1. Insufficient coolant
add coolant

2. The heat sink of the radiator is blocked
Find the cause of the blockage, clean the radiator

3. The radiator is not well ventilated
Increase the effective area of ventilation according to the installation requirements to ensure smooth ventilation

4. The coolant fan is not working properly
Check fan belt tension, replace belt if necessary

5. The fan is damaged
Repair or replace

6. The water pump is damaged
Repair or replace

7. Thermostat failure
replace

8. Fuel injection pump failure
Ask authorized personnel to repair or replace

9. Fuel supply timing is incorrect
Check the fuel injection pump data and ask authorized personnel to check and adjust

10. The ambient (intake) temperature is too high
Keep the computer room ventilated and reduce the temperature of the computer room reasonably

11. The unit is seriously overloaded
Control the load and prohibit the unit from overloading for a long time

12. Coolant alarm switch (sensor) or instrument failure
Check the control panel, instruments, and body sensors, repair or replace them, and troubleshoot.

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