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Common faults of Ingersoll Rand micro-oil screw air compressor

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Update time : 2021-05-17 16:11:40
As a first-line air compressor brand product, Ingersoll Rand air compressor is a very stable and durable air compressor equipment under the condition of proper maintenance. However, if such a product has not been properly maintained under long-term operation for years and months, it will still inevitably cause various minor faults. This time, I will list some Ingersoll Rand micro-oil screw air compressors. Common faults.


1. Trouble phenomenon: the exhaust temperature of the unit is high (over 100C)

The coolant level of the unit is too low (should be visible from the oil sight glass, but not more than half);

The oil cooler is dirty;

The oil filter core is clogged;

The temperature control valve is faulty (the component is broken);

The oil cut-off solenoid valve is not energized or the coil is damaged;

The diaphragm of the oil cut-off solenoid valve is ruptured or aging;


2. Failure phenomenon: fan motor failure;

The cooling fan is damaged;

The exhaust duct is not unblocked or the exhaust resistance (back pressure) is large:

The ambient temperature exceeds the specified range (38℃ or 46℃);

Temperature sensor failure (Intellisys control unit)

Whether the pressure gauge is faulty (relay controls the unit).


3. Trouble phenomenon: large oil consumption of the unit or large oil content of compressed air

If the amount of coolant is too much, the correct position should be observed when the unit is loaded. At this time, the oil level should not be higher than half;

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;

The oil separation core is broken;

The internal partition of the separation cylinder is damaged;

The unit has oil leakage;


4. Failure phenomenon: low pressure of the unit

The actual air consumption is greater than the output of the unit; the air release valve is faulty (cannot be closed when loading); the intake valve is faulty;

Hydraulic cylinder failure; load solenoid valve (1SV) failure

There is leakage in the user pipe network;

The pressure setting is too low;

Pressure sensor failure (ntellisys control unit);

Pressure gauge failure (relay control unit);

Pressure switch failure (relay control unit);

Pressure sensor or pressure gauge input hose leaks;

Ingersoll Rand 3

5. Failure phenomenon: Exhaust pressure of the unit is too high

Inlet valve failure;

Hydraulic cylinder failure;

Load solenoid valve (1SV) failure;

The pressure setting is too high;

Pressure sensor failure (Intellisys control unit);

Pressure gauge failure (relay control unit);

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The voltage is too low:

Loose wiring;

The unit pressure exceeds the rated pressure;

The oil separation core is blocked;

Contactor failure;

Host failure;

Main motor failure;


6. Failure phenomenon: the unit cannot be started

The fuse is broken;

The temperature switch is broken;

The wiring is loose;

: The thermal relay of the main motor operates;

Fan motor thermal relay action;

Transformer is broken:

Intellisys has no power input (ntellisys control unit);

The fault is not eliminated (Intellisys control unit);

The Intellisys controller is faulty.


7. Fault phenomenon: The current is large or trips when the unit starts

User air switch problem;

The input voltage is too low;

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

Hydraulic cylinder failure (not reset);

Inlet valve failure (opening too much or stuck);

Loose wiring;

Host failure;

The main motor is faulty;

The 1TR time relay is broken (the relay controls the unit).


8. Fault phenomenon: fan motor overload

Deformation of the fan;

Fan motor failure;

Fan motor thermal relay failure (aging)

Loose wiring:

The cooler is clogged,

Large exhaust resistance.