Flowcharts
Rev A 05/01/01 // SB
190113_A
25
3.9
LOAD READING PROBLEM
Measure radius and check with the displayed radius.
Check boom length reading on display.
PROBLEM: Load reading incorrect.
START
Reset length potentiometer. With fully retracted boom, turn potentiometer axle
counter-clockwise until it stops . Refer to Section 3.7.
Check power supply in the central unit between:
X1:20 (+12/24v) and X1:22 (ground) for piston side
and X1:23 (+12/24v) and X1:25 (ground) for rod side.
Refer to Drawing 1 and 4 in Section 4.
Check if mechanical adjustment of angle transducer is correct. Angle transducer
box should be in line with boom and adjusted to actual boom angle.
Refer to Section 3.8.
Check power supply to pressure transducers (piston and rod side). Check each transducer by
unpluging the transducer cable from transducer. Measure voltage at the cable connection
between A (+12/24v) and C (ground) at each connector.
Refer to Drawing 1 in Section 4.
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Correct?
Correct?
NO
YES
Correct?
NO
YES
YES
NO
Fault in pressure transducer cable.
Refer to Drawing 1 in Section 4.
Correct?
YES
NO
Main board defective. Replace main board.
Refer to Drawing 4 in Section 4 and Replacement
Procedure 3 in Section 5.
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