Weak current College】 【refrigeration compressor maintenance knowledge and troubleshooting.

<br> 1. symptoms: unit exhaust temperature is high (more than 100 ℃) · unit coolant fluid level is too low (should be able to see oil Speculum, but not more than 50%) · dirty oil cooler; · oil filter .core plug; · temperature control valve failure (element bad); · broken oil solenoid valve without electricity or coil damage; · broken oil solenoid valve diaphragm rupture or ageing; · fan motor failure; · cooling fan; · exhaust pipe is not smooth or .exhaust air resistance (back pressure); · environment temperature exceeds the range (38 ° c/46 ° c); · temperature sensor failure (control unit); · pressure gauge whether failure (relay control unit). <br> 2, the .symptom: units fuel consumption or compressed air oil content in large volume too much · coolants, correct location should be in the observation unit load time, the oil level should not be more than half; · to jam; · back to the tubing installation ( .and oil separation distance at the bottom of the core) does not comply with the requirements; · unit running exhaust pressure is too low; · oil separation core isolation tank rupture; ·; internal divisions · unit with oil leakage; · coolant deterioration or extended .use. <br> 3. failure phenomenon: unit pressure low consumption greater than · real generator output volume; · placed valve failure (load time cannot be closed); · the intake valve fault; the fault; · cylinder · load solenoid valve ( .1SV) failure · minimum pressure valve stuck; · user network leaks; · pressure setting is too low; · pressure sensor failure (control unit); · pressure gauge failure (relay control unit); · pressure switch failure (relay control unit); .· pressure sensor or pressure gauge input hose leaks; <br> 4. symptoms: excessive exhaust pressure unit · intake valve fault; the fault; · cylinder · 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). <br> 5, the symptom: CUR · voltage is too low; · Terminal · loose; more than the .rated pressure unit pressure; · oil separation core plug; · contact · host failures; failure; · main motor failure; <br> 6. failure phenomenon: unit cannot start · fuse · bad; temperature switch; release; · Terminal · main motor .thermal relay; · fan motor thermal relay; · transformers; · no power input (control unit); · the fault does not eliminate (control unit); · controller failure. <br> 7, the symptom: unit startup current or trip · .user air switch; · the input voltage is too low; · star-Delta switching interval time is too short (10-12 seconds); · hydraulic cylinder failed (no reduction); · the intake valve failure (opening is too large or stuck .); · wiring loose; · host failure; · main motor failure; · 1TR time relay bad (relay control unit). <br> 8, failure phenomenon: the fan motor overload · fan · fan motor deformation; failure; · fan motor .thermal relay failure (aging); · wiring loose; · cooler plug; · exhaust air resistance. <br> 1. symptoms: dryer not run · compressor line disconnect · fuse · thermal relay · high voltage switching action · compressor stalling · line virtual .receive or loose <br> 2. failure phenomenon: dryer starting after a short period of time shall cease · ambient temperature too high · condenser plug · compressor overload · missing refrigerant · low voltage too low · intake too much dead · compressor card <br .> 3. failure phenomenon: the compressor does not start · wiring incorrect · voltage too low · start capacitor damage · relay or contactor is not closed-circuit · start · phase winding <br> 4. symptoms: compressor for overload protection actions and repeatedly .start and stop · low voltage or unbalanced · overload protectors with other electrical equipment · overload protector failure · running capacitor too small · exhaust pressure too high · winding short-circuit · thermal relay contact unstuck <br> 5. failure phenomenon: relay burn · .voltage too high or too low · run capacitor incorrect · repeatedly start and stop (reference 2 and 3) · relay specification · installation, incorrect <br> 6. failure phenomenon: capacitor burn · specifications do not match · voltage too high <br> .7. failure phenomenon: exhaust pressure too high too much refrigerant quantity · · refrigeration system with air condenser dirty · environment · the temperature is too high · fan pressure switch failure · fan motor failure · fan rotation direction is not correct · cooling water control valve .fault <br> 8. failure phenomenon: the exhaust pressure is too low and too little refrigerant quantity · · fan pressure switch failures and maintenance guide for screw maintenance guide. Daily maintenance of the content. Monthly maintenance of content. Quarterly maintenance content. Annual .maintenance of the content. <br> Considerations for daily maintenance: <br> 1. check the air filter and coolant level; <br> 2. check that all fittings and hoses for leaks; <br> 3. check records, if consumables .parts to replace the cycle must be down to be replaced; <br> 4. check records, when host exhaust temperatures at or near 98 ° C, you must clean the oil cooler; <br> 5. check records, if separator pressure reached .0.6BAR above (limit 1BAR) or pressure began to decline should stop replacement separation; 6. check the condensation water emissions, if the discharge is too small or no condensed water discharges, must stop cleaning water separator; <br> Monthly maintenance: < .br> 1. check oil cooler surface to be cleaned, if necessary; <br> 2. after cleaning cooler; <br> 3. clean water separator; <br> 4. check all wires connection and fastening; <br> 5. .check the AC contactors; <br> 6. clean motor sucking air surface and the dust on the surface of the shell; <br> 7. clean the oil filter; <br> Quarterly maintenance: <br> 1. main motor charging grease .; <br> 2. clean the main motor and the fan motor; <br> 3. replace the coolant; <br> 4. replace the oil filter; <br> 5. clean oil cooler; <br> 6. check minimum .pressure valve; <br> 7. check the sensor. <br> Annual maintenance: <br> 1. replace the coolant (UltraCoolant); 2. check valves; 3. check the cooling fan; 4. check hydraulic cylinders or stepping motors .and stepper limiters; 5. relief valve calibration (labour force survey in the specified units). <br>.