B - 5 Against Action for AML’S System Error

Notice

• Never operate the crane when the AML override key switch is turned to "ON". Use this switch only to stow the crane in an emergency.

• Vehicle responsible personnel or construction responsible personnel should keep the key for the AML override key switch.

If the cases listed below occur, an error occurs in the AML system.

• Even after performing a recovery operation corresponding to the error code, the error code remains.

• An error code other than given in the error code list is shown.

• The crane stops and you cannot operate it.

In this case, stow the crane by the following procedure.

1. When a load is suspended, unwind the winch to lower the load to the ground.

2. Insert the key into the AML override key switch, and turn it to "ON".

3. Stow the crane.

4. Return the AML override key switch to "OFF", and remove the key.

When your hand is released from the key, the switch returns to the "OFF" automatically.

B - 6 Do Output Control

6.1 Cause for AML automatic stop output

The AML automatic stop output is an output to drive the solenoid of unload valve for main pumps circuit. ON is output during crane operation, and OFF is output while the operation is being stopped. Once the operation is stopped, in order to prevent the repetition of detection signal (stop <=> operation), the unload status is maintained for 2 seconds even after the stop condition is resolved.

However, during this period of 2 seconds, when an operation is performed only to return to the safe side, the on-load output is performed immediately to allow the return operation to be performed.

In the stop status, a intermitted warning is given using the AML built-in buzzer. At the same time, an error code is displayed on the graphic display.

The causes for stop are as follows:

1 100% lifting performance stop

2 Anti-two-block stop

3

W0023 “Stopped at 100% of crane performance” or W0124 “Stopped at limit range of boom with jib”

(For the main boom with jib)

“Stop due to overwinding (two-blocking)”