Cooper Bussmann 858 instruction manual Problem Possible Cause Corrective Action

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