Doosan 10/370, Operation And Maintenance Manual

Page: 87 / 96

Electrical Operating & Maintenance Manual
87
Troubleshooting Flow Chart
PROBLEM CHECK LIST
Control panel key is turned to “ON’
position, WEDGE controller
annuciator lamps and 4 digit LED
display do not come on Check F1 fuse
Check operation of switch S1
Check wiring from S1 to WEDGE
controller
Checking battery voltage, ensure
battery disconnect switch is turned ON
Wedge controller annuciator lamps &
4 digit LED display initialize OK but
alternator lamp and engine oil
pressure lamps do no blink. J1939 CAN communications not
working
Check for 24FDC key switch at engine
CAN network wiring problem
Ensure 24VDC power to engine ECM
Check connector pins
Engine cranks but will not start Ensure key switch (24VDC) at engine
Frozen fuel cooler or associated
piping
Estop button pressed (ESA units) or
Estop jumpers not making connection
Clear active engine fault code
Engines does not crank when key
turned to crank position Check switch S1
Check relay K1
Check starter solenoid
Check starter motor
Check WEDGE output to K1 relay
Check battery voltage
Compressor fails to load when
“Service Air” switch pressed Check Run/Start valve operation
Verify frequency throttle signal at
engine
Check “Service Air” switch operation