Description
Product Description: Qunda QD-U30A+ Universal Air Conditioner Control System The Qunda QD-U30A+ is a premium universal electronic control board kit specifically engineered for repairing, upgrading, or retrofitting ceiling cassette and light commercial air conditioning units. When an original manufacturer’s circuit board fails and an exact factory replacement is unavailable or too expensive, this kit serves as an all-in-one remedy. It comes complete with a main multi-relay PCB, an external transformer, dual temperature sensors (room and pipe coil), an LED display receiver panel, and a fully featured wireless remote control. Key Technical Specifications Model: QD-U30A+ Application Scope: Ceiling Cassette, Ducted, and Light Commercial split AC units Power Input: 220V–240V AC, 50/60 Hz Working Modes: 5 selectable modes (Auto, Cool, Dry, Fan, Heat) Fan Speed Control: 3 distinct fan speed relay outputs (High, Medium, Low) Sensor Logic: Precision double sensors for exact temperature monitoring and efficient auto-defrost cycle management. Safety Protections: Outdoor condenser fan is controlled independently; built-in delay timers protect the compressor from short-cycling; features an auto-restart function following power surges or cuts. Compatible Machines & Brands Because it is a universal light commercial kit, its compatibility is determined by wiring layout, capacity limits, and system type rather than a specific brand name. Compatible Machine Types Ceiling Cassette Units: Perfect for 2×2 or 3×3 ceiling-recessed cassette air conditioners typically found in offices, shops, and larger living spaces. Under-Ceiling & Floor-Ceiling Units: Fits exposed commercial suspended units. Ductless Split Systems (High Capacity): Can be adapted for heavy-duty high-wall split systems that match its terminal configuration. Tonnage Range: Most configurations natively handle light commercial systems ranging between 1.5 Ton up to 3.0 Ton (roughly 18,000 BTU to 36,000 BTU) depending on the relay current draw of the specific components. Compatible Brands It can be retrofitted into the non-inverter (fixed-speed) or compatible light commercial systems of almost all global HVAC brands, including: Midea / Carrier / Toshiba (Very common for replacing failing cassette boards in these chassis layouts) Gree * Daikin (Fixed-speed, non-VRV commercial models) York Panasonic Mitsubishi Heavy Industries / Mitsubishi Electric (Conventional relay-driven architectures) Voltas / Lloyd / Blue Star ⚠️ Installation Note: Universal boards require manual re-wiring of the fan motor tap terminals, swing louvers, and compressor contactor lines. Installation should be carried out by a certified HVAC technician to ensure correct relay matching.
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