Doosan B20S-3 - DC-DC Converter

81
MicroController Control System Troubleshooting
Problem 27 (continued)
No voltage output.
Measure the voltage from (POS INPUT) to (NEG INPUT).
Battery voltage 0 volt
Replace fuse and check wiring for shorts. If no
shorts are found and the fuse continues to fail,
replace the DC-DC converter.
Measure the voltage from the B+
cable at the line contactor to the (NEG INPUT)
terminal of the DC-DC converter.
Battery voltage 0 volt
Repair open negative
connection from converter
(NEG INPUT) to battery
negative.
Repair or replace faulty wiring.
Replace the DC-DC converter.
Check for open fuse or wiring between the line
contactor and the (POS INPUT) terminal of the
DC-DC converter.
Open fuse Open wiring