ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14. BATTERY CHARGING AMMETER SHOWS EXCESSIVE CHARGING AFTER PROLONGED OPERATION.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Improperly adjusted alternator.
Adjust alternator (para 4-19).
Defective batteries.
Replace batteries (para 4-14).
Defective alternator.
Replace alternator (para 4-19).
Short in charging circuit.
Check charging circuit. Repair or replace shorted wiring.
Defective battery charging ammeter.
Replace battery charging ammeter (para 4-63).
15. AC VOLTMETER DOES NOT INDICATE VOLTAGE.
Step 1.
Step 2.
Step 3.
Defective Volt-Amp transfer.
Replace switch (para 4-63).
Defective voltage adjust rheostat.
Replace defective voltage adjust rheostat (para 4-63).
Defective ac voltmeter.
Replace ac voltmeter (para 4-63).
16. AC VOLTMETER INDICATES VOLTAGE, BUT FREQUENCY METER IS OFF SCALE.
Step 1.
Step 2.
Step 3.
Engine speed too slow.
Adjust frequency rheostat (Precise sets only) (para 2-6). Increase engine speed with manual speed
control (utility sets only) (para 2-6).
Defective frequency meter.
Replace frequency meter (para 4-63).
Defective frequency transducer.
Replace frequency transducer (para 4-63).
4-15
