Westerbeke 20.0KW sbeg Spezifikationen PDF herunterladen (Seite 20)

SAFETY

SHUTDOWN

SENSORS

AND

SWITCHES

SAFm

SHUTDOWN

SWITCH/SENSORS

The engine is protected

by

four automatic

shutdown

circuits.

Should a shutdown

occur,

do not attempt to resflJtt without

finding

and

correcting the cause. Refer to the

heading

Engine statts, runs

and

then shuts down

in

the

ENGINE

TROUBLESHOOTING section of this

manual.

The following

is

a description of

these

automatic

shutdown

circuits:

lil.-.

Exhaust

Temperature

Switch

An exhaust temperature switch

is

located

on

the

water

injected exhaust

elbow.

Normally closed, this

switch

will

open

and the ECU will interpret this

as

a

high

exhaust

temperature and open

the

K2

run

relay,

stopping

the

generator. The exhaust temperature

LED

on

the

panel

will

illuminate. The switch

opens

at

26(}.270F

(I27-132C).

This

switch resets (contacts close)

at

approximately 225F (I07C).

HIGH

EXHAUST

.

nMPERATURE

SWITCH

water

Temperature

Sensor

If

fi

MOUNTED

ATTHE

EXHAUST

ELBOW

A water temperature sensor

is

located at

the

thermostat

housing. This sensor

sends

a

DC

voltage to

the

ECU

that

it

interprets

as

engine antifreeze coolant temperature.

Should

this

voltage reach a set

value,

the

ECU

will

interpret

this

as

high antifreeze coolant temperature and

open

the

K2

run

relay,

stopping

the

generator.

The overheat

LED

on

the

panel

will

then illuminate.

Oil

Pressure

Sensor

An

oil

pressure sensor

is

located off

the

engines

oil

gallery.

Oil

pressure

on

the

sensor

affects

the

DC

voltage

through

the

sensor to

the

ECU.

Should

the

voltage

reach

a preset

value,

the

ECU

will

interpret

this

as

a

low

oil

pressure

issue

and

open

the

K2

run

relay,

stopping

the

generator.

The

oil

pressure

LED

on

the

panel

will

illuminate.

Engine

DC

Circuit

Breaker

OIL

PRESSURE

SENSOR

The generator's engine DC circuit

is

protected

by

a rocker

type

DC

20

amp

breaker

mounted

on

the

control

box.

This

also serves as an Emergency Stop Switch. Excessive

DC

current draw

or

DC

electrical overload anywhere

in

the

instrument

paneJ

wiring

or

engine

wiring

will

cause

the

breaker to

trip

to

the

OFF

position.

In

this

event,

the

DC

power to

the

ECU

will

be

interrupted, stopping

the

generator.

No

panel

LED

will

illuminate. Check

and

repair

the

source

of

the

problem. After repairing

the

fault,

reset

the

breaker

and

restart the

generator.

Hlgh/Low

RPM

Shutdown

Should the generator's

RPM

go

above

20%

of

the specified

1800 rpm @ 60 HzJI500

rpm

@ 50 Hz, the ECU

will

shut

the engine

down

on

an

over speed fault

and

illuminate

the

over speed

LED

on

the

control

panel

and

remote start/stop

panel

when

installed

Should the generator's

RPM

fall

below

20%

of the specified

1800

rpm @ 60

HZ/15oo

rpm @ 50

Hz,

the ECU

will

shut

the

engine

down

on

an

under speed fault

and

this

will

cause

the over speed

LED

to

flash.

The

OBD

(On

Board

Diagnostic)

will

also

show

these

faults.

Engines & Generators

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