HITACHI Bebicon air compressor has fallen into disorder condition this morning! Giving up today's managements at first, main switch ON and OFF several trial could recover normal and usual performances, good luck!
Remembering the servicing records on this machinery, over 22 years nothing has been serviced on earth, though written "Maintenance Free".
The control of air pressure on this compressor is like this, main switch ON and power motor start to move belt connected pump, pressure sensor control magnetic relay to cut off the circuitry when the pressure comes to 7k/cm3, re-switch ON when comes down to 5k/cm3 till 7k/cm3, these actions are repeated continuously.
The affair this morning was unusual disfunction of cut off relay, the power motor continued running over 7k/cm3, because cut off mechanism could not work well leading to the action of safety relief valve opening with jet like noise.
Then what would happen this safety valve did not open by some lusting or sludge? Big-bahn like bomb would occurred resulting miserable landscape involving neighbors, supposing awful disasters.
Precise and careful checking and servicing on machineries for business use are necessary to continue good business.
Today's affair gave me a best lesson on earth.
Judging from the apperance of the pressure controller case, the construction inside is mechanical relays with coil spring and valve, manufactured not by HITACHI but by some specialized manufacturer. Direct contact to the company in very near future would be available to obtain the repair part, pressure control valve, identification of the parts number and the manufacture's name would be the enough informations to seek on WEB site.
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