EKC 302
EKC Series • Refrigeration Controller
Quick Info
Output Functions
Advanced controller for multiple evaporator systems
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 4 |
| Buttons | 4 |
| LED Indicators | Comp 1, Comp 2, Defrost, Fan, Alarm |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 100-240V AC |
| Frequency | 50/60Hz |
| Power Consumption | 6VA |
Sensor Inputs
| Probe Inputs | 3 |
| Probe Type | NTC/PTC/PT1000 |
| Temp Range | -60 to 150°C |
| Accuracy | ±0.3°C |
Relay Outputs
| Relay Outputs | 5 |
| Relay Rating | 8A/250VAC |
Physical
| Panel Size | 71.5x28.5 mm |
| Depth | 65 mm |
| IP Rating | IP65 (front) |
| Weight | 140 g |
Operating Conditions
| Operating Temp | -25 to 55°C |
| Storage Temp | -40 to 70°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| S1 | Room Sensor | Input |
red/white
|
| S2 | Evap Sensor | Input |
red/white
|
| S3 | Aux Sensor | Input |
red/white
|
| DI1 | Digital Input 1 | Input |
gray
|
| DI2 | Digital Input 2 | Input |
gray
|
| K1 | Relay 1 (Comp 1) | Output |
black
|
| K2 | Relay 2 (Comp 2) | Output |
black
|
| K3 | Relay 3 (Defrost) | Output |
orange
|
| K4 | Relay 4 (Fan) | Output |
green
|
| K5 | Relay 5 (Alarm) | Output |
red
|
| A | RS485 A | Comm |
blue
|
| B | RS485 B | Comm |
yellow
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| r01 | Setpoint | -60 to 150 | 0 °C | Main setpoint |
| r02 | Differential | 0.1 to 20 | 2 °C | Stage 1 diff |
| r03 | Stage 2 Diff | 0.1 to 20 | 4 °C | Stage 2 differential |
| c01 | Comp Delay | 0 to 30 | 0 min | Startup delay |
| c02 | Min Off | 0 to 30 | 3 min | Minimum off time |
| c03 | Stage Delay | 0 to 30 | 5 min | Delay between stages |
| c04 | Rotation | 0=No, 1=Yes | 1 | Compressor rotation |
| d01 | Defrost Type | 0-3 | 1 | Defrost method |
| d02 | Defrost End | 0 to 25 | 8 °C | Termination temp |
| d03 | Max Defrost | 0 to 180 | 30 min | Maximum duration |
| d04 | Defrost Interval | 0 to 48 | 8 hr | Time between |
Error Codes
Solution: Check S1 sensor
Solution: Check S2 sensor
Solution: Check S3 sensor
Solution: Check system
Solution: Check condenser
Solution: Check charge
Frequently Asked Questions
Set c04=1 to rotate first-on compressor each cycle for equal wear
Hold both arrow buttons to access diagnostics menu
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Danfoss
Country: Denmark