Once the compressor fails, the principle and structure of the compressor have a more familiar understanding, then the cause of the failure analysis and exclusion is not difficult. The analysis of the fault should start from the easy and convenient place. The following describes several common fault analysis and processing methods.

1 Compressor not loaded

1) The pressure on the pipeline exceeds the rated load pressure, and the pressure regulator is disconnected. No measures are necessary, the compressor will automatically load when the pressure on the gas line is lower than the loading (position) pressure of the pressure regulator; and;

2) If the solenoid valve fails, remove it for inspection and replace it if necessary;

3) If there is leakage in the control pipeline between the oil and gas separator and the unloading valve, check the pipeline and connection. If there is leakage, repair it.

2 Exhaust pressure too low

1) Check whether the two-position manual valve and pressure gauge "before separation" and "after separation" are leaking. If they are leaking, troubleshoot the leakage or replace the manual valve;

2) Check whether the adjusting solenoid valve is leaking. If it is leaking, troubleshoot and replace the adjusting solenoid valve if necessary; and;

3) The air consumption exceeds the exhaust air consumption. Check whether there is any leakage in the pipeline. If there is any leakage, remove the leakage point or reduce the air consumption;

4) Inspect whether the air filter element is clogged, and clean or replace it if necessary;

5) Check whether the safety valve leaks. If it leaks, remove it and replace it if necessary;

6) Check whether the butterfly valves are all open and whether the air intake regulator is working normally. If there is any problem, replace or readjust the pressure switch; check whether the upper and lower limits of the pressure switch are normal, and adjust if necessary;

7) If the compressor fails, contact the manufacturer and check the compressor after consultation.

3 Exhaust pressure too high

1) Check whether the butterfly valve mechanism has mechanical failure, if any, it should be eliminated;

2) Is the loading solenoid valve leaking? If so, troubleshoot and replace the solenoid valve if necessary;

3) Check and adjust the upper and lower limits of the pressure switch, and replace the pressure switch if necessary.

4 Exhaust temperature too high

1) Check whether the exhaust pressure exceeds the regulations. If so, adjust it to the specified exhaust pressure;

2)-Check whether the lubricating oil is clean and whether the oil level is normal, and make up or replace the lubricating oil if necessary;

3) I. Check if the fan motor speed is normal and the exhaust port is blocked;

4) Inspect whether the appearance of the oil cooler and after-cooler is clean, and clean the outer surface of the cooler if necessary;

5) Check whether the air intake and exhaust of the environmental unit are affected. If so, the influence of external factors should be eliminated to ensure the normal ventilation of the unit;

6) Check whether the temperature control valve is damaged; check whether the solenoid coil and solenoid valve diaphragm are damaged, and repair or replace if necessary; and;

7) Check whether the filter element of the oil and gas separator is blocked or has excessive resistance. If so, replace the filter element of the oil filter.

5 Compressor fuel consumption is large

1). Whether the oil content of the condensate discharged from the steam trap is large. If so, check the leakage point in the unit and eliminate it;

2) Check whether the oil level in the compressor is too high. If it is high, lower the oil level;

3) Check whether the opening pressure of the pressure valve is normal, and check and replace the valve if necessary;

4) Check whether the return pipe is blocked, and clean or replace the return pipe if necessary;

5) Check whether the filter element of the oil and gas separator is invalid, and replace the filter element of the oil separator if necessary.

6 No air supply for compressor

1) Inspect the control cylinder for movement and check the butterfly valve for mechanical failure;

2) and see if the loading electromagnetic coil has an attractive force; and;

3) Check the sub-circuits where the solenoid valves are located one by one.

7 Automatic shutdown of compressor

1) Check whether the automatic air switch takes off and whether the voltage is normal;

2) The intake butterfly valve is normally closed and should be checked and readjusted or replaced;

3) Check whether the three phases of contactor and motor are normal in Y-△ startup.

8 Compressor cannot be started

1) to check whether there is a control voltage, if not, to check whether the fuse is in good condition; and;

2) Check whether the control relay and time relay are operating normally.

9 Difficulty in starting after shutdown

1) The lubricating oil used is of the wrong grade. Clean and change the oil thoroughly;

2) The oil is sticky and coking, and the oil should be changed thoroughly after cleaning;

3) Severe air leakage of shaft seal, remove and replace it;

4) Change the original position of the unloading valve flap and readjust the position.