Keypad; Test Of Led; Test Of Buttons - Husqvarna 967187001 Workshop Manual

11.4 Keypad

11.4.1 Test of LED

During this trouble shooting we assume that
+5 V is OK.
While testing the LEDs, all the possible states of
the LED indicators are stepped through while see-
ing that they are turned on and off as they should.
If any of these LEDs does not come on or go off,
or two LEDs or more are on at the same time, then
there is something wrong. Then change the control
panel and perform the test again, if the fault per-
sists look for the cause in the machine's cables.

11.4.2 Test of Buttons

Functional description of control panel
CCU controls these LEDs separately. A lead goes
to each LED on the control panel from CCU.
These LEDs are turned on when the CCU sends a
current limited voltage to each LED, which means
that a short circuit cannot destroy CCU.
All the LEDs are green. If the battery has a very
weak charge, a red LED will come on in the bottom
field of the bar to indicate low battery voltage.

Keypad

Leds
Buttons
Connector A at CCU
A1: Lift_SW
A2: Start_SW
A3: Eco_SW
A4: Charger_IN
A5: Start_LED
A6: Error_LED
A7: Battery 100%_LED
A8: Battery 75%_LED
A9: Battery 50%_LED
A10: Battery 25%_LED
A11: Battery_low_LED
A12: Eco_LED
CST Autotest
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