Common troubleshooting methods for twin screw compressors
Common troubleshooting of twin screw compressor
1. Trouble phenomenon The exhaust temperature of the unit is high (over 100 degrees)
The coolant level of the unit is too low (should be visible in the oil glass but not more than half)
Dirty oil cooler
Oil filter element is clogged
Temperature control valve failure (bad component)
The oil cut-off solenoid valve is not energized or the coil is damaged
Broken or aging diaphragm of oil cut solenoid valve
Fan motor failure
Broken cooling fan
The exhaust duct is not smooth or the exhaust resistance (back pressure) is large
The ambient temperature exceeds the specified range (38 degrees or 46 degrees)
Temperature sensor failure (Intellisys control unit)
Whether the pressure gauge is faulty (relay control unit)
2 Trouble phenomenon The oil consumption of the unit is large or the compressed air contains large oil
The amount of coolant is too much, the correct position should be observed when the unit is loaded, and the oil level should not be higher than half at this time;
The return pipe is blocked;
The installation of the oil return pipe (the distance from the bottom of the oil separation core)
does not meet the requirements
Exhaust pressure is too low when the unit is running
Oil separation core rupture
The internal partition of the separation cylinder is damaged;
The unit has oil leakage;
The coolant has deteriorated or has been used for an extended period of time.
3. Failure phenomenon: low unit pressure
The actual air consumption is large and the output air volume of the unit;
Bleed valve failure (cannot be closed when loading);
Inlet valve failure
Hydraulic cylinder failure
Load solenoid valve failure (1SV failure)
Minimum pressure valve stuck
There is a leak in the user pipeline;
The pressure setting is too low;
Pressure sensor failure (Intellisys control unit);
Pressure gauge failure (relay control unit)
Pressure switch failure (same as above)
Pressure sensor or pressure gauge input hose leaks
4. Failure phenomenon: the exhaust pressure of the unit is too high
Intake valve failure;
Hydraulic cylinder failure
Load solenoid valve (1SV) failure
Pressure setting is too high
Pressure sensor failure (Intellisys control unit)
Pressure gauge failure (relay control unit)
Pressure switch failure (relay control unit)
5.Failure phenomenon: the unit current is large
6.Voltage is too low
Loose wiring
Unit pressure exceeds rated pressure
Exhaust pressure is too low when the unit is running
Oil separation core blocked
Contactor failure
Main motor failure Main motor failure
6. The unit cannot be started
Broken fuse
The temperature switch is broken;
Loose wiring
Main motor thermal relay action
Fan motor thermal relay action
The transformer is broken;
Intellisys no power input (Intellisys control unit)
The fault is not eliminated (Intellisys control unit)
Intellisys controller failure
7. Trouble phenomenon: The current is large or tripping when the unit starts
User air switch problem
Input voltage is too low
The star-delta conversion interval is too short (should be 10~12 seconds)
Hydraulic cylinder failure (not reset);
Intake valve failure (opening too much or stuck)
Loose wiring
Main engine failure; main motor failure
1TR time relay is broken (relay control unit).
8 Fault phenomenon: fan motor overload
Fan deformation
Fan motor failure
Fan motor thermal relay failure (aging)
Loose wiring
Blocked cooler
Large exhaust resistance.
Common troubleshooting methods for twin screw compressors
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