Doosan DX225LC, Manual, Page: 13 / 136

Electrical System SP000935
Page 12
ENGINE STARTING CIRCUIT
Start Operation
When the starter switch is turned to the "START" position, the
"S" and "E" terminals of the starter controller (7) are connected.
At this time the contacts in the starter relay (8) are closed by the
current flow from the battery (1)
o
fusible link (3)
o
fuse box (6)
o
"B" terminal of starter switch (5)
o
"C" terminal of starter
switch (5)
o
"30" terminal of starter relay (12) - "87a" terminal
o
"C" terminal of starter relay (8) - "D" terminal
o
"S" terminal of
starter controller (7) - "E" terminal
o
ground.
When the contact point "B" and "PP" of starter relay (8) are
connected, the pinion gear of the starter (9) is pushed forward
and makes contact with the ring gear of the flywheel and the
internal contacts of the starter are connected. The current flows
from the battery (1)
o
"A" terminal of the battery relay (2)
o
"B"
terminal of the battery relay (2, Figure 3)
o
"B" terminal of the
starter (9). The starter motor is rotated and the engine is started.
If the instrument panel has the password function activated,
input number should match the set number, otherwise the start
circuit closes and the engine does not start.
NOTE: If the security system is "LOCKED," a four-digit
password will be required to start the engine. If the
system is "UNLOCKED," no password will be
required and this display screen will not appear.
In the event the security system is locked, current
flows from battery (1)
o
fusible link (3)
o
fuse box (6)
o
"B" terminal of starter switch (5)
o
"ACC" terminal
of starter switch (5)
o
"86" terminal of starter relay
(12)
o
"85" terminal of starter relay (12)
o
"CN1-15"
terminal of e-EPOS (13)
o
ground. This current flow
causes the coil in starter relay (12) to be activated,
opening contacts at "87a" terminal. This prevents
starter relay (8) from functioning.
C H C
E F
H
02/05 [MO] 11:30
E/G SPEED
0
RPM
FG001445
ENTER
PASSWORD
Figure 2