Main Control Board 300027060011

Part Code: 300027060011
Type: Main PCB (Printed Circuit Board)
Compatibility: Multi-zone mini split system
Compatible Model: TM42H5O

The 300027060011 main board is the central intelligence unit for the WELLS multi-zone system TM42H5O, responsible for managing multiple indoor units connected to a single outdoor condenser.

Key functions include:
Inverter compressor management
EEV (Electronic Expansion Valve) control
Fan, pressure, and temperature sensor regulation
Real-time load modulation per zone
System safety protections (overload, communication errors, auto shutdown)

Built for R-410A multi-zone systems, it ensures stable, efficient performance and precise zone control.