Westerbeke W-70GA Manual de instalación descargar pdf (Pagina 31)

DUAL

OUTPUT

ALTERNATORS

TROUBLESHOOTING

NOTE:

Before

troubleshooting, make certain that

the

drive

belts

are

tight

and

the

batteries

are

good

condition.

Regulator

Testing

The red "battery sensing"

wire

A connects to the battery, it

must always read battery voltage.

battery voltage is not

present, trace the wire for a bad connection.

The orange wire

S should read 0 volts with the key off, 12

volts [approximately] with the key on.

the readings are

incorrect, trace the wire for a

bad

connection.

The blue

wire F supplies current to the alternator fields, its

voltaae will vary depending

the battery charge or actual

loadl;m.

The readings can vary from 4 to 12 volts with the

key on,

0 volts with the key off.

KEY

VOLTAGE

REGULATOR

DEFECTIVE

KEY

OFF

BAmRY

VOLTAGE

REGULATDR

DEFECTIVE

REGULATOR

TEST

POINTS

AND

PROPER

VOLTAGE

TerminalIColor

Ignition

Off

Ignition

Engine

Running

Brown

volts

-12

volts

14.2

volts

Red

12.6

volts

14.2

volts

Orange

volts

6 - 8

volts

Blue

volts

-11

volts

4 -12

volts

All.

Output

12.6

volts

14.2

volts

Alternator

Testing

The

regulator

functioning

properly

and

the

batteries

are

good

condition.

Test the voltage at the alternator plug with the engine

off-key on. The voltage at the alternator terminal F and

the voltage in the plug [blue wire

from the regulator

should read the same.

2. Hold a screw driver close

[112"]

to the alternator pulley.

voltage is present you should feel the magnetic field.

.not, the problem may be the brushes [worn] or the rotor

[open circuit].

3. Start the engine, at fast idle the output terminals should

indicate 14.2 volts [no load]. A reading

12.6 would

indic~te

the alternator is not performing properly.

Apply a load such as an electric bilge pump, the voltage

should maintain at least 13.8 volts.

volts or less

indicates the alternator is faulty.

NOTES:

When

the

engine

first started, it takes a few moments

for the alternator

"kick in" and take

the

load.

There

is a noticeable change

the

sound

the

engine

and

the

RPM gauge will

excite.

o A slight

whine

normal when

running

with a full load

the

alternator.

When

the

alternator

producing high

amperage,

it will

become very

hot.

When

replacing

the

alternator drive

belts,

always

purchase

and

replace

dual belts

matched

pairs.

Engines

Generators

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 63 64

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Westerbeke W-70GA Manual de instalación Pagina 31

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