The navigation process can differ slightly depending on the specific keypad (like the pGD1 user interface) installed on your pCO5: : Press the PRG button on the keypad.

If you can tell me the (e.g., Aermec, Carrier, Liebert) and the type of unit (chiller, AHU), I can try to help you find the specific password.

: The standard factory default for many generic CAREL service and manufacturer menus.

You will need the original software files ( .bin , .blx , .pco ) from the OEM. Load the files onto a USB flash drive formatted to FAT32.

Once access is regained, or when configuring a new system, it is vital to implement proper security measures:

Before entering codes, it is important to understand that the Carel pCO5 utilizes a tiered access system. Passwords are set up to prevent unauthorized users from changing critical parameters that could damage compressors, fans, or sensors. Access is generally divided into three distinct levels: