Indoor Control Circuit Board for Alegria Platinum TPA-24

ComfortStar C42591539 Indoor Control Board – OEM Module for Alegria Platinum TPA-24

The ComfortStar C42591539 is the factory indoor control circuit board for Alegria Platinum TPA-24 mini-split systems. This board serves as the primary logic controller for indoor operations including fan speed regulation, temperature sensing, mode control, and communication with the outdoor unit.

It processes inputs from room and coil thermistors, manages operation of the fan motor and swing actuator, and relays data to the outdoor inverter board. The unit is built for direct system compatibility with no field modifications required for standard replacement in ComfortStar TPA-24 series handlers.

Functional Overview

• Part Number: C42591539
• Application: Alegria Platinum TPA-24 indoor air handler
• Voltage: 24V signal input
• Role: Controls indoor unit logic and synchronizes with outdoor PCB via communication bus
• Inputs/Outputs: Supports thermistor inputs, fan motor outputs, display interface, and swing motor

Installation Requirements

Installation should be performed by licensed HVAC technicians. Always disconnect power before handling. Match wire harnesses and mounting locations with the original board. Confirm thermistor values, display function, and fan operation after installation.

• Recommended Tools: Multimeter, insulated drivers, HVAC wiring diagram for TPA-24
• Handling Note: Use antistatic precautions during installation

Use Cases

• OEM replacement for failed or non-responsive indoor control board
• Component-level service during system troubleshooting or diagnostics
• Factory board for direct retrofit in TPA-24 air handlers

Key Features

• Pre-Matched for TPA-24 Systems – No adaptation required
• Manages Full Indoor Logic – Controls fan, swing, and thermistor signal paths
• Supports Outdoor Unit Sync – Ensures stable communication with inverter board
• Compact Footprint – Mounts in existing chassis bracket without alteration

Summary

The ComfortStar C42591539 indoor control board is the designated control logic module for Alegria Platinum TPA-24 ductless systems. It ensures consistent operation of indoor functions and reliable communication with inverter components. Ideal for system repair, maintenance, or full component replacement during field service calls.