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.