UCHILLER
µChiller Series • Refrigeration Controller
Quick Info
Output Functions
Compact chiller controller for small applications
Technical Specifications
Display & Interface
| Display Type | LED |
| Display Digits | 4 |
| Buttons | 4 |
| LED Indicators | Comp, Pump, Alarm |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 115-230V AC |
| Frequency | 50/60Hz |
| Power Consumption | 6VA |
Sensor Inputs
| Probe Inputs | 3 |
| Probe Type | NTC/PT1000 |
| Temp Range | -20 to 80°C |
| Accuracy | ±0.3°C |
Relay Outputs
| Relay Outputs | 3 |
| Relay Rating | 8A/250VAC |
Physical
| Panel Size | 71x29 mm |
| Depth | 65 mm |
| IP Rating | IP65 (front) |
| Weight | 140 g |
Operating Conditions
| Operating Temp | -10 to 50°C |
| Storage Temp | -20 to 60°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| B1 | Water Out | Input |
red/white
|
| B2 | Water In | Input |
red/white
|
| B3 | Ambient | Input |
red/white
|
| K1 | Compressor | Output |
black
|
| K2 | Pump | Output |
green
|
| K3 | Alarm | Output |
red
|
| AO | Fan 0-10V | Output |
orange
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| St | Setpoint | -10 to 35 | 7 °C | Water setpoint |
| rd | Differential | 0.5 to 10 | 3 °C | Control band |
| AL | Low Water Alarm | -20 to St | 2 °C | Low temp alarm |
| AH | High Water Alarm | St to 50 | 20 °C | High temp alarm |
| AP | Antifreeze | -10 to 10 | 4 °C | Antifreeze threshold |
| Pu | Pump Mode | 0=Cont, 1=Intlk | 1 | Pump operation |
| c5 | Min Off | 0 to 15 | 3 min | Compressor delay |
Error Codes
Solution: Check B1
Solution: Check B2
Solution: Check B3
Solution: Check water flow
Solution: Check glycol concentration
Solution: Check condenser
Solution: Check charge
Frequently Asked Questions
Configure AP parameter for glycol concentration
Set Pu=1 for pump interlock with compressor
Alternative Models (Cross Reference)
Manufacturer Information
Brand: Carel
Country: Italy