34. ARSC (AUTOMATIC RETARD SPEED CONTROL) Remedy pattern 1 If the central warning lamp and the ARSC caution lamp flash and the buzzer sounds, it means that a serious problem has occurred in the ARSC system. Operation of the ARSC system is stopped. Operate the brake pedal or retarder lever as necessary to ensure safety. When the system switch is turned OFF, the central warning lamp and ARSC caution lamp go out and the buzzer stops. REMARK If the starting switch is turned ON when the air pressure in the air tank has dropped, failure code “9.2” may be displayed. If this happens, start the engine and raise the air pressure to the normal level, then start again.
If the failure code is “9.3” or “9.4”, it shows that there is a failure in the system switch, so even if the system switch is turned OFF, the central warning lamp and ARSC caution lamp will flash and the buzzer will sound. Remedy pattern 2 When only the ARSC caution lamp flashes The ARSC system continues to be actuated, but an abnormality has occurred in the system. Turn the system switch OFF to stop use of the ARSC. When the system switch is turned OFF, the ARSC caution lamp will go out. In the case of patterns 1 and 2 above, turn the system switch OFF quickly, stop use of the ARSC and contact your Komatsu distributor for repairs.
The set travel speed display is also equipped with a self- diagnostic function, and a failure code is displayed on the set travel speed display. 34.3.2 WHEN SYSTEM IS NORMAL A code is displayed on the controller LED under the assistant’s seat. REMARK If the above code is not displayed when the accelerator pedal is being depressed or not being depressed, it is necessary to adjust the accelerator link. If it is not properly adjusted, the ARSC system will not be able to judge correctly if the accelerator pedal is being depressed or not, so the ARSC may not work normally. 5-47 No.
Failure code Details Method of resetting 1 E1 Abnormality in CPU Turn the machine starting switch ON again or turn the system switch ON again. 2 E2 Abnormality in memory Turn the machine starting switch ON again or turn the system switch ON again. No. Code Conditions 1 0.0 When accelerator pedal is being depressed 2 0.0. When accelerator pedal is not being depressed