20
tHe eCo28 alternator operators' Handbook
7. troublesHootInG
prelImInary notes
WarnInG
Troubleshooting must be performed
by qualified persons who are
conversant with the hazards of
electricity and machinery.
Problem
Method of Correction
The alternator fails to excite.
Replace the fuse.
If possible, increase the speed by 15%.
Carry out the instructions given in "06.7 Residual
Voltage Check".
After being excited the alternator does not
excite.
Check the correct connections were used when
making the residual voltage check".
Low voltage at 'no load'.
Reset the voltage (VOLT) potentiometer.
Check the engine speed.
Check the alternator windings.
High voltage at 'no load'.
Reset the voltage (VOLT) potentiometer.
Replace the AVR.
On 'On load' conditions, the voltage is
lower than the rated value.
Reset the voltage (VOLT) potentiometer.
Current too high, power factor lower than 0.8, speed
lower than 4% of rated speed.
Replace the AVR.
Check the diodes, disconnect the cables.
On 'On load' conditions, the voltage is
higher than the rated value.
Reset the voltage (VOLT) potentiometer.
Replace the AVR.
The voltage is unstable.
Check uniformity of rotation.
Regulate the stability of the regulator by adjusting
the 'STAB' potentiometer.
This section is designed primarily for
use by trained technicians although it
does give sufficient information to offer
a guide to the operator.
In cases of difficulty please contact
Lister Petter.
Summary of Contents for T Series
Page 1: ...GENERATING SET OPERATORS HANDBOOK T SERIES ...
Page 2: ...TR Engines Operators Handbook LPG 027 08265 1 T series ...
Page 5: ...4 ...
Page 7: ...6 ...
Page 44: ...43 ...
Page 46: ...LPG 027 08074 1 SLG SLL 16 18 SERIES Alternator Operators Handbook ORIGINAL INSTRUCTIONS ...
Page 48: ...3 CONTENTS Introduction 4 Safety Precautions 5 Application 6 Service and Maintenance 9 ...
Page 58: ...LPG 027 08175 1 The ECO28 Alternator Operators Handbook ...
Page 79: ...22 THE eco28 alternator operators handbook Figure 8 2 Terminal Box Layout ...