ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
Table 2-6. UNIT TROUBLESHOOTING - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
22. GENERATOR SET FAILS TO GENERATE POWER.
Step 1. Test AC Circuit interrupter relay, K1, refer to paragraph 2-61-3.
a. If the AC Circuit interrupter relay, K1 is not defective, do Step 2.
b. If defective, replace the AC circuit interrupter relay K1, refer to paragraph 2-61.
Step 2. Test Field Flash Relay. K15, paragraph 2-33-2.
a. If the field flash relay is defective replace per paragraph 2-33.
b. If relay is not defective refer to next higher level of maintenance.
23. AC VOLTMETER (VOLTS AC) INDICATES VOLTAGE. BUT FREQUENCY METER IS OFF SCALE.
Step 1. Check for defective frequency adjust control cable, paragraph 2-89-2.
a. If frequency adjust control cable is not defective, do Step 2.
b. If defective, replace or adjust frequency adjust control cable, paragraph 2-89.
Step 2. Test for defective FREQUENCY meter (HERTZ), paragraphs 2-44-2 or 2-44-3.
a. If FREQUENCY meter (HERTZ) is not defective, do Step 3.
b. If defective, replace FREQUENCY meter (HERTZ), paragraph 2-44.
Step 3. Test for defective frequency transducer, paragraphs 2-28-2 or 2-28-3.
a. If frequency transducer is not defective, do Step 4.
b. If defective, replace frequency transducer, paragraph 2-28.
Step 4. Check frequency meter circuit for breaks or loose connections, refer to Wiring Diagram FO-2.
If breaks or loose connections are found, repair circuit.
24. AC VOLTMETER (VOLTS AC) VOLTAGE FLUCTUATES.
Step 1. Check for loose electrical connections, refer to Wiring Diagram FO-2.
a. If no loose connections, do Step 2.
b. If loose, tighten electrical connections.
Step 2. Test for defective AC voltmeter (VOLTS AC), paragraph 2-46-2.
a. If AC voltmeter (VOLTS AC) is not defective, do Step 3.
b. If defective, replace AC voltmeter (VOLTS AC), paragraph 2-46.
Step 3. Test for defective VOLTAGE adjust potentiometer, paragraph 2-48-2.
a. If VOLTAGE adjust potentiometer is not defective, do Step 4.
b. If defective, replace VOLTAGE adjust potentiometer, paragraph 2-48.
2-23
