is a versatile programmable controller designed for HVAC/R applications within the family. To protect critical system settings and prevent unauthorised modifications, the device employs a password-protected multi-level access system. Standard Access and Default Passwords
This technical guide uncovers how to bypass basic restrictions, navigate critical parameters, and use official development tools to secure or optimize your hardware. The Eliwell SMP5500 Architecture The Eliwell FREE Smart SMP5500 series
Given the vital role these controllers play, following robust security practices is not optional—it's an operational necessity.
: It features a wide range of inputs and outputs (5 analogue inputs, 6 digital inputs, 5 analogue outputs, and 6 digital outputs). It supports Modbus RTU communication and can be expanded with additional modules. Programmability : Unlike standard thermostats, the
: Press and hold the set (or Menu ) key for at least 5 seconds until the first folder code appears on the screen. eliwell+smp5500+password+exclusive
You tried -19 . You tried 321 . Nothing works. The screen still says "Loc" (Locked). Here is the exclusive troubleshooting guide:
Master Guide: Unlocking the Eliwell SMP5500 Go to product viewer dialog for this item. Password & Exclusive Programming Modes The Eliwell FREE Smart SMP5500 Go to product viewer dialog for this item.
Press and hold the set (or dedicated menu) key for more than 5 seconds until the display shows the first folder or a password prompt (often displayed as PA1 or PA2 ).
Setting the unique Modbus RTU network ID for integration into overarching Building Management Systems (BMS) or Eliwell Televis systems. is a versatile programmable controller designed for HVAC/R
Used to access the full programming menu and configuration folders. The common factory default for Eliwell installer access is 22 or 15 . Exclusive Customer Parameters
Press and hold the set or menu button for three seconds until the first folder code appears.
| Feature | Action Item | | :--- | :--- | | | Usually 0 (disabled). Enable it for safety. | | Default Installer Password | Often 15 or 22 . Change this immediately. | | Exclusive Access | Manufacturer level; no public password. | | Lost Password | Try common codes first ( 22 , 15 , 0 ). Otherwise, contact Eliwell support. | | Best Practice | Document all password changes. Keep a copy of your configuration using the MFK 100. |
A unique feature of the Eliwell FREE series is the ability to bypass individual parameter entry entirely. The is a Multi Function Key that can be used to: The Eliwell SMP5500 Architecture The Eliwell FREE Smart
For deeper "exclusive" access or application development, the hardware must be interfaced with external tools:
uses a hierarchical menu system to prevent unauthorized changes. According to standard Eliwell manuals , the menu structure is divided into:
This "exclusive" level is for developers using the Free Studio development tool .
Always try the default manufacturer codes found in the official Eliwell programming manual first (common defaults across lines include 00 , 22 , or 77 , though specific SMP series may vary).
| Approach | Effectiveness | Difficulty | |----------|---------------|-------------| | Contact OEM brand (e.g., cooler manufacturer) | High – they may give password or a special procedure | Low | | Use Level 2 (Advanced) password (usually 2222 or 3210 ) | Medium – covers 95% of field adjustments | Very low | | Perform a factory reset via hardware jumper (if available) | High – resets to Eliwell default, but may erase OEM settings | Medium | | Replace controller with a new, unlocked SMP5500 | Guaranteed access to all levels (default Exclusive might be blank or 0000 on fresh units) | High cost |