jcb JS300 Service Manual page 635

Section C - Electrics
Fault Code System
Operation Overview
Critical Fault
The display is Red, the buzzer will sound, an Icon
representing area of machine affected and a fault code will
display to indicate faults that may result in serious damage
to the machine or make the machine dangerous to
operate. This is known as a 'Critical' fault. The operator
must stop the machine. Critical faults remain active until
the critical fault is no longer there, otherwise it cannot be
cancelled or acknowledged.
The active fault screen is shown at A. After 2 seconds
screen B is displayed. Screens A and B will display
alternately every 2 seconds. Press the control wheel to
display the fault code log screen C.
C128820.jpg
Fig 2. Critical fault warning displays
C-210 9813/5100-1 C-210