Stiga MP 84/98 Workshop Manual page 73

WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
General informations:
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Related topics:
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Map of functional units
ELECTRONIC CARD OPERATION CHECK
To make this tests it is necessary to have:
– The key in the «ON» position
– Connector (1) connected to the card.
In this situation the pilot lamp should come on.
A) Card supply
This check is done with the tester in Voltmeter func-
tion (Volt DC 0 ÷ 20), with the black ferrule on terminal
1 and the red ferrule on terminal 11 of the wiring con-
nector (1).
The reading on the tester shows the battery's vol tage.
B) Safety and service supply check
This check is done with the tester in Voltmeter func-
tion (Volt DC 0 ÷ 20), with the black ferrule to earth
and the red ferrule on terminal 10 of the wiring con-
nector (1).
The reading on the tester shows a slightly lower bat-
tery voltage value than that produced by the test de-
scribed in section "A".
C) Checking the operation of the self-setting
protection
By connecting terminal 10 of the connector (1) to the
frame's earth, the pilot lamp should go out due to the
protection cutting in; eliminating the connection to
earth, the pilot lamp should come on again.
NOTE During this test, the self­setting protection
reaches very high temperatures (around 160 °C)
which are to be considered normal. Similarly, there
might be so me smoke inside the transparent box
which is due to the overheating of the powder inside.
WARNING! Do not touch this component of
the card until it has cooled down.
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