How to carry out no-load operation check on vertical deep water pump motor?

How to carry out no-load operation check on vertical deep well water pump motor?
Before the official installation of the motor should be carried out without load, if abnormal circumstances, should be adjusted and restored before the official installation.
  ① check the amount of oil, the correct amount of oil should be in the middle of the oil mark instructions. The amount of oil should be appropriate to add 10 mechanical oil, oil should be appropriate to put too much oil.
  ② check the wiring is completed, you can power for no-load operation. If you find that the motor does not turn to immediately stop and turn on any two of the power cord to start again; if the motor is still not started, check the power supply system for details, whether there is two-phase power supply or power is not connected.
  ③ motor start to the speed of stability, should stop the motor for mechanical inspection. The mechanical connection parts such as loosening, falling off or collision and other phenomena, should be adjusted and repair.
  ④ motor no-load operation should be sustained 2 ~ 3h, running in time to check whether the abnormal phenomenon or sound appears. The end of the operation after the timely inspection of the bearing whether the overheating. If there are abnormal circumstances, should be immediately adjusted and repaired.