TM 9-4120-405-13&P
Table 3-1. Operator Troubleshooting. (cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. GENERATOR SUPPLIES NO VOLTAGE TO LOAD.
Step 1. Check main circuit breaker for ON position on AC output control box
Place circuit breaker on ON position. If breaker will not stay ON, notify your supervisor.
Step 2. Check load terminal board.
Make certain load leads are attached to the correct load terminals. Make certain connections are clean and
tight.
12. GENERATOR SUPPLIES IMPROPER (UNDER AND OVER) VOLTAGE/FREQUENCY TO LOAD.
Step 1. Check reconnection switch on AC output control box.
Make certain switch position matches load. (Refer to TM 5-6115-585-12.)
CAUTION
Disconnect load before switching.
Step 2. Check load terminal board.
Make certain load leads are attached to the correct load terminals. Make certain connections are clean and
tight.
Step 3. Check engine speed.
(a) Adjust engine speed by turning speed control assembly until frequency meter on control panel indicates
rated frequency with load on generator-set.
(b) If engine speed cannot be brought up so that generator-set operates at rated frequency, check external
governor linkage for binding and check steps under ENGINE STARTS BUT DOES NOT RUN
SMOOTHLY.
(c) If engine cannot be brought down so that generator-set operates at rated frequency, check external
governor linkage for binding or notify your supervisor. (Refer to TM 5-6115-585-12.)
TRAILER
13. ALL LAMPS FAIL TO LIGHT.
Step 1. Check operation of light switch in towing vehicle.
Notify supervisor for maintenance.
Step 2. Check circuit breakers and fuses in towing vehicle.
Reset circuit breakers and replace bad fuses. (Refer to towing vehicle's technical manual.)
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