BYD BYD5030XXYBEV2, Manual

Page: 228 / 252

228 8-1 When Failure Occurs

Wait for the motor coolant temperature to drop to the normal range, and then check
the coolant level in the expansion tank again. Fill coolant again to the level between
MIN and MAX marks if necessary. If the coolant level is far below the MIN mark, there
is definitely a leak in the system. In this case, it is recommended to immediately
contact a BYD authorised service provider for inspection.
WARNING

Spraying out of vapour or coolant indicates a very high pressure. To avoid causing
personal injury, keep the front compartment hatch closed until no vapour sprays out.

Do not open the radiator cap when the temperature of motor and radiator is still high,
as the spraying of high-temperature vapour and liquid will cause serious personal
injury.
WARM TIP

When the motor is running, keep hands and clothes at a certain distance away from
rotating fans.
HV Components and Treatment in Case of Accident

The EV system applies direct current with the voltage higher than 300 V. The system
will produce a lot of heat before and after starting the vehicle and when the vehicle is
powered off. Pay attention to the effect of high voltage and high temperature.

Do not disassemble, move or change HV battery components and connection wires,
because the connector can cause serious burn or electric shock and may possibly
lead to personal injury or even death. Connection wires in orange color are HV wiring
harness. The user is not allowed to repair the vehicle's HV system. If any repair is
needed, it is recommended to drive your vehicle to a BYD authorised service provider.
Emergency Shutdown System

If the following conditions are met, the emergency shutdown system will be activated
and the HV system will shut down automatically:

Any airbag failing to open upon a frontal or lateral collision;

Some rear collisions;

Some EV system faults;