
14
Workshop Manual, TPD 1353E, Issue 3
195
Peregrine EDi and 1300 Series EDi
Alternator fault finding
If the warning lamp is not illuminated or there is a reading on the ammeter when the engine is running and the
drive belt is serviceable, the operation of the alternator is correct. If the system is in correct operation, no open
circuit, voltage or current output checks need to be done on the installation unless:
l
The warning light does not show when the alternator is stationary and the switch is in the ‘on’ position or it
illuminates when the alternator is in operation
l
No charge current is shown on the ammeter
l
The battery is discharged
l
The battery is hotter than normal which is an indication of loss of voltage control.
If one or more of the above symptoms occur, the procedure indicated below should be applied.
1 Ensure that the battery is fully charged.
2 Connect a moving-coil voltmeter of good quality, with a range of 0-50 volts, across the positive and negative
terminals of the alternator. If an ammeter is not fitted in the electrical circuit, fit a moving-coil ammeter of good
quality, with a range of 0-100 ampere, in the wire between the alternator and the positive terminal of the
battery.
3 Turn the warning lamp switch to the ‘on’ position (main switch on instrument panel); the warning lamp should
be illuminated.
4 Switch on a 10-15 ampere load, for example, lights, fans, etc.
5 Start the engine and operate it at a fast idle speed; either the warning lamp should be extinguished or the
ammeter indicates a small change in the current in relationship to the engine speed.
6 Increase the engine speed for a moment to near maximum speed, when the charge current should be
approximately equal to the rating for the alternator.
7 Operate the alternator at approximately half speed (engine speed approximately 1500 rev/min) and remove
the electrical load. The voltage should go up to 14 volts for a 12 volt system or 28 volts for a 24 volt system
and then remain constant. At the same time the current reading should show a reduction.
Any change in the above data can indicate a fault and the procedure that follows should be used before any
components are disconnected.
Note: The regulator is a sealed unit and a repair is not possible. If there is a regulator fault, the regulator must
be renewed.
Continued
This document has been printed from SPI². Not for Resale
Содержание 1300 EDi Series
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