Stiga TC 108 SD Workshop Manual page 65

WORKSHOP MANUAL
TC 108 SD - TC 118 SD
PROBLEM
3. The dashboard switches on but, with
the key in position «START», the starter
does not turn or lacks power (poor start-
ing)
4. The starter turns but the engine does
not start
5. The starter continues to turn after
engine has started, and does not stop
when the key is removed
6. The starter operates as soon as the
key is in the «ON» position, and can be
turned off only by removing the key
7. The battery warning light does not come
on with the key in position «ON» but the
machine operates
8. The battery warning light remains on
IMPORTANT Faulty electronic cards must always be replaced without trying to repair them or re place single components.
TROUBLESHOOTING OF THE ELECTRICAL
SYSTEM
CAUSE
The battery is not supplying sufficient current
Badly earthed battery, or the starter relay or engine not
earthed
Starting not permitted
Malfunction in the electronic card
Starter relay is faulty
No fuel flowa
Impaired starter system
Mechanical difficulties with the contact breakers of the
starter relay
Starter works erratically for mechanical or electrical
reasons taking excessive current and causing binding
of relay contacts
Fault in the card
Starter block operating faults
Fault in the electronic circuit or in the signalling LED
Insufficient charge
Charger fuse blown
CHAPTER REVISION
7.1 0
REMEDY
Recharge the battery
Check and put right
After checking that the conditions are met, check all the micros-
witches and the relative wiring
Try replacing the card with one that is known to work
Check that the starter relay is activated
Check the leads for the carburettor solenoid valve opening con-
trol (if provided) or check the fuel stopcock and filter
Check that the spark plug cap is positioned correctly
Check that the spark plug electrodes are clean and have the
correct gap
Replace the starter relay
Check the starter
Replace the panel/board group (NOTE: it is possible to com-
plete the work in any case, but the panel/board group must be
replaced as soon as possible)
Replace the block
Replace the panel/board group (NOTE: it is possible to com-
plete the work in any case, but the panel/board group must be
replaced as soon as possible)
Check that the charging cable has not detached
Check that there are no current leakages caused by cables with
damaged insulation
Check the recharge circuit
Replace fuse (25 A) and check the recharge circuit
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