Electrical Circuits - Jacobsen AR-522 Dealer's Manual

5 TROUBLESHOOTING
5.3

ELECTRICAL CIRCUITS ____________________________________________________

When troubleshooting the machine using the controller always
check that Program Active lamps (2) is on. This indicates that
the controller has power and the program is active.
NOTICE
The controller requires a minimum of six volts to operate.
Individual circuits can be tested by operating an input switch,
checking for the required input signal and looking for a
corresponding output. Keep in mind that not all switches are
located on the instrument panel. The traction pedal, reel lift limit
and brakes are controlled by small proximity switches mounted
on the frame of the mower.
If an input lamp does not light, an inactive condition is indicated.
This could be caused by a fuse, faulty switch or poor
connection.
The electrical connections to the solenoids on the hydraulic
valves are also equipped with small indicator lamps. When lit,
these lamps indicate that the output signal has reached the
connection. If lamps do not come on, check wires to and from
connector.
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