TM 55-1510-222-MTF
TROUBLESHOOTING GUIDE D - CAUTION
P A N E L
CONDITION
D1.
D2.
D3.
D4.
PROBABLE CAUSE
Placard light (annunciator panel) will not illumi-
nate when press-to-test button is pressed.
a. Defective placard light.
b. Defective lamps.
Master warning or master caution annunciator
light will not illuminate for any red or yellow
faults.
a. Defective fault warning light.
b. Defective fault detection module.
c. Defective annunciator control module.
Depressing the press-to-test switch has no effect
on fault warning system operation.
a. Defective switch.
b. Defective circuit breaker.
c. Defective wiring.
Dim control does not function properly.
a. Defective rheostat switch.
b. Defective annunciator control module.
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