【 Weak current College 】 refrigeration compressor troubleshooting

1. symptoms: unit exhaust temperature is high (greater than 100 ° c)
Possible causes: line coolant fluid level is too low (should be able to see oil Speculum, but not more than half); · 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); and the ambient temperature exceeds · scope (38 ° c or 46 ° c); · temperature sensor failure (control unit); · pressure gauge whether fault (relay control unit).
2, the symptom: unit consumption of large quantities of oil or compressed air
Possible causes: coolant volume too much, the correct location should be in the unit load-time observation, 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.
3. failure phenomenon: unit pressure low
Possible causes: the actual consumption is greater than the unit output volume; · operable fault (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;
4, the symptom: unit exhaust pressure too high
Possible causes: the 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).
5, the symptom: CUR
Possible causes: voltage is too low; · Terminal · loose; more than the rated pressure unit pressure; · oil separation core plug; · contact · host failures; failure; · main motor failure;
6, the symptom: unit cannot start
Possible causes: fuse; · 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.
7, the symptom: unit startup current or trip
Possible cause: the 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); · connection loose; · host failure; · main motor failure; · 1TR time relay bad (relay control unit).
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.
9. trouble phenomenon: drying machine is not running
Possible causes: compressor line disconnect · fuse · thermal relay · high voltage switching action · compressor stalling · line virtual receive or loose
10. failure phenomenon: dryer starting after a short period of time shall cease to
Possible causes: ambient temperature too high · condenser plug · compressor overload · missing refrigerant · low voltage too low · intake too much dead · compressor card
11. failure phenomenon: the compressor does not start
Possible causes: wiring incorrect · voltage too low · start capacitor damage · relay or contactor is not closed-circuit · start · phase winding
12. failure phenomenon: compressor for overload protection actions and repeatedly start and stop
Possible causes: low voltage or unbalanced · overloadprotectors with other electrical equipment · overload protector failure · running capacitor too small · exhaust pressure too high · winding short-circuit · thermal relay contact unstuck
13. the failure phenomenon: relay burned
Possible causes: voltage is too high or too low · run capacitor incorrect · repeatedly start and stop (reference 2 and 3) · relay specification · installation, incorrect
14. symptom: capacitor burned
Possible causes: specifications do not match · voltage too high
15. symptoms: excessive exhaust pressure
Possible amount due: $ excessive · refrigerant in the refrigeration system with air · condenser dirty · ambient temperature too high · fan pressure switch failure · fan motor failure · fan rotation direction is not correct · cooling water control valve fault
16. trouble phenomenon: exhaust pressure too low
Possible causes: refrigerant quantity too little · fan pressure switch failure.