Defrost cycles are critical for efficiency. The EWCM 900 s offers multiple defrost options:
The front panel is divided into two sections (Compressor and Fan). A single PRG button gives access to configuration folders and parameters. Programming is often protected by a to prevent unauthorized tampering. The HRS button lets you view the total runtime hours of a selected compressor, and you can reset this counter after a service. The MAINT button places a specific compressor "On Maintenance," taking it offline while the rest of the rack continues to run, which is useful for service without shutting down the whole plant. The MUTE button temporarily silences a buzzer during an alarm condition.
Physically, the EWCM 900/S is built to withstand demanding industrial environments. With dimensions of 72x144mm and a depth of 120mm, it comes in a durable black ABS plastic housing and is intended for flush panel mounting with an IP65 front panel rating, which protects against dust and water jets. The front panel displays key data on two separate 3-digit screens for the compressor and fan sections.
One of the standout features of the EWCM 900 S is its focus on energy management. In today’s economic and environmental climate, reducing energy consumption is a top priority. This controller utilizes advanced algorithms to ensure that compressors operate at their peak efficiency. By balancing the workload across multiple units and implementing smart start/stop sequences, the EWCM 900 S minimizes wear and tear while significantly lowering electricity costs. Its integrated floating head pressure control further enhances efficiency by adjusting the system based on ambient conditions. eliwell ewcm 900 s
What and compressor configuration (number of stages/inverters) are you using? Are you facing a specific alarm code or programming issue ?
remains an essential asset for facility managers, field technicians, and system integrators looking to maintain older pack systems or procure reliable, robust parts. Core Specifications & Architecture The hardware architecture of the EWCM 900/S
Eliwell EWCM 900/S is a robust, industrial-grade controller designed for managing machine rooms in refrigeration systems. It is highly regarded for its ability to handle complex setups, including single-unit multistep compressors and condenser fans, while maintaining operational stability. Eliwell France Key Strengths & Features Versatile Compressor Management Defrost cycles are critical for efficiency
: Typically 230V AC (with 24V options available). Safety & Diagnostic Functions 🚨 Eliwell EWCM 900/S
Define the proportional band ( Pb ) to dictate how aggressively the system responds to load changes. Step 3: Configure Safety and Alarm Thresholds (AL Menu) Protect the system from mechanical failure. Enter the AL menu.
Manages up to 4, 6, or more compressor stages depending on the specific model variation and sub-configurations. Programming is often protected by a to prevent
: Supports various compressor types, including standard, digital scroll, and inverter-driven compressors.
: It can control single units, multi-stage systems, or compressors of varying capacities. High Output Capacity : The unit features 11 relay outputs that can be configured for both compressors and fans. Intelligent Safety Systems Emergency Backup
Typically features inputs for ratiometric pressure transducers (0-5V) or current transducers (4-20mA) to monitor suction and discharge pressures. It also supports NTC/PT1000 temperature probes for temperature-based regulation or ambient tracking.