MarelliMotori MEC-20 Manuel Utilisateur page 39

Possible failure causes:
- Mechanical damage due to impact/shock.
- Improper connection on terminals + and -.
- Short circuit between terminals + and -.
- Not enough contact between the AVR terminals and the FASTON connectors, resulting in sparks and
voltage peaks.
Actions:
- Replace the AVR.
13. MAINTENANCE
The only preventative maintenance required for the regulator is to check the connections between the regulator
itself and the system: make sure they are clean and tight and that the cabling shows no imperfections or damage.
The M31FA600A is a surface mounting (SMD) circuit board protected by a polyurethane resin that protects the
device from dampness, dust and aggressive environments: in case of malfunction or damage of any type, any
modifications, repairs or adaptations not previously approved by Marelli Motori are forbidden.
14. ASSISTANCE
For any questions regarding the connection diagrams, information or any board malfunction, damage or problem,
contact Marelli Motori Service.
Marelli Motori
Via Sabbionara 1
36071 Arzignano (VI)
Italy
T +39 0444 479 711
F +39 0444 479 888
info@MarelliMotori.com
sales@MarelliMotori.com
service@MarelliMotori.com
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