TM 9-4940-568-20
2-43
Table 2-5. Generator Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check for voltage at Main A/C circuit breaker CB21 input side.
If 120/208 VAC is present replace circuit breaker.
Disconnect voltage regulator VR21 and attach 12 VDC to F1 (positive lead) and F2 (negative lead).
If voltage is present, replace voltage regulator. Notify Direct Support.
If no voltage present, notify Direct Support.
2. OUTPUT VOLTAGE IS TOO HIGH OR TOO LOW.
1
The voltage has been adjusted improperly.
Adjust output voltage by turning voltage adjustment screw (1).
Improper connections have been made at the generator output terminals.
Shut down the set and reconnect according to the appropriate reconnection diagram. See
inside of main power switch panel.
Voltage Regulator VR21 is faulty.
Replace voltage regulator. Notify Direct Support.
