Detection and repair of common faults in freeze-drying equipment
Detection and maintenance of common faults in freeze-drying equipment 1. Dryer does not run, compressor line is disconnected, fuse is blown, thermal relay operates, high-voltage switch action, compressor stall line is virtually connected or loose.
2. The dryer stops after a short time, the ambient temperature is too high, the condenser is blocked, the compressor is overloaded with refrigerant, and the low pressure is too low. The intake air is too large and the compressor is stuck.
3, the compressor does not start, the wiring is not correct, the voltage is too low, the starting capacitor is damaged, the relay or the contactor is not closed, and the open winding is out of phase.
4. The compressor repeatedly starts and stops the low voltage due to the overload protection action or the three-phase unbalanced overload protector is connected with other electrical equipment. The overload protector malfunctions. The running capacitor is too small, and the exhaust pressure is too high. cement.
5. If the relay burnout voltage is too high or too low, the running capacitor will not start and stop repeatedly. The relay specifications are not correct.
6. The capacitor burnout specification does not match the voltage too high.
7. Excessive exhaust pressure, excessive refrigerant pressure, air in the refrigeration system, dirty condenser, high ambient temperature, faulty fan pressure switch, fan motor failure, incorrect fan rotation direction, cooling water flow control valve failure .
8. The exhaust pressure is too low, the low refrigerant dose is too small, and the fan pressure switch is faulty.
2. The dryer stops after a short time, the ambient temperature is too high, the condenser is blocked, the compressor is overloaded with refrigerant, and the low pressure is too low. The intake air is too large and the compressor is stuck.
3, the compressor does not start, the wiring is not correct, the voltage is too low, the starting capacitor is damaged, the relay or the contactor is not closed, and the open winding is out of phase.
4. The compressor repeatedly starts and stops the low voltage due to the overload protection action or the three-phase unbalanced overload protector is connected with other electrical equipment. The overload protector malfunctions. The running capacitor is too small, and the exhaust pressure is too high. cement.
5. If the relay burnout voltage is too high or too low, the running capacitor will not start and stop repeatedly. The relay specifications are not correct.
6. The capacitor burnout specification does not match the voltage too high.
7. Excessive exhaust pressure, excessive refrigerant pressure, air in the refrigeration system, dirty condenser, high ambient temperature, faulty fan pressure switch, fan motor failure, incorrect fan rotation direction, cooling water flow control valve failure .
8. The exhaust pressure is too low, the low refrigerant dose is too small, and the fan pressure switch is faulty.
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