Park brake not activated – Engage
Air pressure too low – Allow to build up
Truck not in neutral – Select Neutral
Leaking air hose or fitting – Repair/Replace
Electrical fault – Check (Refer Section 12 of Manual)
Truck not in gear – Select correct gear
Ancillary mode drive gear not selected – Engage
Incorrect procedure for engagement – Refer Section 5 of Manual
Emergency stop button engaged Reset