Motion sensor (PIR), door switch, and voltage monitors
The EMS 25 features a simplified interface for manual interaction:
A PF1 code means the refrigeration compartment sensor failed, while PF2 points to the condenser sensor. Elstat Ems 25 Advanced Manual
The quick-start guide shows a 2-point calibration (0% and 100%). The Advanced Manual reveals the (Parameters L-01 through L-06 ).
Enter the advanced menu and scroll to FWV (Firmware Version). Motion sensor (PIR), door switch, and voltage monitors
| Terminal | Function | Advanced Tip | | :--- | :--- | :--- | | 1-2 | Power Supply (L-N) | Use a dedicated circuit. Do not share neutral with high-inductive loads without a filter. | | 3-4 | Compressor Relay (NO) | For inductive loads (compressors >1HP), install an external contactor. The internal relay is rated for 16A resistive. | | 5-6 | Defrost Relay (Heating) | If using electric defrost, ensure the relay switches the contactor coil, not the heater directly. | | 7-8 | Evaporator Fan Relay | Fan delay parameters (FON / FOFF) rely on this connection. | | 9-10 | Probe Input (Sonda) | Polarity matters for PTC probes. Red wire to terminal 9 (signal), black to 10 (ground). | | 11-12 | Digital Input (Door) | Use volt-free contacts. Parameter i2P determines if NC (normally closed) or NO (normally open). |
Safety is paramount during installation. Disconnect the main power supply before handling any electrical connections. Mount the controller securely away from direct moisture, extreme heat sources, or high-voltage lines that could introduce signal interference. Terminal Wiring Configuration Main AC Power Input (Live and Neutral). Enter the advanced menu and scroll to FWV (Firmware Version)
: Continuously updates a 7-day schedule split into 30-minute intervals based on PIR motion sensor data. Elstat EMS25 Plus User Guide | PDF | Temperature - Scribd
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: Press Set again. Use the Up or Down keys to enter the factory standard access code (commonly 21 or 55 depending on OEM firmware). Press Set to confirm.
In the world of commercial refrigeration, precision isn't just a luxury—it is a necessity. For businesses ranging from high-end restaurants and bustling hotel kitchens to pharmaceutical storage labs and convenience stores, maintaining exact temperature parameters is critical for safety, compliance, and cost savings.