មូលហេតុនៃចរន្តធំនៅពេលបូមទឹកលិចទឹកកំពុងដំណើរការ។ Motor guide bearing wear, water pump rubber bearing wear, seal ring wear Thrust bearing wear, submersible pump impeller and lower cover wear អត្រាលំហូរនៃស្នប់ submersible ធំពេក ឬតូចពេក អ័ក្សបូម submersible be bent ហើយ bearing is not concentric