6-13
WARNING
Many troubleshooting procedures present hazards that can result in severe personal inju-
ry or death. Only qualified service personnel with knowledge of fuels, electricity, and machinery haz-
ards should perform service procedures. Review safety precautions on page iii.
TABLE 6-5. SPEC A CONTROL TROUBLESHOOTING – BATTERY CHARGE MODE
Trouble Possible Cause Corrective Action Section/
Page
Low Battery 1. Weak or discharged battery due to: 1a. Replenish electrolyte and recharge
Voltage a. Low electrolyte level in battery. battery.
b. Long periods of non-use. 1b. Connect a separate battery charger to
c. Improperly wired battery. bring battery up to full charge.
d. Load connected to battery while set 1c. Reconnect and check battery connec-
is turned off. tion.
e. Too much DC load on genset 1d. Disconnect load and recharge
starting battery. battery.
1e. Remove other DC loads from genset
starting battery.
2. Genset charging circuit not 2a. Check all wiring connections between
functioning due to: the generator B1-B2 windings and the
a. Open in circuit between generator Battery B+ connection, including all
B1-B2 winding and battery (B+). connections to the diode bridge (CR1)
b. Open charging resistor (R 1). and battery charge resistor (R1).
c. Diode bridge (CR1) defective. 2b. Remove wires from the charge resistor 7-8
d. Generator B1–B2 defective. (R1) and measure its resistance.
A normal reading is 4 to 6 ohms.
2c. Refer to diode bridge (CR1) test. 7-8
2d. Refer to generator test section. 9-8
NOTE: The battery charging circuit is designed to maintain the genset starting battery. The charging cir-
cuit will not charge a low or bad battery. A low battery should be charged up with a battery charger.
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