Daikin-McQuay 7009438 Circuit Board 321702-401 check for 4-flash error codes

check for 4-flash error codes on the status LED

How do I ensure this motor doesn't overheat

this switch acts as a primary safety control by opening the circuit when the internal temperature reachs 230 degrees Fahrenheit and resetting when it cools by 30 degrees

As the designated direct replacement for 2803-500

Frequent tripping usually indicates a restricted airflow issue

Daikin-McQuay 7009438 Circuit Board 321702-401 check for 4-flash error codesThe Daikin McQuay 7009438 Circuit Board is a critical control component engineered for high performance HVAC systems, particularly within Daikins Variable Refrigerant Volume (VRV) and commercial heat pump lineups. As a veteran technician knows, this OEM replacement circuit board acts as the central processing unit, managing complex communication between the indoor and outdoor units while precisely regulating refrigerant flow control and compressor