Inside leaks → check the seal is damaged, the spring is not equipped with bad
Outside Leakage → Loose at the connection or the seal is bad → tighten the screw or replace the seal
Power on the noise → head on the loose parts loose, tighten. Voltage fluctuation is not within the allowable range, adjust the voltage. Iron suction surface impurities or uneven, timely cleaning or replacement.
Working frequency is too high or life has been → re-election products or update products