When the plastic impeller centrifugal fan is being tested, it is necessary to carefully read the product manual, and effectively check whether the wiring method is consistent with the wiring diagram. It should be carefully checked whether the working voltage supplied to the fan power supply meets the requirements, whether the power supply is out of phase or in phase. Whether the capacity of the distributor components meets the requirements.
When the plastic impeller centrifugal fan is in the test run, the number of the pilot fan can not be less than two people. One person controls the power supply. One person observes the operation of the fan and immediately detects the abnormal phenomenon. First check whether the rotation direction is correct. After the centrifugal fan starts running, it should be immediately Check whether the running current of each phase is balanced and the current exceeds the rated current; if there is abnormality, stop the inspection. After five minutes of operation, check whether the fan is abnormal or not, and confirm that there is no abnormal phenomenon and then start up.
When the plastic impeller centrifugal fan double-speed centrifugal fan is tested, the low speed should be started first to check whether the rotation direction is correct. When the high speed is started, it must be restarted after the fan is stationary to prevent the high speed reverse rotation, causing the switch to trip and the motor to be damaged.