XR72CX
XR Series • Refrigeration Controller
Quick Info
Output Functions
Controller for parallel compressor rack systems with RS485
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 4 |
| Buttons | 5 |
| LED Indicators | Comp1, Comp2, Comp3, Comp4, 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 10K / 4-20mA |
| Temp Range | -50 to 150°C |
| Accuracy | ±0.3°C |
Relay Outputs
| Relay Outputs | 6 |
| Relay Rating | 8A/250VAC |
Physical
| Panel Size | 71x29 mm |
| Depth | 70 mm |
| IP Rating | IP65 (front) |
| Weight | 150 g |
Operating Conditions
| Operating Temp | -10 to 55°C |
| Storage Temp | -25 to 70°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| Pb1 | Suction Pressure | Input |
4-20mA
|
| Pb2 | Discharge Pressure | Input |
4-20mA
|
| Pb3 | Temperature | Input |
NTC
|
| R1 | Compressor 1 | Output |
black
|
| R2 | Compressor 2 | Output |
black
|
| R3 | Compressor 3 | Output |
black
|
| R4 | Compressor 4 | Output |
black
|
| R5 | Condenser Fan | Output |
black
|
| R6 | Alarm | Output |
red
|
| A/B | RS485 | Comm |
yellow/green
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| SP | Suction Pressure SP | -1.0 to 30 | 2.5 bar | Suction pressure setpoint |
| dF | Differential | 0.1 to 5.0 | 0.5 bar | Switching band |
| St1 | Stage 1 Offset | 0 to 2.0 | 0 bar | First stage start |
| St2 | Stage 2 Offset | 0 to 2.0 | 0.3 bar | Second stage start |
| St3 | Stage 3 Offset | 0 to 2.0 | 0.6 bar | Third stage start |
| St4 | Stage 4 Offset | 0 to 2.0 | 0.9 bar | Fourth stage start |
| CdL | Cycle Delay | 0 to 30 | 3 min | Min time between starts |
| ROt | Rotation Enable | 0-1 | 1 | 0=Off, 1=Lead-lag rotation |
| Add | Modbus Address | 1 to 247 | 1 | RS485 address |
Error Codes
Solution: Check refrigerant charge
Solution: Check condenser
Solution: Check 4-20mA transducer
Solution: Check compressor thermal
Frequently Asked Questions
Automatically alternates which compressor starts first to equalize runtime
Yes, can control VFD compressor as lead unit
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Dixell
Country: Italy
Parent: Emerson Climate Technologies