DunAn SH-W2b 400 580A Air Conditioner 4-Way Valve Coil 220V 1.1cm (Arçelik - Beko Original)

The original electromagnetic coil that controls the 4-way valve (reversing valve) which switches air conditioners between heating and cooling modes. This DunAn OEM spare part, used as factory fit in Arçelik and Beko air conditioners, is the definitive solution service technicians can rely on in the field for "air conditioner does not switch to heating" or "does not switch back to cooling" complaints at seasonal changeovers.

Key Technical Specifications and Label Values

• Brand and Model: DunAn / SH-W2b 400 580A (Production code on the product: 151001W)
• Operating Voltage: AC 220-240V 50/60Hz (Fully compatible with the outdoor unit PCB output, stable pull-in force)
• Power Consumption: 7/5W (Highly tolerant design against heating and winding burn-out under prolonged energization)
• Central Hole Diameter: 1.1 cm (11 mm). It sits fully and without play on the valve stem (body), transferring the magnetic field without loss.
• Cable and Terminal Design: Thanks to cables resistant to harsh outdoor unit conditions (105°C 600V) and fully insulated female faston (spade) terminals, it offers plug-and-play installation without additional work.

Technician Tips and Field Installation Warnings

• Before fitting the new 4-way valve coil, check whether the mechanism (slide) inside the brass valve body in the system is mechanically stuck. If the valve is locked internally, it will not switch even if the coil is good.
• Do not force the coil when sliding it onto the valve stem during installation; it should pass easily into the 1.1 cm diameter hole, and the fixing screw/clip must be fitted tightly so that it does not make noise due to outdoor unit vibration.
• When connecting the insulated terminals (spades), check the corresponding male terminals for moisture-related oxidation; poor contacts cause the coil to pull in weakly and operate noisily.