IR33+
IR33 Plus Series • Refrigeration Controller
Quick Info
Output Functions
Enhanced universal refrigeration controller with NFC programming
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 4 |
| Buttons | 4 |
| LED Indicators | Comp, Defrost, Fan, Alarm, NFC |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 100-240V AC |
| Frequency | 50/60Hz |
| Power Consumption | 4VA |
Sensor Inputs
| Probe Inputs | 3 |
| Probe Type | NTC 10K / PTC / PT1000 |
| Temp Range | -50 to 150°C |
| Accuracy | ±0.3°C |
Relay Outputs
| Relay Outputs | 4 |
| Relay Rating | 8A/250VAC (SPDT) |
Physical
| Panel Size | 71x29 mm |
| Depth | 62 mm |
| IP Rating | IP65 (front) |
| Weight | 95 g |
Operating Conditions
| Operating Temp | -10 to 60°C |
| Storage Temp | -25 to 70°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| G | Earth | Input |
green/yellow
|
| 1 | Power L | Input |
brown
|
| 2 | Power N | Input |
blue
|
| B1 | Probe 1 (Room) | Input |
red/white
|
| B2 | Probe 2 (Evap) | Input |
red/white
|
| B3 | Probe 3 (Aux) | Input |
red/white
|
| DI1 | Digital Input | Input |
gray
|
| NO1 | Relay 1 (Comp) | Output |
black
|
| NO2 | Relay 2 (Defrost) | Output |
black
|
| NO3 | Relay 3 (Fan) | Output |
black
|
| NO4 | Relay 4 (Aux) | Output |
black
|
| +/- | 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 | Setpoint | -50 to 150 | 5 °C | Temperature setpoint |
| rd | Differential | 0.1 to 25.5 | 2 °C | Control band |
| c0 | Compressor Delay | 0 to 15 | 3 min | Restart delay |
| c1 | Min On Time | 0 to 15 | 0 min | Minimum runtime |
| d0 | Defrost Type | 0-4 | 1 | 0=Off, 1=Electric, 2=Gas, 3=Off-cycle, 4=EEV |
| d1 | Defrost End | -50 to 50 | 8 °C | Termination temp |
| d3 | Defrost Interval | 0 to 99 | 8 h | Hours between defrosts |
| d4 | Max Defrost | 1 to 180 | 30 min | Maximum duration |
| F0 | Fan Mode | 0-3 | 1 | 0=Off, 1=On, 2=With comp, 3=Continuous |
| F2 | Fan Delay | 0 to 15 | 2 min | Post-defrost delay |
| Pn | Probe Type | 0-4 | 0 | 0=NTC, 1=PTC, 2=PT100, 3=PT500, 4=PT1000 |
Error Codes
Solution: Check room sensor
Solution: Check evap sensor
Solution: Check aux sensor
Solution: Check refrigeration
Solution: Check setpoint
Solution: Check heater
Frequently Asked Questions
Use Carel APPLICA app to configure via smartphone NFC
Yes, pin-compatible replacement with enhanced features
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Carel
Country: Italy