If the device is completely non-responsive, it may have a keypad lock engaged: Eliwell by Schneider Electric

Some variants of Eliwell industrial controllers display their internal software version or a temporary master override token on the screen during the first 5 seconds of booting up. Turn off the main circuit breaker, restore power, and closely watch the LCD screen for any brief diagnostic sequences. 2. The Universal Master Reset Procedure

The SMP5500 features a built-in safety timeout. If no button is pressed for 30 to 60 seconds, the controller automatically exits to the main display and locks the password level again. Work efficiently once access is granted. The Standard Password Does Not Work

does not work, you may need to consult the technical manual provided by the equipment manufacturer (the company that built the machine the controller is installed in), as they often set unique passwords for their proprietary settings. Are you trying to modify specific parameters like defrost cycles, or are you looking to reprogram the entire logic using the development software? IDPlus 978 - Eliwell

The Eliwell SMP5500 series utilizes a tiered password defense mechanism. Unlike basic thermostats, this unit separates standard end-user adjustments from core system parameters. Level 1: User Password (PA1) Facility managers, operations staff.

Continue holding the buttons until the display reads rSt or flashes rapidly.

Press the and set buttons simultaneously to enter the PAr menu. Use the UP arrow until the display shows PASS . Press the set key to open the password entry field.

Provides access to basic status variables and alarms.

By understanding these security protocols, you can ensure that your critical system settings remain protected while still allowing necessary operational access. For the most detailed and accurate information, always refer to the official manual from Eliwell. If you require the original installation and programming guides, you can download them from the official Eliwell website.

is designed for versatility in HVAC/R and industrial automation:

This is a powerful tool for mass deployment, but it also requires physical access to the device, adding another layer of physical security to your configuration.

The Eliwell SMP5500 is a programmable controller widely used in refrigeration and air conditioning units. When working with these units, technicians often encounter locked parameters or "Exclusive" menus that restrict access to critical system settings.