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IFB Air Conditioner CONTROLLER 900X - 18K3S NXG
HomeAir ConditionerIFBIFB Air Conditioner CONTROLLER 900X - 18K3S NXG
Genuine

IFB Air Conditioner CONTROLLER 900X - 18K3S NXG

Part No : IU221ECPCN020Origin : Genuine
Rs 2,093.00
(Incl. of all taxes)
In Stock
About this item

The IFB 900X - 18K3S NXG Air Conditioner Indoor Main Controller PCB (Part Number: IU221ECPCN020) is an authentic original equipment manufacturer (OEM) replacement motherboard designed for select 18K3S NXG series air conditioning systems. Mounted securely inside the indoor evaporator chassis enclosure, this advanced microcontroller board serves as the central processing unit, regulating incoming power, stepper motors, temperature sensor feedback, infrared remote commands, and outdoor unit communication signals.

Key Features

  • Microcontroller Logic Board: Pre-programmed with IFB firmware to govern cooling cycles, setpoint temperatures, timer routines, and inverter compressor modulation.

  • Integrated Transformer & Power Regulation: Converts incoming AC voltage to stable DC supply rails for logic circuits, relays, and display connections.

  • Moisture-Resistant Conformal Coating: Factory-applied protective lacquer coating shields sensitive microchips, relays, and solder traces from indoor humidity and condensation.

  • Secure Plug-and-Play Terminal Connectors: Factory-molded multi-pin wire harness blocks ensure secure, vibration-resistant attachment to power inputs, thermistors, and fan motors.

  • Exact Chassis Mounting Geometry: Engineered with precise screw standoffs and snap-in locking tabs for a direct drop-in fit into the indoor unit control box.

Benefits

  • Solves symptoms such as an unresponsive air conditioner, failure to power on, error codes flashing on the indoor display, erratic fan speeds, or loss of communication between indoor and outdoor units.

  • Replaces burned-out, power-surge damaged, or moisture-corroded main control boards.

  • Direct OEM replacement guarantees 100% compatibility with 18K3S NXG electrical ratings and sensor calibration curves.

Applications

Designed specifically for select IFB 900X - 18K3S NXG air conditioning models requiring indoor main controller PCB part number IU221ECPCN020.

What's Included

  • 1 x Genuine IFB 900X - 18K3S NXG Indoor Main Controller PCB Assembly (IU221ECPCN020)

Usage Instructions

1.Isolate Mains Power:Prerequisite.

Turn off the dedicated AC circuit breaker and unplug or disconnect the indoor unit from the mains power supply before servicing.

2.Access Control Box:3 min.

Remove the front plastic grille and metal control box enclosure cover on the indoor unit to expose the main circuit board.

3.Document & Unplug Harnesses:3 min.

Take a clear, detailed reference photograph of all wiring connections, then carefully unplug each wire harness, sensor plug, and power connector from the board.

4.Swap Control Board:2 min.

Unfasten the mounting screws or release the plastic locking tabs securing the old PCB, remove it, and snap/screw the new IFB IU221ECPCN020 board into place.

5.Reconnect & Test:3 min.

Reattach all wiring harnesses securely to their matching terminals using your reference photo, close the control box, restore mains power, and test operation.

Safety Instructions

High-Voltage Electrical Safety Warning

Always isolate mains power at the circuit breaker before opening internal service panels. Capacitors on the board can retain dangerous electrical charges even after power is disconnected. Handle circuit boards by their edges using ESD precautions.

Care Instructions

  • Keep the electrical enclosure box completely sealed and free from dust, insect ingress, or moisture accumulation.

Technical Specifications

AttributeSpecification
BrandIFB
Model / Part NumberIU221ECPCN020
Component TypeIndoor Main Controller PCB Assembly / Motherboard
Series Compatibility900X - 18K3S NXG
Appliance TypeSplit Air Conditioner (Indoor Unit)
Country of OriginIndia
Package Contents1x Indoor Main Control Board Assembly
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Delivery
Within 5 Days
Return
No Return
Warranty
No Warranty

Compatibility

Confirm compatibility before adding to cart.

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1

Common AC Problems

  • AC not cooling properly
  • AC compressor not starting
  • AC water leaking inside
  • AC PCB board failure
  • AC fan motor not working

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