Cooper Bussmann 858 - Manual (Page 17)

DOCUMENT 1025
REV. H
Instruction Manual
AGS-LED
858 LED Series
Sizes 1, 2, 3, 4 and 5
8
10.2 Problem Solving Guide
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
(P.1) Sign will
not light No input current. (LEDs on Power
Supply board not lit) Measure input current
according to Sections 10.3 and
10.4. If the measured input
current is not within spec (see
Tables 9-11), check CCR,
isolation transformer, and
primary power connections.
(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).