Table 4-3. Organizational Troubleshooting-Continued
TEST OR INSPECTION
5. ENGINE RUNS ERRATICALLY OR MISFIRES-continued
setting AC PWR CKT BKR to OPEN.
If engine now runs smoothly, reconnect load by setting AC PWR CKT BKR to CLOSE, and
proceed to next step.
Check KW and KVAR readings on Generator Control Panel.
If readings indicate excessive power draw, rearrange load distribution to restore normal power
If KW and KVAR reading are normal, refer to next higher level of maintenance.
6. ENGINE EXHAUST EXCESSIVELY BLACK
Visually check fuel; if contaminated with water or dirt, drain fuel and fill with clean fuel. If fuel is
not contaminated, refer to Malfunction 5, Steps 1 through 4.
7. ENGINE EXHAUST WHITE OR BLUE
Check for excessive lube oil using sight gauge, then dipstick.
If lube oil level too high, drain crankcase (see paragraph 4-8) until proper level is indicated.
Visually check engine fuel for contamination (see Malfunction 6).
If contaminated, replace fuel.
8. GENERATOR OUTPUT FREQUENCY INCORRECT
Test FREQ ADJ switch S5 (88, figure 4-22) in accordance with paragraph 4-40).
Replace FREQ ADJ switch S5 if defective (see paragraph 4-40).
If S5 is not defective, inspect motoroperated potentiometer B4 (2, figure 4-19) according to
paragraph 4-35 and refer to next higher level of maintenance for testing.