End of Line Testing

Every standard chiller and heat pump manufactured at the Mayekawa factory undergoes a full End-of-Line Test (EOLT) before shipment, and is delivered with a corresponding EOLT report traceable to its serial number upon request. Testing is performed at our in-house test facility immediately after final assembly, and covers:

• Full-load thermal performance test — the unit is run at its rated operating point to verify measured cooling or heating capacity and total unit power input against the design values, in accordance with EN 12900 tolerances and the EN 14511/EN 14825 testing and calculation methodology. Suction and discharge pressures and temperatures, oil temperature, and motor current are logged with calibrated instrumentation.

• Thermal imaging of key points — infrared thermography of compressor bearings, motor terminals, electrical connections and shaft seals under load, to catch abnormal heat generation (loose connections, insufficient lubrication, misalignment) before the unit leaves the factory.

• Vibration measurements — broadband vibration analysis on the compressor and motor bearings, screened against Mayekawa's internal acceptance limits, to catch imbalance, misalignment or early-stage bearing defects prior to dispatch.

Every unit is EOLT-tested as standard. A customer-witnessed Factory Acceptance Test (FAT), with test conditions agreed in advance, is available on request.