Doosan 10/105CWJD, Electronic Service Manual

Page: 19 / 139

Book: 23227143 (8-24-2010) Rev C
Page 17
Operational Information
Models
P425WJD (7/120), XP375WJD (9/110), HP350WJD (10/105), & (14/85)
Power On
When the Ignition switch is turned to the “ON” position:
•
Keyswitch signal (24 VDC) supplied to engine ECM from WEDGE.
Startup
When the Ignition switch is turned to the “START” position:
•
Engine starter is energized.
•
Start/Run solenoid valve (L1) is opened (energized).
When the engine speed reaches 600 RPM (engine start declared):
•
Engine starter is de-energized.
•
Engine speed is set to 1600 RPM.
When the engine speed reaches 1450 RPM:
•
Start/Run solenoid valve (L1) is closed (de-energized).
When the separator tank reaches 50 psi:
•
Start/Run solenoid valve (L1) is opened (energized).
After 5 seconds:
•
Engine speed is set to idle. (1600 RPM until engine coolant temperature reaches
100
o
F, then idle is set to 1500 RPM).
Load
When the Service Air switch is pressed:
•
Engine speed is set to 2200 RPM.
When the engine speed reaches 2000 RPM:
•
Start/Run solenoid valve (L1) is closed (de-energized).
After 2 seconds, if the regulation system pressure is 4 psi or greater:
•
Engine speed control is engaged.