Westerbeke 55A FOUR Installationshandbuch PDF herunterladen (Seite 23)

ELECTRICAL

SYSTEM

DESCRIPTION

The

charging system consists

an alternator with a mounted

voltage regulator, an engine

wiring harness, a mounted

circuit breaker, and a battery and connection wires.

Because

the use

integrated circuits (IC's) the electronic

voltage regulator is very compact and is mounted internally

on the back

the alternator.

Alternator

Troubleshooting

you suspect that the alternator is not producing enough

voltage to charge the engine's battery, check the following:

WARNING:

failed

alternator

can

become

very

hot.

not

touch

until

the

alternator

has

cooled

down.

o Make certain your alternator is securely mounted.

o Check the drive belts for proper tension.

WARNING:

Before

starting

the

engine

make

certain

that

everyone

clear

moving

parts!

Keep

away

from

sheaves

and

belts

during

test

procedures.

5. Start the engine.

6. The voltage reading for a properly operating alternator

should be between 13.5 and 14.5 volts.

your alternator

is over-

undercharging, have it repaired at a reliable

service shop.

NOTE:

Before removing the alternator for repair, use your

voltmeter to ensure that

i 2 volts

excitation is present

the R terminal

the previous test showed only battery volt-

age at the B output terminal.

.14

GRAY=====O=~_-r-_

o Inspect for loose

disconnected wires at the alternator.

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~~i#====#14BRDWN

NOTE:

isolator with a diode, a solenoid,

a battery '14

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selector switch is usually mounted in the circuit to isolate the

batteries

the starting battery is

not

discharged along with

the house batteries.

the isolator is charging the starting

battery but

not

the house battery, the alternator

and

the problem is

in the battery charging circuit.

WARNING:

Shut

off

the

engine

battery

switch

disconnect

from

the

battery

when

working

the

engine

electrical

system.

Checking

for

Proper

Voltage

'14

BRD\"'N=====i~@

TYPICAL

AMP

ALTERNATOR

CONNECTIONS

~~~~=f10RED

you suspect the alternator has failed perform the following

tests with the engine off:

.14

RED==f==~~iS-+

......

1. Using a voltmeter, connect the voltmeter red wire clip to

the output terminal B+.

2. Connect the voltmeter negative wire to any ground on the

engine .

. 3. Check the battery voltage. It should read

to 12 volts.

4. Check the voltage between the alternator

(+) positive ter-

minal B and any engine ground.

the circuit is good, the

voltage at the alternator should

the same as the battery

(unless there's an isolator in the circuit, then the reading

would

zero).

CAUTION:

avoid

damage

the

battery

charging

circuit,

never

shut

off

the

engine

battery

switch

when

the

engine

running!

rvvl

WESIERBEKE

I Engines & Generators

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~~::=C:CC3l!§

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BROWN

OPTIONAL

AMP

ALTERNATOR

CONNECTIONS

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 43 44

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