When a chiller alarms, record the code and operating conditions first. Check accessible flow, temperature and ambient indicators. Identify the cause rather than repeatedly resetting the unit or disabling protection.

High and low pressure

High pressure may involve condenser airflow or water flow, fouling or another circuit fault. Low pressure requires assessment of load, refrigerant feed, leakage and controls. The alarm name alone does not provide a diagnosis or determine the refrigerant charge.

Flow and freeze protection

Check valve positions, filters and pump operating indications. Investigate air in the circuit and sensor errors as well. Raising the setpoint or bypassing a flow switch is not a reliable remedy for a freeze alarm.

Information for service

Provide the model and serial number, alarm code, time, water temperatures, ambient conditions and recent work. Refrigerant and electrical interventions belong to qualified service personnel. Follow the facility shutdown procedure for smoke, burning odour or major leakage.

Project inputs and calculation boundaries

For a quotation, specify approximate heat duty, fluid, inlet and outlet temperatures, flow, pressure loss and operating hours. Design ambient conditions, indoor or outdoor location and electrical infrastructure are also selection inputs. Flow and temperature readings must represent the same operating point. Do not transfer a catalogue capacity directly to different temperatures; confirm model performance at the required duty.

Commissioning and operating records

Check circuit cleanliness, filtration, air removal, proven flow and sensor readings. Record reference water temperatures and load conditions during commissioning. These values provide a baseline for maintenance and alarm investigations. Confirm pumps, tanks, connections and control options against the agreed quotation scope.

Frequently asked questions

Is the series capacity range sufficient for final selection?

No. Confirm the actual model at the required fluid temperature, ambient conditions, fluid properties and hydraulic duty.

Is cooling capacity the electrical consumption?

No. Cooling kW and electrical-input kW are different quantities. An energy assessment also needs actual load and operating hours.

What information is needed for a quotation?

Provide the industry or equipment, target temperature, approximate duty, flow, ambient conditions, operating hours and details of the existing system.

These explanations provide general engineering guidance. Examples are not field measurements or performance guarantees for a particular model.