The Carel pCO5 programmable controller uses a simple, two-level password scheme to protect service and manufacturer menus. By default both user passwords (PW1 and PW2) are numeric, four digits long. The factory default for PW1 and PW2 is 1234; if a password is forgotten the non‑modifiable manufacturer access code can be used to regain access — Carel’s documented recovery code for many pCO devices is 1315. Passwords can be changed from the SERVICE (PW1) and MANUFACTURER (PW2) branches in the menu using the terminal buttons (PRG/ENTER/UP/DOWN), and manuals show the exact menu path and steps for changing or initializing passwords.
| Display Message | Meaning | Solution | | :--- | :--- | :--- | | PASS (flashing) | Wrong password entered 3x | Wait 60 seconds (lockout timer). Cycle power or try a different level. | | InAC | Invalid access | The parameter is forbidden at all levels. Only editable via software. | | rEAd | Read-only | You have the correct password, but this is a live diagnostic value (cannot be changed). | | LOC or LOCL | Controller locked by remote supervisor | A BMS (Building Management System) has locked the keypad. Disable remote write via BMS. | carel pco5 controller password
If you have lost a custom password, use the universal Carel code The Carel pCO5 programmable controller uses a simple,
After a (via jumper on the board + power cycle), these defaults are restored. However, performing a factory reset erases all application logic – an impractical step for a live system. Passwords can be changed from the SERVICE (PW1)
If the common codes above do not work, the password is likely proprietary to your equipment. You can typically find it in the following places:
| Level | Access | Typical Password | |-------|--------|------------------| | | See parameters, no editing | None or 0000 | | User | Adjust setpoints, timers, basic settings | 0000 (often) or 1111 | | Service | Modify PID loops, alarms, configuration | 1234, 1500, or OEM-defined | | Manufacturer | Full access: all parameters, I/O, advanced logic | Varies (not publicly default; set by OEM) | | Supervisor/Installer | Commissioning, network settings | Often 4567, 4321, or blank |