The exhaust temperature of the unit is high (over 100 ℃)
Possible reasons: The coolant level of the unit is too low (should be visible from the oil sight glass, but not more than half); The oil cooler is dirty; The oil filter element is blocked; The temperature control valve is faulty (element Bad); The fuel cut-off solenoid valve is not energized or the coil is damaged; The fuel cut-off solenoid valve diaphragm is broken or aging; The fan motor is faulty; The cooling fan is damaged; The exhaust duct is not smooth or the exhaust resistance (back pressure) Large; ·Ambient temperature exceeds the specified range (38°C or 46°C); ·Temperature sensor failure (control unit); ·Pressure gauge failure (relay control unit).
The oil consumption of the unit is high or the oil content of the compressed air is high
Possible reasons: Too much coolant, the correct position should be observed when the unit is loaded, at this time the oil level should not be higher than half; Oil return pipe is blocked; Oil return pipe installation (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;
Unit pressure low
Possible reasons: the actual air consumption is greater than the output air volume of the unit; the exhaust valve is faulty (it cannot be closed when loading); the intake valve is faulty; the hydraulic cylinder is faulty; the load solenoid valve (1SV) is faulty and the small pressure valve is stuck Dead; There is leakage in the user pipe network; The 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;
Exhaust pressure of unit is too high
Possible reasons: intake valve failure; hydraulic cylinder failure; load solenoid valve (1SV) failure; pressure setting too high; pressure sensor failure (Intellisys control unit); pressure gauge failure (relay control unit) ;·Pressure switch failure (relay control unit).
The unit current is high
Possible reasons: the voltage is too low; the wiring is loose; the unit pressure exceeds the rated pressure; the oil separator is blocked; the contactor is faulty; the main engine is faulty; the main motor is faulty;
The unit cannot be started
Possible reasons: the fuse is broken; the temperature switch is broken; the wiring is loose; the main motor thermal relay operates; the fan motor thermal relay operates; the transformer is broken; no power input (control unit); device failure.
High current or trip when the unit starts
Possible reasons: user air switch problem; input voltage is too low; star-delta conversion interval is too short (should be 10 ~ 12 seconds); hydraulic cylinder failure (no reset); intake valve failure (too open Large or stuck); Loose wiring; Main engine failure; Main motor failure; 1TR time relay broken (relay control unit).
The fan motor is overloaded and the fan is deformed
Fan motor failure; fan motor thermal relay failure (aging); loose wiring; blockage of cooler; large exhaust resistance.
Dryer not running
Possible reasons: The compressor line is disconnected, the fuse is blown, the thermal relay is activated, the high-voltage switch is activated, the compressor is blocked, the circuit is virtual or loose
The dryer stops shortly after starting
Possible reasons: the ambient temperature is too high, the condenser is blocked, the compressor is overloaded, there is no refrigerant, the low pressure is too low, the air intake is too large, the compressor is stuck
Compressor does not start
Possible reasons: incorrect wiring · low voltage · damaged starting capacitor · relay or contactor not closed · open circuit of the starting winding · phase loss
The compressor starts and stops repeatedly due to the overload protection action
Possible reasons: low voltage or unbalanced three phases, other electrical equipment connected to the overload protector, failure of the overload protector, too small running capacitor, too high exhaust pressure, short circuit between windings, thermal relay contact sticking
Relay burnt out
Possible reasons: the voltage is too high or too low, the running capacitor is incorrect, repeated start and stop (refer to 2 and 3), the relay specification does not match, the mounting seat is incorrect
Capacitor burned out
Possible reasons: specification mismatch · voltage is too high
Exhaust pressure too high
Possible reasons: too much refrigerant, air in the refrigeration system, dirty condenser, too high ambient temperature, faulty fan pressure switch, faulty fan motor, incorrect fan rotation direction, faulty cooling water flow regulating valve
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Exhaust pressure too low
Possible reasons: The amount of refrigerant is too low · The fan pressure switch is faulty.
CF1900-Cross-Fluted Film Fill
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