Waterproof Cooling Fan Troubleshooting

1 "Waterproof Cooling Fan" bearing temperature is too high
2 Fan Zhen
3 impeller rub shell
4 "Waterproof Cooling Fan" can not start, switch trip
5 can be started, abnormal sound, switch tripping running for some time after servo
6 "Waterproof Cooling Fan" ultra-current, motor temperature is too high