Service manual

3. Electrical Parts
3-17
Pin
No.
Line
color
Connection Function
7 G/W
Engine water temperature
switch for emergency stop
During normal operation, engine water temperature
switch is kept ON. The contact between No.1 and
No.8 terminals becomes OFF at the condition OFF
of engine water temperature switch, it cuts electric
supply to solenoid (motor stopper) relay so that
engine can be stopped.
●Emergency stop setting temperature
SDG25S,45S
: 230°F (110℃)
SDG65S,100S : 221°F (105℃)
Starter switch ACC terminal
8 R/Y
Auto start unit No.7 terminal
Power supply for excitation of solenoid (motor
stopper) relay
9 R/W 10A fuse
Power supply for output to 3 phase breaker shunt
coil and auto start unit No.3 terminal
Starter switch ACC terminal
10 R/Y
Auto start unit No.7 terminal
Power supply
11 L/W Auto start unit No.4 terminal
During normal operation, there is no conductivity.
During auto start operation, even after cranking
operation is performed three times, it will not start.
When it becomes difficult to start, starting difficulty
signal begins from auto start unit No.4 terminal.
Controller No.11 terminal receives this signal to
ignite overcrank warning lamp.
12 G/Y
Air filter differential pressure
indicator
During normal operation, air filter differential
pressure indicator becomes OFF.
When air filter differential pressure indicator goes
ON to ignite air filter clogging lamp.
●Set differential pressure for actuation
: more than 6.2kPa
※5
13
G/R
Emergency stop engine oil
pressure switch
During normal operation, engine oil pressure is ON.
When No.6 terminal receives generation signal of
alternator, and engine oil pressure is OFF, contact
between No.1 terminal and No.8 terminal becomes
OFF and it cuts conductivity to solenoid (motor
stopper) relay for engine emergency stop.
●Set pressure for emergency stop
SDG25S, 65S,100S
: less than 14.2psi (0.1MPa)
SDG45S : less than 21.3psi (0.15MPa)
※1：Color in parenthesis shows the line color of SDG100S.
※2：Connection point in parenthesis shows that of SDG65S/100S.
※3：Connection point in parenthesis shows that of SDG100S.
※4：Connection point in parenthesis shows that of SDG45S/65S.
※5：Abnormality detection by No.13 terminal is performed by delay timer at start up and alternator
generation signal is inputted to CN2-6 terminal. Then after about 10 seconds later, the abnormal
detection circuit begins to function.