TROUBLESHOOTING GUIDE D - CAUTION PANEL

TM 55-1510-218-MTF

TROUBLESHOOTING GUIDE D - CAUTION

PANEL

CONDITION

PROBABLE CAUSE

D1.

Placard light (annunciator panel) will not illumi-

nate when press-to-test button is pressed.

a. Defective placard Iight.

D2.

Fault warning light will not illuminate for any

red faults.

a. Defective fault warning light.

b. Defective fault warning light resistor.

c. Defective annunciator control box.

D3.

Depressing the press-to-test switch has no effect

on fault warning system operation.

a. Defective switch.

b. Defective annunciator control box.

D4.

Dim control does not function properly.

a. Defective rheostat.

b. Defective dim bias resistor.

c. Defective annunciator control box.

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