Finding the causes of air compressor error - Part 2
Why does air compressor oil come from the upper air filter of the air compressor?, What causes the compressor to switch between load and unload? What make the compressor engine overloaded? ...
Why does air compressor oil come from the upper air filter of the air compressor?, What causes the compressor to switch between load and unload? What make the compressor engine overloaded? ...
| Hitachi air compressor repair
| Symptoms | Causes | Remedies | | Oil flows from upper air filter and coagulates | Unload or load in short time | -Repair intake valve
- Check the closing time of relay and other wires. | | Minimum pressure valve is leaked | Repair and replace if nescessary | | Air in contactor is insufficient | Check Kiểm tra van ngắt điện khí | | = Frequently switch between load and unload | The leaked pipeThe leaked pipe | Check the possibly leaked point | | pressure parameters are set too low | Reset parameters | | Unbalanced air consumption | Increase container capacity and add pressure valve if needed | | Unbalanced air consumption | Increase container capacity and add pressure valve if needed | | The overloaded engine
-Signal: The thermister is switched and the motor exceeds the norm
Consequences: fire engine, fire switch in electric cabinet. In many case,thermister has not yet affected but the engine has been burnt. | - Defective voltage and phase loss (with a machine without phase protection) - Failure of main motor . Motor bearings run out of grease, jammed gear, transmission part ... increasing load - Air end is stuck, mechanical breakage / clogging of mechanical structure, axis misalignment, oil seal. This is the most common cases -Slow oil filter and oil separator - High compressed air pressure leads to overload. . | You only need to measure the voltage at unload and load or the machine with the same current in the same workshop to check and fix.
-This error should remove the belt and check by hand whether the air end or engine is stuck before taking other measures.
- The oil separator is clogged or replaced if necessary
- Checking the presure control settings again. Another reason is that the pressure relief valve set the compressed air pressure higher than the designed pressure of the machine. | | Reverse phase | In the repairing process of electrical systems, it is possible to reverse the phase or when using backup generators in air compressors with anti-phase devices integrated in the control panel or using digital relays. | Reversing 2 of the 3 power supply phases for the air compressor | | Phase loss | Because of the electrical system, the breakdown of the wire.... | Checking the power system can clearly find out | |
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