Outdoor Main Circuit Board for Alegria Platinum CM4-48-4Z

ComfortStar 17122300001571 – Outdoor Main Circuit Board for Alegria Platinum CM4-48-4Z

The ComfortStar 17122300001571 is the primary outdoor control board designed for use with the Alegria Platinum CM4-48-4Z multi-zone heat pump system. This component manages all critical outdoor unit operations including compressor modulation, condenser fan motor control, inverter logic, and communication protocols across connected zones. It serves as the main control interface for system diagnostics, sequencing, and real-time performance coordination.

This board supports ComfortStar’s variable-speed operation, controlling system behavior based on real-time demand from indoor units. The PCB also includes integrated surge protection, status indication, and fail-safe logic in the event of system faults. Designed for outdoor installation, the board is housed in a protective enclosure and conforms to manufacturer specifications for CM4-48-4Z models.

Primary Functions

• Compressor Control: Coordinates start-up, ramp-up, and modulation of the inverter compressor
• Fan Operation: Manages condenser fan speed based on thermistor feedback
• System Communication: Interfaces with indoor PCBs via ComfortStar proprietary signal protocols
• Fault Reporting: Onboard diagnostics with fault codes for service and maintenance support
• Voltage Regulation: 24V input logic compatible with standard low-voltage control architecture

Technical Specifications

• Part Number: 17122300001571
• System Application: Outdoor unit controller for Alegria Platinum CM4-48-4Z
• Input Voltage: 24V control logic
• Board Type: Inverter-compatible outdoor main PCB
• Installation: Factory screw-mount into system control cabinet

Installation Notes

Only qualified HVAC technicians should handle installation or replacement of this board. Proper shutdown procedures, wiring verification, and functional testing must be performed to ensure correct operation and system safety. Verify part number compatibility prior to replacement to avoid electrical mismatch or firmware conflicts.

Recommended Tools for Installation

• Insulated screwdriver set
• Multimeter (for continuity and voltage checks)
• Wiring diagram from system service manual
• Protective gloves and eyewear

Applications

• Direct replacement for failed or damaged main outdoor control boards in CM4-48-4Z systems
• Service part for restoring inverter functionality in ComfortStar multi-zone configurations
• Used during system board-level diagnostics or during factory PCB upgrade