Ce-niehoff-co C701/C701A Troubleshooting Guides User Manual download pdf

Page 1

TG3E

Table of Contents

Section A: Wiring Diagram ........................................... 2

Section B: Basic Troubleshooting ................................. 3

Section C: Advanced Troubleshooting .....................4 – 8

Battery Conditions

Until temperatures of electrical

system components stabilize, these

conditions may be observed during

cold start voltage tests.

• 

— 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.

• 

— 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.

• 

— These batteries respond better than standard

maintenance-free. Charge acceptance of these

batteries may display characteristics similar to

maintenance batteries.

NOTICE

Hazard De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

C701/C701A Alternators

Troubleshooting Guide

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).

•  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.

•  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.

•  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.

•  Steady-state voltage value as mea-

sured with battery in open circuit with no battery

load. This value relates to battery state of charge.

•  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.

•  Voltage value obtained when measuring

voltage at battery positive terminal or alternator B+

terminal.

•  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.

•  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.

•  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

Summary of Contents

Page 1 - Troubleshooting Guide

Page 1TG3ETable of ContentsSection A: Wiring Diagram ... 2Section B: Basic Troubleshooting ...

Page 2 - Section A: Wiring Diagram

Page 2TG3ESection A: Wiring DiagramCEN C701/C701A Alternators Description and Operation 28 V, 300 A alternators are internally recti-fied. A

Page 3

Page 3TG3EBasic Troubleshooting1.  Check connections at B– cable, B+ cable, and regulator harness.

Page 4 - Troubleshooting

Page 4TG3ESection C: Advanced TroubleshootingA2-213 RegulatorA2-213 regulator is either attached directly to the out-side of

Page 5 - 

Page 5TG3ESection C: Advanced Troubleshooting (CONT’D)Figure 3 – Alternator-to-Regulator Harness PlugChart 1 – No Alternator Output – 

Page 6 - SOCKET CONNECTIONS

Page 6TG3ESection C: Advanced Troubleshooting(CONT’D)Chart 2 – No Air-Conditioning/Alternator Warning Light OnYesNoConnect DMM red lead to D+ (or P)

Page 7

Page 7TG3ESection C: Advanced Troubleshooting (CONT’D)Test for battery voltage at alternator B+ terminal. Does battery voltage exist?YesNoRepair vehic

Page 8

Page 8TG3ESection C: Advanced Troubleshooting (CONT’D)Repair vehicle circuit to IGN terminal. Vehicle charging circuit test is complete.Set DMM to dio

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Ce-niehoff-co C701/C701A Troubleshooting Guides User Manual

Browse online or download User Manual for Hardware Ce-niehoff-co C701/C701A Troubleshooting Guides. C.E. Niehoff & Co. C701/C701A Troubleshooting Guides User Manual

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