WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
CHAPTER REVISION FROM ... PAGE
7.1 0 2018 3 of 3
TROUBLESHOOTING OF THE ELECTRICAL
SYSTEM
IMPORTANT Faulty electronic cards must always be replaced without trying to repair them or re place single components.
PROBLEM CAUSE REMEDY
9. The engine stops while in use for rea-
sons not due to the safety devices cut-
ting in
The safety devices have cut in or are faulty
Check the operation of the microswitch operation and the rel-
evant wiring
Accidental detaching of an electrical wire Check all wiring
Starting of engine not permitted
After checking that the conditions are met, check all the micros-
witches and the relative wiring.
10. The 10 A fuse cuts in
Short circuit or overload on the power side of the card
(ignition block, starter relay, headlamps and recharger
connector)
Find and replace the defective user
Short circuit or damage to the electronic card protec-
tion (power side)
Try changing the card with one that is known to work. If the prob-
lem stops, replace the faulty card
11. The 25 A fuse cuts in Faults in the battery charging circuit Replace fuse (25 A) and check the recharge circuit
12. No audible signal for the “grass-catch-
er full” condition
Malfunctioning or faulty blade switch or microswitch
and grass-catcher signalling
Check the switch, the microswitch and wiring.
WARNING! - Check that the blade switch stops the engine or
prevents if from being started if the acknowledgement condi-
tions are not met
Malfunctioning or faulty electronic card
Try changing the card with one that is known to work. If the prob-
lem stops, replace the faulty card
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