Table 4-2. Organizational Troubleshooting - continued

55-1730-229-12

320A0-OMM-000

35C2-3-473-1

1730-12/1

Table 4-2.

Organizational Troubleshooting (continued)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

(continued)

58.

Step 2.

Shut down engine and disconnect battery. Check diode 1CR1 (malfunc-

tion 99).

Replace diode if defective (paragraph 4-108.b), and perform

operational check.

If diode is good, do step 3.

Step 3.

Remove battery charger access cover, and lower control panel (para-

graph 4-24.a). Disconnect P7 from J7, and disconnect P12 (36, figure

4-38) from GCU. Check for continuity between P7-12R and P12-C (see

If no continuity, replace wire X24A20.

If continuity, replace GCU (paragraph 4-54).

Perform operational check.

Test ac contactor K1 (malfunction 95).

Step 4.

Replace contactor if defective (paragraph 4-53).

If contactor tests good, replace GCU (paragraph 4-54).

Perform operational check.

AC UNDER FREQUENCY INDICATOR DOES NOT LIGHT WHEN AC HERTZ METER READS LESS THAN

59.

375 HZ.

Step 1.

Note AC POWER ON indicator and set AC POWER switch off.

If AC POWER ON indicator was off (before AC POWER switch was set

to off) do step 2. If not, go to step 4.

Step 2.

Shut down engine and disconnect battery. Check diode 1CR4 (malfunc-

tion 99).

Replace diode if defective (paragraph 4-108.b), and perform

operational check.

If diode is good, do step 3.