Carel
µC3
µC Series • Refrigeration Controller
Quick Info
Type
Refrigeration
Application
Display Case
Probe Inputs
2
Relay Outputs
3
Panel Size
32x74 mm
Output Functions
R1
Compressor
R2
Defrost
R3
Fan
Compact controller with defrost and fan outputs
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 3 |
| Buttons | 4 |
| LED Indicators | Comp, Defrost, Fan |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 100-240V AC |
| Frequency | 50/60Hz |
| Power Consumption | 3VA |
Sensor Inputs
| Probe Inputs | 2 |
| Probe Type | NTC 10K |
| Temp Range | -50 to 90°C |
| Accuracy | ±0.5°C |
Relay Outputs
| Relay Outputs | 3 |
| Relay Rating | 8A/250VAC |
Physical
| Panel Size | 32x74 mm |
| Depth | 60 mm |
| IP Rating | IP65 (front) |
| Weight | 75 g |
Operating Conditions
| Operating Temp | -5 to 55°C |
| Storage Temp | -20 to 70°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| 1 | Power L | Input |
brown
|
| 2 | Power N | Input |
blue
|
| 3-4 | Probe 1 (Room) | Input |
red/white
|
| 5-6 | Probe 2 (Evap) | Input |
red/white
|
| 7-8 | Compressor | Output |
black
|
| 9-10 | Defrost | Output |
black
|
| 11-12 | Fan | 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 |
|---|---|---|---|---|
| SP | Setpoint | -50 to 90 | -5 °C | Temperature setpoint |
| dF | Differential | 0.1 to 20 | 2 °C | Control band |
| d0 | Defrost Type | 0-2 | 1 | 0=Off, 1=Electric, 2=Off-cycle |
| dI | Defrost Interval | 0 to 24 | 8 h | Hours between |
| dt | Defrost Time | 1 to 99 | 30 min | Max duration |
| dE | Defrost End | -50 to 50 | 8 °C | Termination temp |
| Fn | Fan Mode | 0-2 | 1 | 0=Off, 1=On, 2=With comp |
Error Codes
E1
Room probe error
Solution: Check probe 1
E2
Evap probe error
Solution: Check probe 2
Hi
High temp
Solution: Check system
dEF
Defrost timeout
Solution: Check heater
Frequently Asked Questions
µC3 has defrost and fan outputs, 2 probes
Press and hold DEF button for 5 seconds
Alternative Models (Cross Reference)
IR33S0ER00
Dixell XR20CX
Eliwell EW Plus 971
Manufacturer Information
Brand: Carel
Country: Italy