The of the HVAC equipment (e.g., Carrier Chiller, Vertiv CRAC).
Many manufacturers (like Carrier, Aermec, or United Cool Air) change the default CAREL passwords to their own proprietary codes (e.g.,
⚠️ There is if an OEM has locked the controller. The password is stored in flash memory; only an OEM-supplied tool (Carel’s pCOStudio or c.Suite ) can override it via serial or USB connection.
Logins typically expire after a few minutes of inactivity to prevent unauthorized access. Parameter 22: Note that while some smaller CAREL controllers (like the as a standard password, the carel pco5 controller password
However, security is a double-edged sword. Once a technician sets a password or an OEM (Original Equipment Manufacturer) locks the device, subsequent maintenance becomes a nightmare. If you have forgotten the , or if you inherited a machine from a previous owner who didn’t leave the code, this guide is your lifeline.
Connect a laptop to the pCO5 via a or a USB-to-RS485 converter . Use Carel's ksub or pCO Manager software utilities.
steps for a particular task, such as changing setpoints or updating firmware? UNITED COOL AIR | CAREL PCO CONTROLLER PASSWORD The of the HVAC equipment (e
If you are locked out of a pCO5 controller, use the following systematic troubleshooting approach: Check Common Universal Codes
Use the arrows to change the value of the blinking digit. Press Enter to move to the next digit.
1985 or matching the current year/software version. 4. How to Reset or Recover a Lost pCO5 Password Logins typically expire after a few minutes of
: Used as an "Operator" login for certain end-user settings.
Use the arrow keys to scroll down to the menu option. Press Enter .
