The solution of the cooling water machine for laser cutting machine is not refrigeration

Cooling water machine for laser cutting machine not refrigeration: to observe the cold water machine control panel if there is a press overload showed above. 1. Display: press usually there are three kinds of information overload, high pressure overload, low voltage, overload and current overload. ①。 Through pressure controller reset button to cancel the compressor overload can determine for high pressure overload. There are several kinds of, the cause of the high pressure overload fan does not turn, electromagnetic valve card can't open, no bad ventilation cooling equipment, the condenser is dirty. Troubleshooting: cold water machine is placed in a better position of ventilation, heat dissipation, use 1 mpa atmospheric pressure blow the dust on the condenser heat sink, and then observe whether compressor high pressure after the work is less than 2 mpa, fan does not turn and the electromagnetic valve card belongs to the accessories, it is ok to change. ②。 Observe the pressure gauge, high pressure and low pressure is lower than 0. 2 mpa, can be judged to be low pressure overload. Like this situation, that is, equipment must leak fluoride fluoride system. Troubleshooting: the equipment check funnelled down, funnelled to find after bare, time, pressure oil, add fluoride, plus fluorine by the nameplate on the weight of the quantitative, professionals can according to the pressure and fluorine. ③。 Through thermal overload reset button to cancel the compressor overload, overload can be judged to be current. The cause of the problem: more than rated current, overload is the compressor current and overload protection. Normally only compressor lack and environment temperature is too high will cause a current overload. Troubleshooting: improve the working environment, check the compressor lacks, the cause of the first test for a normal compressor three-phase resistor ( About 5 Ω three-phase balance, resistance to normal) , is not normal compressor was broken, check on whether the press line contact undesirable phenomenon and the ac contactor whether there is a lack of phenomenon. 2. Don't show: don't show press overload will observe whether the compressor is working. Work: (1) to observe the working pressure, working in the compressor, high pressure and low pressure is close to balance, met or micro hot air blow a cold wind over fan, electromagnetic valve can be judged to be card or compressor is bad; Normal observation of high pressure, low pressure is low, can be judged to be expansion valve adjustment is too small, dirty, dirty plugging, the bad and the evaporator surface conversion efficiency is low. (2) does not work: check all electrical appliance in the control of compressor ac contactor, the output is normal, such as 7 HP equipment compressor ac contactor is a intermediate relay 1 normally open point output to delay, delay normally open to the compressor ac contactor, ac contactor output to press, any electrical output is not normal, to determine the electric parts broken. 3. Show after a few seconds, automatic reset. This failure is commonly expansion valve adjustment is too small or the expansion valve failure. Troubleshooting: expansion valve to adjust to big location ( Adjustment is down clockwise and counterclockwise is adjustable) , see also won't appear the fault, if the failure to cancel, and then looked at low operation pressure, look to whether normal, sometimes pressure slants big, pressure is big, small dispatch expansion valve; If adjust no reaction of the expansion valve, expansion valve to fail, it is ok to replace a.