MarelliMotori M8B 315, Инструкции и информация по безопасности

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ENGLISH
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6. TROUBLE SHOOTING AND REPAIRS
TROUBLE POSSIBLE CAUSE REMEDY
(always to be done with the machine switched off)
The alternator will not
energise (no load voltage
below 10% of rated
voltage) a) Loose connections
b) Rotating diodes or surge suppressor
broken
c) Excitation circuit shorted or interrupted a) Check and repair
b) Check the diodes and change in case they are open or
shortcircuited
c) Check the continuity and repair
The alternator will not
energise (no load voltage
20-30% of rated voltage.
Voltage insensitive to AVR
potentiometer's rotation a) Fuse (on AVR’s supply line) blown
b) Connection's cut on the exciter stator
c) Incorrect connections of exciter stator a) Replace the fuse with the spare. If the fuse blows again
check if the exciter stator is short circuited. If everything is
correct, change the AVR
b) Check the continuity and repair
c) Reverse the two wires from the exciter stator
Voltage lower then rated
(output voltage between 50
and 70%) a) Speed less than rated
b) Voltage potentiometer unset
c) Fuse blown
d)Faulty regulator a) Check rpm (frequency)
b) Rotate the potentiometer until the voltage reaches the
rated value
c) Replace the fuse with spare
d)Disconnect AVR and replace it
Voltage too high a) Potentiometer V unset
b) Faulty regulator a) Rotate the potentiometer until the voltage reaches the
rated value
b) Replace AVR
Unstable voltage a) Diesel engine rpm variations
b) Stability potentiometer unset
b) Faulty regulator a) Check rpm uniformity. Check the diesel engine governor
b) Act on AVR’s stability potentiometer.
b) Replace AVR
7.SPARE PARTS – NOMENCLATURE
Pos Part Name Type / Code
M8B 315 M8B 400 M8B 500
201 D side (D:E) bearing
6319 C3 / 346151095 6324 C3 / 346151120 6328 C3 / 346151140
202 N side (N.D.E.) bearing
6315-Z C3 / 346113275 6318-Z C3 / 346113290 6326 C3 / 346151130
6 Voltage regulator
M40FA610A
12 Varicomp
M40FA621A
7 Fuse 10A-500V (6,3x32)
963823010
309 Rotating diode (inverse)
71 HFR 120 / 963821170 71HFR 120 / 963821056
310 Rotating diode (direct)
71 HF 120 / 963821171 71 HF 120 / 963821057
311 Surge suppressor
M40FA990A
307 Filter
M50FA873A
308 Surge suppressor
963827007
119 Complete rotating rectifier
M40FA500A M50FA301A