This article provides a comprehensive guide to the password system on the . It covers the most common default passwords you're likely to encounter in the field, explains the different levels of access, and offers practical guidance on how to regain access if you've been locked out.
Note: Because the pCO5 is completely customizable, OEMs (like Carrier, Blue Box, or Clivet) often overwrite these defaults with their own proprietary codes. Check your specific unit's manual if the standard codes fail. 📂 Understanding the Access Levels
to gain access. If the code is correct, the protected sub-menus will unlock. Important Notes OEM Customization:
Before altering any parameter inside the password-protected zone, use a Carel Smart Key to copy the existing unit configuration.
A well-meaning service tech might have changed the password to prevent unauthorized access and then left the site without documenting it. Your only recourse here is a hard reset (see below). carel pco5 controller password
Release the button. The controller will revert all parameters—including access passwords—back to factory defaults ( 5555 ). Method C: Checking the Web Interface (pCOWeb)
arrows to find the "Technician" or "Settings" menu and press Input Code:
Sometimes the password is correct, but the specific parameter you are trying to change is locked by a higher level. If you are at Level 2 (service), you cannot change a Level 3 (config) parameter. You must log out and log back in with the higher-level password.
The uses different passwords depending on the access level required (e.g., User, Service, or Manufacturer) and the specific manufacturer using the hardware. Because the pCO5 is a programmable controller, original equipment manufacturers (OEMs) often set their own unique codes for HVAC units. Common Default Passwords This article provides a comprehensive guide to the
: Use the UP or DOWN arrows to find the "Technician" or "Service" menu.
The pCO5 uses a tiered password system to protect the unit's logic. By default, most pCO5 controllers are programmed with different levels of access:
Requires password (e.g., 1234 ). Access to probe calibrations, alarm thresholds, and I/O status.
OEMs frequently print their chosen service password directly in these technical literature segments. Step 2: Extract Password Clues from the Machine ID Check your specific unit's manual if the standard codes fail
The highest tier, used to alter the core application logic (often developed via 1tool). Default Passwords and Customization
| Scenario | Immediate Action | |----------|------------------| | | Try 1234 (Pr2) or 4321 (Pr3) | | Frozen supermarket rack / OEM chiller | Check OEM manual; try 1500, 3452, 4567 | | You have physical access and a laptop | Connect via USB-RS485 to pCOStudio – read application without password | | Nothing works & you have original application file | Perform JP4 reset, then reload the .bin or .pco file | | Customer changed it and forgot | No recovery except above methods – no "master override" |
For any facility or system utilizing a Carel pCO5 controller, it is a fundamental task of the startup and commissioning process to change the default passwords as a primary security measure. If you are locked out, a standard universal bypass code is unavailable, and the road to recovery goes through the OEM, the original programmer, or a careful factory reset.
The default password for many CAREL controllers is often 22 or 00 , though it can be customized by the OEM. Confirm: Press the [SET] button to enter.
Carel pCO5 Controller Password Report The Carel pCO5 controller uses several default passwords depending on the access level (Service, Manufacturer, or Web Interface) and the specific OEM application installed. 1. Keypad Access (pGD1 Terminal) To enter passwords via the physical keypad, press the button, navigate to the desired menu, and use the arrows to enter the code Service Menu (PW1)
On the pCO5’s built-in keypad (graphic or LCD with 5 buttons):