The first point: keep the surface of the chiller filter clean, air around the filter, clean the filter regularly, and generally purge the filter once with compressed air for three weeks. Reduce the occurrence of mold "pour sweat" phenomenon. Before stopping the plastic machine, first turn off the cold water gate of the auxiliary mold, or turn off the cold water to increase the temperature of the water in the cavity, so that the mold will not produce rust. If the chiller has been used for more than half a year, or the high and low pressure engine often fails, or the cooling capacity is reduced, please arrange the technician to clean the radiator (if the chiller has a pressure gauge installed, the pressure of the high pressure gauge is higher than 300 PSI, if exceeded, The surface of the heat sink should be cleaned to keep it clean and improve the heat sink effect). If the fault persists after multiple cleanings as described above, please arrange for the staff to perform repairs. If the water is solidified for a period of time, the pump pump leaves may be solidified by the dirt. When the machine is turned on, the pump rotor must be loosened first to avoid the pump leaves not turning, resulting in burning the fuse. (Applicable to chillers below 5 liters) Cleaning of radiators for chillers First stop the machine, remove the filter from the front and lower panels of the machine, and blow off the dust on the surface of the filter with compressed air. If the radiator is dirty, it should also be cleaned together. If there are conditions, spray the air-conditioning cleaning agent on the surface of the heat-dissipating net. After a few minutes, rinse with water and repeat until the surface of the filter is clean.
The second point: common faults and troubleshooting methods of chillers, common faults and troubleshooting methods of chillers: turn on the power switch, the chiller power indicator does not light, 1. The fuse is not installed, and the appropriate fuse is installed. 2. The power indicator light is damaged and the electronic board is replaced. 3 power supply three-phase wiring error (note the auxiliary control line), check the wiring problem, turn on the power switch and the water pump switch to burn the fuse, the circuit short-circuit fault check control wire and the main power line pump rotor is stuck, use the screwdriver to loosen the motor rotor (for 5 or less chiller). Pump failure, 1. Pump motor coil is short, open circuit, repair motor coil or replace motor; 2. Pump overload protector automatically jumps, the current limit of protector is within the allowable range Increase the pressure and press the reset button halfway. Compressor failure, 1. Compressor coil is short, open circuit, replace the matching compressor; 2. Compressor overload protector automatically jumps, the current limit of the protector is within the allowable range Adjust it up appropriately and press the reset button. Compressor frosting, 1. Circulating water circulation or valve is not open, check the water valve, all pipelines, ensure smooth flow, install short-circuit pipeline. 2. The circulating water pipeline is too small, and the diameter of the circulating water pipe is increased to ensure the normal water circulation. According to the temperature of the table, the number is up and down. 1. The temperature control table is damaged, repair or replace the temperature control table. 2. The temperature line is in poor contact, repair or replace the temperature sensing line. 3. The temperature sensing line and the temperature measuring body are dirty. Wipe the temperature measuring body clean. Icing in the circulating water tank, 1. Set the temperature too low to correct the set value. 2. There is no circulating water in the water tank, and a circulating water circuit is shorted between the chilled water outlet and the inlet. 3. The temperature control table is out of control, and the temperature is replaced. The high voltage fault of the control table is poorly dissipated, the radiator is too dirty, the cleaning radiator can be bad, the ventilation condition is improved, the cooling fan does not work, the fan motor is burned, the short circuit is repaired or the motor is replaced by the high pressure engine, and the high pressure engine is replaced by the refrigerant. Insufficient or pipeline leakage, replenishing refrigerant or repairing after repairing the leak, vacuuming and replenishing the refrigerant to dissipate heat badly, the radiator is dirty, the radiator valve is not opened or the opening is too small, the radiator is cleaned, and the valve is fully opened.
The third point starts and stops: Start the status button on the keyboard, then switch the unit ON/OFF switch on the bottom of the keyboard to the ON position. The unit will perform a self-test. After a second, one compressor is started. After the load is increased, another compressor is started. Once the unit is started, all the units that have not been operated automatically start and stop according to the change of the cooling load (refrigerated water supply and return water temperature).
Normal operation: The unit will run normally. The controller will monitor the oil pressure, motor current and other parameters of the system. Once there is a problem, every 24 hours of operation, there should be a permanent record of the unit operating conditions at a fixed time interval. As long as the unit ON/OFF toggle switch under the keyboard is switched to the off position, the unit can be stopped. To prevent damage, do not cut off the unit's power supply even when the unit is shut down. Fan, pump operation cooling tower The fan, cooling water pump and cold water pump are all independently controlled. Before starting the machine, confirm that the power supply is normal, no reverse phase, no phase loss. Before the pump is turned on, make sure that the valves in the pipeline are open.