Ce-niehoff-co C651/C654 Troubleshooting Guides Manual de usuario descargar pdf (Pagina 5)

Page 5

TG0010C

Section 3: Advanced Troubleshooting

(CONT’D)

Yes

System is overloaded. Check for

excessive draw from

accessories.

With engine running, measure voltage at low battery B+ terminal. See ➀ in Figure 3 on page 4.

Is voltage equal to regulator set point or no more than 1 V below set point?

Chart 2 – RED LED On Steady – No Alternator Output – Test OVCO Circuit

Yes

Replace existing regulator with known good regulator. Run engine.

Does OVCO trip?

Alternator is defective.

Original regulator is defective.

Yes

Original regulator is defective.

Replace regulator with known good regulator. Run engine. Does OVCO trip?

Chart 1 – AMBER LED On Steady – No Alternator Output – Test OVCO Circuit

Alternator is defective.

Make sure batteries are properly charged before proceeding.

LED COLOR STATUS

TABLE 2 – A2-306 Regulator Diagnostics

Alternator and regulator operating normally.GREEN Flashing

(key on, engine running)

ACTION

No action required.

See Chart 1 below.

AMBER Steady

(key on, engine off)

Flashing

High or low battery tripped OVCO.

See Chart 2 below.

RED Steady

(key on, engine off)

Flashing

Flashing both

colors

Low battery amp draw exceeds 125 amps.

Low battery tripped OVCO.

Alternator not rotating or 14 V output

voltage unstable.

1. Check battery, system cable connections

and grounds.

2. Perform load analysis.

3. If OK, replace alternator.

GREEN/

AMBER

28 V output voltage unstable.

1 2 3 4 5 6 7 8

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