laser etching metal service
The general handling methods are as follows when no fault code is displayed
I.Poor cooling effect:
1.Check if the heat dissipation temperature at the installation position of the machine is too high or otherwise
2．Check whether or not the filter screen is clean, because a cooling fin of the condenser might be dirty.
3．The normal service life span of the machine might be expired, and the original effect can be restored after replacing the compressor.
4．A part of the refrigerants may be leaking from the system.
II. Temperature volatility: Ensure the power supply voltage is neither too low nor too high far beyond the set temperature difference (the voltage between 197 ~ 242V is considered as normal), because the cooling solenoid valve and bypass solenoid valve cannot be normally switched if the voltage is low.
III. There is no water flow or the water flow is small: It might be as a result of either the air in the water pump is exhausted completely or the filter screen at the bottom of the water tank is blocked. Check whether the water pump capacitance is poor, and whether the relay controlling the water pump is closed.
The general handling methods are as follows when the fault code is displayed
Check whether the resistance value of the temperature sensing probe is about 20 and about 5kΩ, the resistance value of the probe will be changed if touched by hand, and if the resistance value is too small or there is no resistance value, it indicates that the probe is in poor condition.
Ultra-high and ultra-low temperature alarm: ：
1. Check whether or not the air in the water system has been discharged completely, the water outlet can be pulled out to make the water flow out naturally and then the machine can start after installation.
2.If the filter screen at the bottom of the water tank is blocked, it must be cleaned
3.Is there flat phenomenon of the water inlet at the water pump?
4.The pump itself is not rotated due to getting suck or the coil is disconnected or the capacitance is in poor condition.
5.The water pump has water circulation, and if the flow switch is not switched on, the flow switch may be faulty. No water flow or small water flow: Either the air in the water pump is exhausted completely, or the filter screen at the bottom of the water tank is blocked, or the water pump capacitance is poor. Checks must be done to ensure whether the relay controlling the water pump is closed.