Check whether the oil content of condensate discharged from the drain valve is too large, whether the oil level of the compressor is high, whether the opening pressure of the small pressure valve is normal, whether the oil return pipe is blocked, whether the oil separation core is blocked, etc. The above problems will affect fuel consumption and should be handled in time.
2. The air compressor stops automatically during operation
First, check whether the machine stops normally and automatically; Then check whether the automatic switch and thermal relay act, whether it causes the cooling fan motor to stop, or the exhaust temperature is too high, or the pressure is too high, and whether the motor voltage is normal.
3. The exhaust pressure of the air compressor is too low
First, check whether the pressure before and after separation, manual valve and regulating solenoid valve 2sv leak; Then check whether the gas pipeline leaks, whether all butterfly valves are opened, whether the air inlet regulator works normally, whether the solenoid valves 3sv and 8sv leak, whether the pressure switch IPS needs to be readjusted, etc.
After starting up for a few seconds, it will stop automatically from the electrical aspects, such as whether the automatic air switch jumps, whether the voltage is normal, whether the closing degree of the inlet butterfly valve is normal (the compressor cannot be started with load), and whether the three phases of the contactor and motor are normal during Y-delta startup.
5. The exhaust temperature of the air compressor is too high
The exhaust temperature is generally 80 ~ 95 ℃. If there is not enough lubricating oil for cooling, the temperature will be too high and cause failure. First, check whether the ambient temperature, compressor lubricating oil, oil level, oil quality and refrigeration fan are normal; Then check whether the oil cooler and aftercooler are clean, whether the temperature control valve element, oil cut-off solenoid valve voltage and valve body are normal. If the diaphragm is damaged and the temperature control valve core does not act, it needs to be replaced; Check whether the oil filter is dirty or needs to be replaced.
Check whether the control oil cylinder acts. If so, check whether the butterfly valve has mechanical failure; If there is no fault, check whether the loading electromagnetic ISV coil has suction; After eliminating the mechanical fault and coil fault of ISV solenoid valve, check the sub circuit of ISV solenoid valve one by one.
7. Shut down due to oil injection at the inlet of air compressor
First check whether the oil cut-off solenoid valve 5sv has voltage and whether the mechanical part is normal; If normal, check the check valve and reassemble or replace it.