Gree 30224000028 Mini Split Indoor Unit Main Control Board Z4L25J GRZ4L-A

The Gree 30224000028 is an OEM main control board (PCB) designed for Gree mini split indoor air handling units. Also identified by board codes Z4L25J and GRZ4L-A, this board serves as the central electronic controller for the indoor unit, managing all core operating functions of the air conditioning system.

As the primary logic board, it interfaces with system sensors and components to regulate temperature settings, fan speed, operating modes, and system diagnostics. It is referenced in the official Gree UMAT-series replacement parts catalog for units including the GUD71W/A1-S cassette-style indoor units.

Key Features:

• Genuine OEM Gree replacement main control board
• Board codes: Z4L25J / GRZ4L-A
• Cross-references: 30224000084, 30224000064, Z4L25HJ
• Controls temperature regulation, fan speeds, operating modes, and system diagnostics
• Designed for Gree UMAT-series and GUD71W cassette indoor units
• Direct plug-in replacement — connects to all factory wiring terminals
• Sold as a single board

Replacing a failed main control board restores proper operation of the indoor unit, resolving issues such as failure to power on, erratic behavior, or loss of communication with the outdoor unit. Always disconnect power to the system before servicing electrical components.

OEM Part Number: 30224000028  |  Board Code: Z4L25J  |  PCB Reference: GRZ4L-A