Chiller maintenance and common faults and troubleshooting methods
Chiller maintenance
Please 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, so that the water temperature in the cavity rises, the mold will not produce rust.
If the chiller has been used for more than six months, or the high and low pressure engine often fails, or the cooling capacity is reduced, please arrange for the staff 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 chiller malfunctions after performing multiple cleanings as described above, please arrange for the staff to perform repairs.
   If the chiller is deactivated for a period of time, the pump pump may solidify due to the solidification of the water. When the machine is turned on, the pump rotor must be turned loose to avoid the pump leaves not turning, resulting in burnt fuses. (Applicable to chillers below 5)
    Cooling machine maintenance radiator cleaning
First stop the machine, remove the filter from the front lower panel 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.
Tip: The cleaning agent should be used with care. Do not touch the damaged skin. Do not touch the eyes. If you accidentally touch it, rinse it with plenty of water. You need to go to the hospital for treatment.
Common faults and troubleshooting methods for chillers
 Common faults and troubleshooting methods for chillers
malfunction
Solution
Turn on the power switch, the chiller power indicator is off.
1 The fuse is not installed and an appropriate fuse is added.
2 The power indicator 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
1 circuit short circuit fault check control wire and main power line
2 The pump rotor is stuck, and the motor rotor is loosened with a screwdriver (for chillers below 5)
Pump failure
1 pump motor coil is short, open circuit, repair motor coil or replace motor
2 The pump overload protector automatically trips, and the current limit of the protector is appropriately increased within the allowable range. Press the reset button halfway.
Compressor failure
1 compressor coil is short, open circuit, replace matching compressor
2 The compressor overload protector automatically trips, adjust the current limit of the protector to the allowable range and press the reset button.
Compressor frosting
1 circulating water circulation or valve is not opened, check the water valve, all the pipelines, to ensure smooth flow, install short-circuit pipelines.
2 The circulating water pipeline is too small, and the diameter of the circulating water pipe is increased to ensure the normal water circulation.
The temperature is displayed according to the temperature of the watch.
1 temperature control table is damaged, repair or replace the temperature control table
2 bad temperature line contact, repair or replace the temperature line
3 The temperature sensing line and the temperature measuring body are dirty, and the temperature measuring body is wiped clean.
Icing in the circulating water tank
1 corrected setpoint set temperature is too low
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 temperature control table out of control, replace the temperature control table
High voltage failure
Poor heat dissipation, dirty radiator, cleaning radiator
Can not wind, improve ventilation
The cooling fan does not work, check if the fan motor is burnt out, short circuit repair or replace the motor
High pressure engine damage, replacement of high pressure engine
Poor cooling
Insufficient refrigerant or pipeline leakage, replenishing refrigerant or repairing after leak detection, vacuuming and replenishing refrigerant
Poor heat dissipation, the radiator is too dirty, the radiator valve is not open or the opening is too small, the radiator is cleaned and the valve is fully opened.
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