Answer: (1) Fault phenomenon. The cooling fan trips and stops.
(2) Cause analysis.
1) Fan motor failure;
2) Fan motor thermal relay failure (aging);
3) Loose wiring;
4) Cooler blockage; Large exhaust resistance.
(3) Elimination method.
1) Check the fan motor;
2) Replace the fan motor thermal relay;
3) Check the wiring;
4) Use compressed air or water to clean the cooler.
