Figures 18 & 21).
(P.7) Sign will
not light
Output Electrical Open Circuit
(See Table 12)
Verify LED cable connectors
are properly seated in their
respective receptacles; reseat if
necessary (See Sections 10.5 &
10.6)
(P.8) Sign will
not light
LED MODULE(s) mounted/wired
incorrectly
Verify that LED MODULES
are mounted and wired
according to LED Array
Wiring Diagram. (See Figures
7-11 and Sections 10.7-10.9)
(P.9) Sign will
not light
LED MODULE(s) open circuit
failure (Assumes P.7 Action taken)
Replace suspected open circuit
LED MODULE with spare
known good LED