Fault Phenomenon: UpRight aerial work platform when starting, the main battery circuit breaker trips immediately, vehicle loses all power.

Troubleshooting Process:
– Checked main wiring: wiring short circuit.
– Checked motor: motor windings shorted.
– Checked circuit breaker: circuit breaker sensitivity too high.
– Checked insulation: insulation layer damaged.

Root Cause: Damage to the main circuit wiring insulation causes a short circuit to ground.

Required Parts: Main harness repair and circuit breaker reset.