Dishwasher Not Filling, or Overflowing Mid-Cycle and Soaking the Cabinet? NL-DLS-6 Water-Level Pressure Switch and Overflow Life Bench, Six Stations (level sensor life test)

Dishwashers that will not fill, will not stop filling, or overflow mid-cycle and run water out of the door onto the kitchen cabinet are the most direct complaints in the category, and the ones most likely to turn into water-damage claims. The cause is usually a water-level pressure switch tripping at the wrong pressure, a diaphragm aged by long hot-water soaking, a pressure chamber clogged with scale and food debris, or an overflow float that sticks and never resets. Inside a complete machine the only observable is whether one programme finishes, so trip pressure, reset hysteresis and operating life are left completely unrecorded, and the parts supplier and the machine maker argue with no number in common.

What the NL-DLS-6 water-level pressure switch and overflow life bench measures

• Six stations in parallel, trip and reset pressure calibrated per unit with hysteresis output (built on the same pressure and cycle-counting module as our level sensor life test machines)
• Tens of thousands of pressure-up and pressure-down cycles, tracking trip-point shift and rising contact resistance
• Pressure chamber sealing and diaphragm ageing: trip pressure re-measured after hot-water immersion to capture the misjudgement caused by a hardened diaphragm
• Overflow float trip and reset testing, reproducing the stuck float that overflows without an alarm (verified against machine fill rhythm with our dishwasher test equipment)
• Low-water protection and fill-timeout judgement: water supply cut and low inlet pressure simulated, with trip time logged
• Current and contact voltage drop capture, with barcode and batch binding and raw data exported per unit

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.25 (dishwashers – particular requirements), IEC 60335-2-5 (dishwashers), IEC 60436 (electric dishwashers – methods for measuring the performance), IEC 60730-2-8 (electrically operated water valves, including water-level controls), GB/T 20290 (household dishwashers – performance test methods) and GB/T 2828 sampling; criteria can follow the customer’s standard and the unit’s fill and overflow-protection requirements.

Stations and throughput

Six stations running 24/7 compress the weeks an operator would spend building a machine, running fill programmes over and over and then sending switches out for inspection into a few days, with trip pressure and overflow reset rechecked cycle by cycle — so incoming switches and end-of-line machines can both be sampled batch by batch, stopping no-fill, overfill and overflow alarms before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of dishwasher water-level pressure switch and overflow life benches, pump test bench and pump performance test systems, level sensor life test machines, dishwasher test equipment and washing machine test equipment.

Keywords: pump test bench, pump performance test, level sensor life test, dishwasher test equipment, washing machine test equipment.