Eliwell Ewcm 900 S [2021] -

| Code | Description | Typical Setting | Why | | :--- | :--- | :--- | :--- | | | Setpoint (Main temp) | 2.0°C (chiller) / -18°C (freezer) | Target temperature. | | r0 | Differential (Hysteresis) | 2.0°C | Compressor stops at St1 + r0? No – actually: Cut-in at St1 + r0; Cut-out at St1. Prevents short cycling. | | c0 | Probe offset/adjustment | 0.0 | Calibrate if probe reads 1°C off. | | tdF | Defrost interval | 6h | Start defrost every 6 hours. | | MdF | Maximum defrost duration | 30 min | Safety cut-off – stops defrost if probe fails. | | dtE | Defrost termination temp | 8.0°C (evaporator probe) | Stops defrost when evaporator reaches 8°C. | | Fnd | Fan mode | 2 (Fans on with compressor off? 0=off,1=on,2=delayed) | Mode 2: Fans start after compressor and delay (FSt). | | FSt | Fan delay after defrost | 5 min | Prevents hot air pulse in cold room. | | dod | Door open delay | 15 min | If door open >15 min, trigger alarm. |

: Flush panel mount, 72x144 mm dimensions, with a double 3.5-digit display. Connectivity : Native RS-485 port for integration with the Eliwell Televis supervision system. Refrigerant Support : Compatible with R22, R134A, R502, R404A, R407, and R507. Eliwell France 🌟 Top Features & Functionality Adaptive Control

: It includes a clock for setting different operation setpoints during various time periods, such as "Normal" or "Economy" modes to reduce energy consumption.

Provides temporary shutdown of alarms during maintenance. The Eliwell EWCM 900 S eliwell ewcm 900 s

This controller is part of the Eliwell product line, which is a well-known brand in the refrigeration control systems market. Eliwell products are designed to provide efficient, reliable, and easy-to-use solutions for managing refrigeration systems.

Whether you are a refrigeration technician, a plant engineer, or a facility manager, understanding this controller is key to optimizing your system. What is the Eliwell EWCM 900 S?

The is a robust, highly stable workhorse for multi-compressor system management. By merging strict safety controls with intelligent runtime balancing and energy-saving algorithms, it ensures refrigeration plants run reliably under fluctuating environments. For technicians and facility managers, mastering its parameters means ensuring lower operating costs, fewer emergency service calls, and optimal preservation of temperature-sensitive inventory. | Code | Description | Typical Setting |

If you are currently setting up or diagnosing a system, let me know: What are you encountering?

Usually 12Vac/dc, 24Vac/dc, or 230Vac (depending on sub-model variant) Panel mounting (standard cut-out) or DIN-rail options Analog Inputs

One of the most valuable features of the is the TTL copy card capability. If you manage 50 cold rooms, you don't want to parameterize each manually. Prevents short cycling

Even the most reliable controllers can encounter issues. Here is a quick troubleshooting guide.

The EWCM 900/S is designed to offer precise control and operational flexibility. Key features include:

Check wiring continuity; measure voltage output of the sensor. High Pressure Alarm Condenser fan failure or blocked coil

Route low-voltage signal wires (probes, digital inputs, communication buses) away from high-voltage power lines to prevent electromagnetic interference (EMI).