EW Plus 961
EW Plus Series • Refrigeration Controller
Quick Info
Output Functions
Single relay controller with defrost by compressor stop
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 3 |
| Buttons | 4 |
| LED Indicators | Compressor, Defrost |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 100-240V AC |
| Frequency | 50/60Hz |
| Power Consumption | 3VA |
Sensor Inputs
| Probe Inputs | 1 |
| Probe Type | NTC 10K |
| Temp Range | -50 to 110°C |
| Accuracy | ±0.5°C |
Relay Outputs
| Relay Outputs | 1 |
| Relay Rating | 8A/250VAC (2HP) |
Physical
| Panel Size | 28.5x71 mm |
| Depth | 60 mm |
| IP Rating | IP65 (front) |
| Weight | 75 g |
Operating Conditions
| Operating Temp | -5 to 55°C |
| Storage Temp | -25 to 70°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| 1 | Power L | Input |
brown
|
| 2 | Power N | Input |
blue
|
| 3 | Probe (+) | Input |
red
|
| 4 | Probe (-) | Input |
white
|
| 5 | Digital Input | Input |
gray
|
| 6 | DI Common | Input |
gray
|
| 7 | Relay NO (Comp) | Output |
black
|
| 8 | Relay COM | Output |
black
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| SET | Setpoint | -50 to 110 | 4 °C | Temperature setpoint |
| Hy | Differential | 0.1 to 25.5 | 2 °C | Switching differential |
| LS | Low Limit | -50 to SET | -10 °C | Minimum setpoint |
| US | High Limit | SET to 110 | 20 °C | Maximum setpoint |
| Ot | Offset | -12 to 12 | 0 °C | Probe calibration |
| dOn | Comp ON Delay | 0 to 255 | 0 min | Startup delay |
| dOF | Min Off Time | 0 to 255 | 3 min | Minimum compressor off |
| dit | Defrost Interval | 0 to 24 | 8 hr | Time between defrosts |
| dEt | Defrost Duration | 0 to 99 | 15 min | Defrost time by comp stop |
Error Codes
Solution: Check probe wiring
Solution: Check refrigeration system
Solution: Check setpoint
Solution: Normal operation
Frequently Asked Questions
Defrost occurs by stopping compressor, allowing natural warming
Configure for door switch, night setback, or remote defrost trigger
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Eliwell
Country: Italy
Parent: Schneider Electric