hitachi — Outline

TROUBLESHOOTING/ Monitor Unit Overload Alarm (Only machines equipped with optional parts) Alarm IMPORTANT: When using overload alarm, make overload alarm available by using Dr. ZX. The system measures load of the suspended load from bottom pressure of the boom cylinder. An alarm message is displayed and a buzzer is rung, if over- load is detected. 1. If load of the suspended load becomes over- loaded, the boom bottom pressure sensor (op- tional) sends a signal to MC. 2. If the overload alarm ON/OFF switch (optional) is turned ON, the monitor unit displays an alarm message and rings a buzzer according to the signal from MC by using CAN.

T1V1-05-01-128 Primary Screen Overload Alarm ON/OFF Switch (Op- tional) 3. If overload of the suspended load is dissolved, the alarm message disappears and the buzzer stops ringing. NOTE: Even if the work is done while displaying a screen except the primary screen, when an overload condition is reached, the screen of monitor unit is switched to the primary screen, an alarm message is displayed, and a buzzer is rung. Even after the overload alarm is dissolved, the monitor unit keeps on displaying the primary screen without returning to the screen while the work is done. T1V1-05-02-004 T5-2-18