The correct position should be observed when the unit is loaded. At this time, the oil level should not be higher than half; the oil return pipe is blocked; the device of the oil return pipe (the distance from the bottom of the oil separation core) does not meet the requirements; the exhaust pressure is too low when the unit is running; The oil separation core is broken; the internal partition of the separation cylinder is damaged; the unit has oil leakage; the coolant is degenerated or used for an extended period of time. 1 Trouble phenomenon: The exhaust temperature of the unit is high (over 100 ℃) The coolant level of the unit is too low (should be seen from the oil sight glass but not more than half) The oil cooler is dirty; the oil filter core is blocked; the temperature control valve Failure (bad component) oil cut-off solenoid valve is not energized or coil is damaged; oil cut-off solenoid valve diaphragm is broken or aging; fan motor is faulty; cooling fan is damaged; exhaust pipe is not dredged or exhaust resistance (back pressure) is large; environment The temperature exceeds the specified range (38℃ or 46℃). Whether the temperature sensor is faulty (control unit) and the pressure gauge is faulty (relay control unit). 2 Failure phenomenon: the unit has high fuel consumption or the compressed air contains large oil and the amount of coolant is too much. 3 Failure phenomenon: The unit pressure is low, the actual air consumption is greater than the output air volume of the unit; the bleed valve failure (cannot be closed when loading), the inlet valve failure; the hydraulic cylinder failure; the load solenoid valve (1SV failure·minimum pressure valve stuck; user pipe network) Leakage; pressure setting 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 leakage; 4 failure phenomenon: unit exhaust pressure Too high intake valve failure; hydraulic cylinder failure; load solenoid valve (1SV failure; pressure setting too high; pressure sensor failure (Intellisi control unit) pressure gauge failure (relay control unit) pressure switch failure (relay control unit) 5 failure phenomena : The current of the unit is too large and the voltage is too low; the wiring is loose; the pressure of the unit exceeds the rated pressure; the oil separation core is blocked; the contactor is faulty; the host is faulty; the main motor is faulty; On; the thermal relay of the main motor operates; the thermal relay of the fan motor operates; the transformer is broken;

No power input (control unit) failure is not eliminated (control unit) controller failure. 7 Fault phenomenon: The current is too large or the user air switch is tripped when the unit starts; the input voltage is too low; the star-delta conversion interval is too short (should be 10 ~ 12 seconds) hydraulic cylinder failure (not reset) intake valve failure (open Too much or stuck) loose wiring; host failure; main motor failure; 1P time relay is broken (relay control unit) 8 failure phenomenon: fan motor overload, fan deformation; fan motor failure; fan motor thermal relay failure (aging) loose wiring ; The cooler is blocked; the exhaust resistance is large. 1. Trouble phenomenon: the dryer does not run, the compressor circuit is disconnected, the safety wire is burned out, the thermal relay is activated, the high pressure switch is activated, the compressor is blocked, the circuit is virtual or loose 2. Trouble phenomenon: a short time after the dryer is started That is, stop the ambient temperature is too high, the condenser is blocked, the compressor is overloaded, the refrigerant is lacking, the low pressure is too low, the air intake is too large, the compressor is stuck 3. Trouble phenomenon: the compressor does not start, the wiring is incorrect, the voltage is too low, The starting capacitor is damaged, the relay or contactor is not closed, the starting winding is open, and the phase is missing 4. Fault phenomenon: the compressor is repeatedly started and stopped due to overload maintenance actions, low voltage or three-phase imbalance, and other electrical equipment connected to the overload maintenance device. Overload maintenance device failure, running capacitor is too small, exhaust pressure is too high, short circuit between windings, thermal relay contacts sticking 5. Trouble phenomenon: the relay burns out the voltage is too high or too low, the running capacitor is not correct, repeated start and stop ( Refer to 2 and 3, the relay specifications do not match, the device seat is incorrect 6. Trouble phenomenon: the capacitor burns out, the specifications do not match, the voltage is too high 7. Trouble phenomenon: the exhaust pressure is too high, the amount of refrigerant is too much, there is air and condenser in the refrigeration system Dirty·Environment temperature is too high·Fan pressure switch malfunction·Fan motor malfunction·Fan rotation direction is incorrect·Cooling water flow control valve malfunction 8. Trouble phenomenon: Exhaust pressure is too low, too little refrigerant amount·Fan pressure switch malfunction 3. Maintenance guide Screw machine maintenance guide. Daily maintenance content. Monthly maintenance content. Quarterly maintenance content. Annual maintenance content. Matters needing attention Daily maintenance content: 1. Check the air filter and coolant level; 2. Check the softness Whether the pipe and all pipe joints are leaking; 3. Check the records, if the consumable parts have reached the replacement period, stop and replace them; 4. Check the records, when the exhaust temperature of the main engine reaches or approaches 98°C, the oil cooler must be cleaned; 5. Check the records, if it is found that the separator pressure difference is above 0.6BA R (the limit is 1BA R or the pressure difference starts to decrease, the separation core should be shut down and replaced; 6. Check the condensate discharge, if it is found that the drainage is too small or there is no condensation For water discharge, it is necessary to shut down and clean the water separator; monthly maintenance content: 1. Check the surface of the oil cooler, and clean it if necessary; 2. Clean the cooler after cleaning; 3. Clean the water separator; 4. Check the connection of all wires and Be fastened; 5. Check the contacts of the AC contactor; 6. Clean the dust on the surface of the motor suction port and the surface of the shell; 7. Clean the oil return filter; quarterly maintenance content: 1. Main motor is filled with grease; 2 . Clean the main motor and fan motor; 3. Replace the coolant; 4. Replace the oil filter element; 5. Clean the oil cooler; 6. Check the minimum pressure valve; 7. Check the sensor. Annual maintenance content: 1. Replace the coolant ( Ultra Cool; 2. Check the check valve; 3. Check the cooling fan; 4. Check the hydraulic cylinder or stepper motor and step limit device; 5. Safety valve calibration (send to the labor bureau designated unit for mandatory inspection)