Ce-niehoff-co C802/C802D/C820 Troubleshooting Guides Manuel d'utilisateur télécharger pdf

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TG0004E

Table of Contents

Section A: Wiring Diagram ......................................2 – 3

Section B: Basic Troubleshooting ................................. 4

Section C: Advanced Troubleshooting ...................5 – 10

Hazard Deﬁ nitions

These terms are used to bring attention to presence of hazards

of various risk levels or to important information concerning

product life.

Indicates presence of hazard(s)

that will or can cause minor personal

injury or property damage if ignored.

Indicates special instructions on

installation, operation or mainte-

nance that are important but not

related to personal injury hazards.

CAUTION

NOTICE

C802/C802D/C802TD/C820 Alternators

Troubleshooting Guide

Battery Conditions

Until temperatures of electrical

system components stabilize, these

conditions may be observed during

cold start voltage tests.

• Maintenance/Low Maintenance Battery:

— Immediately after engine starts, system volts

measure lower than regulator setpoint and

system amps measure at a medium level.

— 3-5 minutes into charge cycle, volts increase and

amps decrease.

— 5-10 minutes into charge cycle, volts reach

regulator setpoint or very close, and amps

decrease to a minimum.

— Low maintenance battery has same characteris-

tics with slightly longer recharge times.

• Maintenance-free Battery:

— Immediately after engine starts, system volts

measure lower than regulator setpoint with low

charging amps.

— Once the charge cycle begins, low volts and low

amps are still present.

— After the alternator energizes, voltage will

increase several tenths. Amps will increase

gradually, then quickly, to medium to high amps.

— Finally, volts will increase to setpoint and amps

will decrease.

The time it takes to reach optimum voltage and am-

perage will vary with engine speed, load, and ambient

temperature.

• High-cycle Maintenance-free Battery:

— These batteries respond better than standard

maintenance-free. Charge acceptance of these

batteries may display characteristics similar to

maintenance batteries.

NOTICE

Charge Volt and Amp Values

Volt and amp levels fluctuate depending on the battery

state of charge. If batteries are in a state of discharge—

as after extended cranking time to start the engine—

system volts will measure lower than the regulator set-

point after the engine is restarted and system amps will

measure higher. This is a normal condition for the

charging system; the greater the battery discharge level,

the lower the system volts and the higher the system

amps. The volt and amp readings will change as batter-

ies recover and become fully charged: system volts will

increase to regulator setpoint and system amps will

decrease to low level (depending on other loads).

• Low Amps: Minimum or lowest charging system

amp value required to maintain battery state of

charge, obtained when testing the charging system

with a fully charged battery and no other loads

applied. This value will vary with battery type.

• Medium Amps: System amps value which can cause

the battery temperature to rise above adequate

charging temperature within 4-8 hours of charge

time. To prevent battery damage, the charge amps

should be reduced when battery temperature rises.

Check battery manufacturer’s recommendations for

proper charge amp rates.

• High Amps: System amps value which can cause

the battery temperature to rise above adequate

charging temperature within 2-3 hours of charge

time. To prevent battery damage, the charge amps

should be reduced when battery temperature rises.

Check battery manufacturer’s recommendations for

proper charge amp rates.

• Battery Voltage: Steady-state voltage value as mea-

sured with battery in open circuit with no battery

load. This value relates to battery state of charge.

• Charge Voltage: Voltage value obtained when the

charging system is operating. This value will be

higher than battery voltage and must never exceed

the regulator voltage setpoint.

• B+ Voltage: Voltage value obtained when measuring

voltage at battery positive terminal or alternator B+

terminal.

• Surface Charge: Higher than normal battery voltage

occurring when the battery is disconnected from

battery charger. The surface charge must be removed

to determine true battery voltage and state of charge.

• Significant Magnetism: Change in strength or

intensity of a magnetic field present in alternator

rotor shaft when the field coil is energized. The

magnetic field strength when the field coil is ener-

gized should feel stronger than when the field is not

energized.

• Voltage Droop or Sag: Normal condition occurring

when the load demand on alternator is greater than

rated alternator output at given rotor shaft RPM.

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

Page 1 - Troubleshooting Guide

Page 1TG0004ETable of ContentsSection A: Wiring Diagram ...2 – 3Section B: Basic Troubleshooting ...

Page 2 - Section A: Wiring Diagram

Page 10TG0004EIf you have questions about your alternator or any of these test procedures, or if you need to locate a Factory Authorized Service Distr

Page 3

Page 2TG0004ESection A: Wiring DiagramCEN C820 Alternator Description and OperationC820 28 V/14 V, 150 A/150 A alternator is internally rectified. All

Page 4

Page 3TG0004ESection A: Wiring Diagram(CONT’D)Figure 3 — C802/C802D/C802TD Alternator with RegulatorFigure 4 — C820 Alternator with Regulator*Thermal

Page 5 - Troubleshooting

Page 4TG0004EBasic Troubleshooting1. Inspect charging system components for damage Check connections at B– cable, B+ cable, and regulator harnes

Page 6 - SOCKET CONNECTIONS

Page 5TG0004ESection C: Advanced TroubleshootingA2-213 Regulator on C802 AlternatorDESCRIPTION AND OPERATIONA2-213 regulator is either attached direc

Page 7

Page 6TG0004ESection 3: Advanced TroubleshootingChart 1 – C802 – No Air-Conditioning/NO ALT OUTPUT Light On(CONT’D)YesNoConnect DMM red lead to D+ (o

Page 8

Page 7TG0004ESection 3: Advanced Troubleshooting(CONT’D)Chart 2 – C802 – No Alternator Output – Test Charging CircuitTest for battery voltage at alte

Page 9

Page 8TG0004E(CONT’D)Section 3: Advanced TroubleshootingRepair vehicle circuit to IGN terminal. Vehicle charging circuit test is complete.Set DMM to

Page 10 - (CONT’D)

Page 9TG0004ESection 3: Advanced Troubleshooting(CONT’D)Test for battery voltage at both alternator 28 V and 14 V B+ terminals. Does bat-tery voltage

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Ce-niehoff-co C802/C802D/C820 Troubleshooting Guides Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Ce-niehoff-co C802/C802D/C820 Troubleshooting Guides. C.E. Niehoff & Co. C802/C802D/C820 Troubleshooting Guides User Manual Manuel d'utilisatio

Résumé du contenu

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