Identical compressors without power fractionating.

Integrated alarms prevent damage to compressors from high-pressure surges or low-pressure scenarios.

Configure the safety delay timers ( tdA ) to prevent nuisance tripping during transient startup states. Diagnostics and Troubleshooting

Racks where compressors vary in size and power ratings, requiring asymmetric staging.

The Eliwell EWCM 900 S is a reliable and feature-rich refrigeration controller designed for commercial and industrial applications. Its advanced features, such as temperature control, configurable inputs and outputs, and communication capabilities, make it an ideal solution for managing refrigeration systems. By providing precise temperature control and optimization, the EWCM 900 S helps reduce energy consumption, increase food safety, and extend equipment lifespan.

The EWCM 900/S is packed with dedicated algorithms tailored for complex refrigeration setups. Its primary operational duties include: Compressor Management

The Eliwell EWCM 900 S is a sophisticated refrigeration controller that offers precise temperature control, advanced defrost management, and alarm functions. Its user-friendly interface and Modbus communication capabilities make it easy to install, program, and integrate with other building management systems. By providing improved temperature control, increased energy efficiency, and enhanced reliability, the Eliwell EWCM 900 S is an ideal choice for refrigeration professionals looking to optimize their commercial refrigeration systems.

Reliable, easy to program, universal power supply, strong relay outputs, IP65 front panel. Cons: No native internet connectivity (requires gateway), display shows codes (not text).

: Two levels of access—Operating ("oPr") and Configuration ("CnF")—secured by passwords. Market Availability & Pricing

The front panel consists of a high-visibility LED display alongside functional icons that indicate the real-time status of compressors, fans, defrost cycles, and active alarms. The tactile buttons allow field technicians to quickly check pressures, view runtimes, and acknowledge active faults. Parameter Structure

: Pre-programmed with conversion charts for common refrigerants like R22, R134A, R404A, R502, R407, and R507 Protection Systems Diagnostic Mode

Defrost cycles are critical for efficiency. The EWCM 900 s offers multiple defrost options:

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

Native RS-485 serial port supporting Eliwell and standard Modbus RTU Key Capabilities and Control Logic Multi-Compressor Staging and Sizing

: Programmable for 4–20 mA pressure transducers or NTC temperature probes.

: Provides used and new units with optional testing and refurbishing services. New Eliwell EWCM 900/S - HOS BV

0–10V or PWM outputs to modulate inverter-driven compressors or variable-speed fan motors. Core Operational Functions

The Eliwell EWCM 900 S offers a range of advanced features that make it an ideal choice for commercial refrigeration applications. Some of the key features of the controller include:

By analyzing compressor runtime and temperature trends, the controller can anticipate errors, adjust defrost intervals, and trigger early alarms for issues like low refrigerant or dirty condensers.