Troubleshooting and Handling of Common Malfunctions in the Cooling System of Laser Cleaning Machines

Mastering common troubleshooting methods during the use of laser cleaning machines can help you quickly identify the cause of problems and reduce downtime.

Fault 1: The coolant temperature is too high and cannot reach the target temperature

Possible Causes:
Severe dust accumulation on the chiller heat sink, reducing heat dissipation efficiency.
Insufficient refrigerant (applicable to refrigeration chillers).
Ambient temperature is too high, exceeding the chiller’s design range.
Insufficient chiller power is incompatible with the laser generator.
Insufficient cooling water volume.

Solutions:
First, clean the heat sink. Then check if the cooling water volume is sufficient and confirm that the ambient temperature is within a reasonable range. If none of the above are the problem, consider having a professional inspect the cooling system to determine if refrigerant needs to be replenished.

Fault 2: Water Flow Alarm, Equipment Shutdown Protection

Possible Causes:
Clogged filter, causing reduced flow rate.
Pump malfunction, reducing head.
Blockage in the pipeline (scale, algae, foreign objects).
Leaking pipeline joints, causing reduced system pressure.
Damaged flow sensor, causing a false alarm.

Troubleshooting:
First, check the filter; clean or replace it. Then check the pipeline for obvious blockages or leaks. If both are fine, check if the water pump is operating normally and if the flow sensor reading is reasonable.

Fault 3: Cooling Water Pipeline Leakage

Possible Causes:
Aging or loose pipe joints
Wearing and cracking of hoses
Damaged quick-connect fitting seals

Solutions:
Immediately stop the machine upon discovering a leak and locate the leak point. For loose joints, retighten them; for damaged seals, replace them; for cracked hoses, replace them with hoses of the appropriate specifications. After repair, check the cooling water level and replenish to the normal level before restarting the machine.

Fault 4: Reduced Laser Power and Deteriorated Beam Quality

Possible Causes:
This phenomenon doesn’t necessarily point directly to the cooling system, but poor cooling is often a significant cause. When the laser generator temperature is too high, the laser conversion efficiency decreases, and the beam quality deteriorates.

Solutions:
Check if the cooling water temperature is within the normal range and if the cooling water flow rate is adequate. If the cooling system is operating normally, the problem may lie with the optical components (lens contamination) or the laser generator itself, requiring further investigation.

Fault 5: Chiller compressor frequently starts and stops or operates abnormally

Possible causes:
Poor condenser heat dissipation (dust accumulation)
Too much or too little refrigerant
Expansion valve malfunction
Compressor malfunction

Solution:
First, clean the condenser, then observe the compressor pressure reading (if the chiller has a pressure gauge). If the abnormality persists, this type of problem involves refrigeration system expertise; it is recommended to contact a qualified refrigeration repair technician for assistance. Do not attempt to disassemble the refrigeration system yourself.