MarelliMotori M31FA600A M EC-20 Manual De Instrucciones página 38

#2 - VISUAL / MULTI-METER CHECKS
CHECK B – Fuse
(Fuse)
Visual inspection:
- Check that the fuse is not broken or
blown.
- Check that the fuse holder blades
are tightly in place around fuse
terminals A and B.
- Check whether there is any resin
and/or dirt between the fuse holder
and the fuse terminals.
Multi-meter check:
1- Remove the fuse from the fuse
holder.
2- Select the resistance measurement
mode on the multi-meter.
3- Connect the multi-meter probes to
pins A and B of the fuse and check
that the measured resistance is <
1Ω. If it is not, the fuse has to be replaced.
Check result:
- If the result of all the above checks has been positive, tick the ok box in section #2 of the report
form, Check B.
Otherwise leave the box blank.
In case of component failure:
Possible effects on regulation:
- The alternator output voltage is lower than the rated voltage and equal to the residual one.
You cannot set the proper value using the VOLT trimmer.
Possible failure causes:
- Mechanical damage due to impact/shock.
- Presence of resin on the fuse terminals and/or on the fuse holder blades.
- Not enough contact between the fuse and the fuse-holder.
- Improper connection.
- Exciter failure: check the insulation of the exciter with a megaohmmeter (insulation is appropriate if
resistance is >30MΩ).
- Short circuit between terminals + and -.
Actions:
- Replace the fuse and try restarting the alternator.
In case of any further fuse failure, replace the AVR.
963857154_H
www.repuestosgruposelectrogenos.es
M31FA600A MEC-20
A
B
37