Def/Scr System Alarm; Def/Adblue® Level Alarm - Hitachi ZW 120-6 Operator's Manual

DEF/SCR System Alarm

When the DEF/AdBlue® level becomes low and/or the
Urea SCR system malfunctions, the engine performance is
controlled depending on the status.
The operator is alerted with alarm indicators and buzzer.
Move and park the machine in a safe place and follow
troubleshooting guide for the accompanied alarms.
DEF/AdBlue® Level Alarm
Display of the DEF/AdBlue® gauge changes depending on
the DEF/AdBlue® level.
The engine speed and output level control is as follows.
Level Gauge Alarm Indicator
(Red, light)
(Red, slow blink)
(Red, slow blink)
(Red, fast blink)
(Red, fast blink)
IMPORTANT: When DEF/AdBlue® tank becomes empty,
the engine runs but machine operation is disabled
until DEF/AdBlue® is supplied.
OPERATOR'S STATION
Buzzer sounds once. (0.3 seconds)
Buzzer sounds once. (1.2 seconds)
Buzzer sounds once. (1.2 seconds)
(Red, light)
Buzzer sounds every 1.2 seconds.
(Red, blink)
Buzzer sounds every 0.3 seconds.
(Red, blink)
1-23
Buzzer
DEF/AdBlue® level is low.
Refill DEF/AdBlue®.
DEF/AdBlue® is insufficient.
Refill DEF/AdBlue®.
DEF/AdBlue® tank is empty.
Refill DEF/AdBlue®.
Engine output and speed are
restricted.
Status/Inducement