Indoor Control Circuit Board for Alegria Platinum CPA-09

ComfortStar C70090002 Indoor Control Board – OEM Module for Alegria Platinum CPA-09 Systems

The ComfortStar C70090002 is the designated indoor control board for the Alegria Platinum CPA-09 ductless system. This logic board governs all primary indoor functions including fan motor operation, thermistor signal processing, and communication with the outdoor inverter unit. It is engineered to deliver reliable control performance within the system's factory parameters.

Designed for direct replacement, the C70090002 features terminal connections and mounting points that align with the CPA-09 indoor unit. Its firmware and circuit layout support system diagnostics, operational safety interlocks, and modulation control required in inverter-based split systems.

Core Features

• Control Interface: Manages indoor unit logic, sensor feedback, and system mode transitions
• Signal Communication: Maintains real-time data exchange with the outdoor board for synchronized inverter performance
• Integrated Relays: Controls fan speeds and valve actuation within specified operating conditions
• Error Code Display: Supports diagnostic LED signaling to assist in service and fault identification
• Factory Harness Matching: Includes factory-aligned connectors for straightforward replacement with no field rewiring

Technical Specifications

• Part Number: C70090002
• Application: Indoor control board for ComfortStar Alegria Platinum CPA-09 models
• Voltage: 24V control signal input
• Mounting: Panel-mounted, bracket-compatible with original unit design
• Compliance: Designed to meet relevant HVAC electronics safety and reliability standards

Installation Guidance

Installation should be handled by trained HVAC technicians. Prior to servicing, power must be disconnected and capacitor discharge confirmed. Wiring should follow factory diagrams provided in the service manual. After installation, test communication, fan motor outputs, and thermistor response before system startup.

• Recommended Tools: Multimeter, insulated screwdriver set, wiring diagram for CPA-09
• Precautions: Ground yourself to prevent static discharge when handling PCB

Field Application Notes

• Used for restoring control in CPA-09 indoor units experiencing signal failure, sensor misreadings, or non-responsive fan operation
• Verify compatibility before replacement; not interchangeable with control boards for other ComfortStar indoor models
• Ensure matching software revision if unit firmware versioning is in use

Professional Use Summary

This control board is an essential OEM component for service and repair work on ComfortStar CPA-09 inverter indoor units. Designed to integrate seamlessly with the original system architecture, the C70090002 restores full unit functionality with minimal field adjustment. Ideal for use during warranty repairs, scheduled replacements, or system re-commissioning following fault diagnostics.