Entering the "Manufacturer" or "Service" menus allows you to change critical parameters like PID loops, setpoints, and fan status. Incorrect settings can cause equipment damage or system failure. Always consult the specific manual for your equipment brand before making changes. UNITED COOL AIR | CAREL PCO CONTROLLER PASSWORD

: On some units, pressing the UP arrow and PRG key simultaneously may bypass certain factory lockouts, though this is software-dependent. Accessing pCOWeb (Web Interface)

: The most frequent default for "Technician" or "Service" menus. 0000 : Often used as a basic factory entry point.

: Use the UP or DOWN arrows to scroll to "Service," "Manufacturer," or "Settings," then press ENTER .

settings is a standard part of HVAC maintenance, but finding the right can be tricky because it varies by manufacturer and access level. Common Default Passwords

While many OEMs (Original Equipment Manufacturers) set their own unique codes, several default passwords are commonly used across the Carel pCO sistema line: