Refer to the specific machine's documentation (e.g., the chiller or air handling unit manual), as the password is often listed there rather than in the general Eliwell SMP55 User Manual Hardware Interface: For advanced "exclusive" programming, a connection via a USB/TTL-I2C interface Device Manager software is required to bypass or reset internal locks. Safety Warning:
Press set to enter the password sub-menu. Use the arrows to select the numeric code and confirm with set .
| Code | Access Level | Notes | | :--- | :--- | :--- | | 222 | Full OEM | Used for Italian domestic market units | | -23 | Debug Mode | Enables hidden diagnostic parameters | | 7890 | Factory Restore | Resets all parameters to factory (Use with caution) | | service | Text-based | Some firmware versions allow alphanumeric via virtual keyboard |
Note: On some legacy models, the OEM password was or required navigating to a specific parameter like PA1 . eliwell+smp5500+password+exclusive
The exact of your SMP5500 (e.g., if it has RS485 built-in).
If the standard passwords do not work, the controller has likely been programmed with a custom "Exclusive" lock by the equipment manufacturer. Check the Manual:
Press SET again. The display will typically show 0 . Refer to the specific machine's documentation (e
Once inside the exclusive menu, technicians gain control over variables that dictate how the controller interacts with the physical world. Key exclusive parameter groups include: Probe and Input Configuration ( CnF / Prb )
This level grants access to deeper configuration settings, such as probe calibration or alarm thresholds. On many Eliwell devices, the default service password is 15 .
With great power comes great responsibility. Distributing the is a risk. If an unauthorized user inputs -19 , they can: | Code | Access Level | Notes |
If you are locked out completely, you must perform a hardware factory reset. Note that and returns the controller to an unconfigured state. Power down the unit entirely.
The display should show "PA1". Use the arrow buttons (up/down) to scroll through the menu until the label PA2 appears.
