Summer is one of the toughest seasons for industrial chillers. Higher ambient temperatures, increased production loads, dust buildup, and unstable power supplies can all make a chiller work harder than usual.
If your industrial chiller starts displaying frequent alarms during hot weather, don't assume it's a sign of equipment failure. In many cases, these alarms are built-in protection mechanisms that help prevent overheating and protect key refrigeration components.
Here are six common causes—and what you can do to reduce unnecessary alarms.
1. Make Sure the Chiller Has Enough Ventilation
Poor airflow is one of the most common reasons for summer overheating.
For most TEYU air-cooled chillers, the recommended installation clearance is:
* Low-power models: At least 1.5 m above the air outlet and 1 m around the air inlet.
* High-power models: At least 3.5 m above the air outlet and 1 m around the air inlet.
Adequate clearance prevents hot exhaust air from circulating back into the condenser, helping the chiller maintain stable cooling performance.
2. Check the Power Supply
Summer often brings heavier electrical loads, which can cause voltage fluctuations.
TEYU recommends keeping the supply voltage within ±5% of the rated input voltage. If power is unstable, using a properly sized voltage stabilizer can help prevent unnecessary alarms and improve compressor reliability.
3. Keep the Ambient Temperature Under Control
Even a properly functioning chiller has limits.
For most TEYU industrial chillers, the recommended ambient operating temperature is 20°C–30°C (68°F–86°F). If the surrounding temperature remains above 40°C (104°F), the chiller's high-temperature protection may be triggered.
Improving workshop ventilation or adding auxiliary cooling can help maintain stable operation during extreme heat.
4. Clean the Condenser Regularly
Dust buildup reduces airflow and heat dissipation, forcing the refrigeration system to work harder.
Clean the condenser and air filter regularly using compressed air. In dusty workshops, more frequent cleaning is recommended to maintain cooling efficiency and reduce energy consumption.
5. Replace Cooling Water Periodically
Over time, circulating cooling water can become contaminated, reducing heat transfer efficiency and increasing the risk of corrosion.
TEYU recommends replacing the cooling water approximately every three months, using distilled or purified water, and cleaning the water tank during water replacement.
6. Inspect the Water Filter
A clogged filter can restrict water flow and reduce cooling performance.
Regularly clean the filter screen and replace the filter element according to the manufacturer's maintenance recommendations to keep the cooling system operating efficiently.
An Alarm Doesn't Always Mean Something Is Broken
Many users assume a high-temperature alarm indicates equipment failure. In reality, industrial chillers are designed to protect themselves when operating conditions become unfavorable.
Simple maintenance, such as ensuring proper ventilation, cleaning the condenser, maintaining stable power, and replacing cooling water regularly, can significantly reduce summer alarms and improve long-term reliability.
If alarms continue after routine maintenance, it's best to contact the equipment manufacturer or service team for further troubleshooting.
Why this matters
Preventive maintenance takes far less time and cost than unexpected downtime. Spending a few minutes checking ventilation, water quality, and cleanliness can help your industrial chiller operate more reliably throughout the hottest months of the year.
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