Micro-oil screw compressor Common Troubleshooting Guide

Micro-oil screw compressor Common Troubleshooting Guide

     1 , failure phenomenon: the unit high exhaust temperature (over 100 ° C)

· Unit coolant level is too low ( should be from the oil sight glass that can be seen , but not more than half ) ;

· Oil cooler dirty ;

· Oil filter core blockage ;

· Thermostatic valve failure ( bad elements ) ;

· Off the oil solenoid valve without electricity or coil damage ;

· Off the oil solenoid valve diaphragm rupture or aging ;

· Fan motor failure ;

· Cooling fan is damaged ;

· Exhaust pipe is not blocked or exhaust resistance ( back pressure ) large ;

· Ambient temperature exceeds the specified range (38 ° C or 46 ° C);

· Temperature sensor fault (Intellisys control unit ) ;

· Pressure gauge is faulty ( relay control unit ) .

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2 , fault phenomenon: large or compressed air oil fuel unit volume

· Cooling dose too much, the correct location should be observed when the unit load , then the oil level should be no more than half ;

· Return pipe blockage ;

· Return pipe installation ( with the distance from the bottom of the oil separator element ) does not meet the requirements ;

· Unit is running the exhaust pressure is too low ;

· Oil separation core rupture ;

· Separation cylinder internal partitions damaged ;

· Unit oil leaks ;

· Coolant deterioration or extended use .

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3 , fault phenomenon: low pressure unit

· Set output volume is greater than the actual gas consumption ;

· Bleeder valve failure ( can not turn off when loaded ) ;

· Intake valve failure ;

· Hydraulic cylinder failure ;

· Load solenoid valve (1SV) failure

· Minimum pressure valve stuck ;

· User pipeline leaks ;

· Pressure set too low ;

· Pressure sensor fault (Intellisys control unit ) ;

· Pressure gauge fault ( relay control unit ) ;

· Pressure switch failure ( relay control unit ) ;

· Pressure sensor or pressure gauge input hose leak ;

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4 , fault phenomenon: high discharge pressure unit

· Intake valve failure ;

· Hydraulic cylinder failure ;

· Load solenoid valve (1SV) fault ;

· Pressure setting is too high ;

· Pressure sensor fault (Intellisys control unit ) ;

· Pressure gauge fault ( relay control unit ) ;

· Pressure switch failure ( relay control unit ) .

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5 , fault phenomenon: large current unit

· Voltage is too low ;

· Loose wiring ;

· Unit pressure exceeds the rated pressure ;

· Oil separation core plug ;

· Contactor failure ;

· Host failure ;

· Main motor failure ;

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6 Symptom : The unit does not start

· Fuse bad ;

· Temperature switch is broken ;

· Wiring release ;

· Main motor thermal relay ;

· Fan motor thermal relay ;

· Transformers bad ;

· Intellisys no power input (Intellisys control unit ) ;

· If the fault persists (Intellisys control unit ) ;

· Intellisys controller failure .

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7 , fault phenomenon: the unit starts when the current large or trip

· User air switch problem ;

· Input voltage is too low ;

* Star - delta conversion interval is too short ( should be 10 ~ 12 seconds ) ;

· Hydraulic cylinder failure ( no reset ) ;

· Intake valve failure ( opening is too large or stuck ) ;

· Loose wiring ;

· Host failure ;

· Main motor failure ;

· 1TR bad time relay ( relay control unit ) .

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8 , failure phenomenon : Fan motor overload

· Fan deformation ;

· Fan motor failure ;

· Fan motor thermal relay fault ( aging ) ;

· Loose wiring ;

· Cooler clogged ;

· Exhaust resistance is large .