Carel
FCR3
FCR Series • HVAC Controller
Quick Info
Type
HVAC
Application
FCU
Probe Inputs
2
Relay Outputs
5
Communication
RS485 Modbus (optional)
Panel Size
86x86 wall mm
Output Functions
R1
Fan Low
R2
Fan Med
R3
Fan High
R4
Heat Valve
R5
Cool Valve
Fan coil unit controller with 3-speed fan
Technical Specifications
Display & Interface
| Display Type | LCD |
| Display Digits | 3 |
| Buttons | 5 |
| LED Indicators | Heat, Cool, 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 | 0 to 50°C |
| Accuracy | ±0.5°C |
Relay Outputs
| Relay Outputs | 5 |
| Relay Rating | 3A/250VAC |
Physical
| Panel Size | 86x86 wall mm |
| Depth | 35 mm |
| IP Rating | IP30 |
| Weight | 120 g |
Operating Conditions
| Operating Temp | 0 to 50°C |
| Storage Temp | -10 to 60°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| B1 | Room Temp | Input |
internal
|
| B2 | Remote Sensor | Input |
red/white
|
| FL | Fan Low | Output |
black
|
| FM | Fan Medium | Output |
black
|
| FH | Fan High | Output |
black
|
| VH | Heat Valve | Output |
orange
|
| VC | Cool Valve | Output |
blue
|
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 | 15 to 30 | 22 °C | Room temperature setpoint |
| dT | Differential | 0.5 to 3 | 1 °C | Control band |
| MD | Mode | 0-3 | 0 | 0=Auto, 1=Heat, 2=Cool, 3=Fan only |
| FS | Fan Speed | 0-3 | 0 | 0=Auto, 1=Low, 2=Med, 3=High |
| VS | Valve System | 0-1 | 0 | 0=2-pipe, 1=4-pipe |
| SL | Setpoint Low Limit | 10 to SP | 16 °C | Minimum setpoint |
| SH | Setpoint High Limit | SP to 35 | 28 °C | Maximum setpoint |
Error Codes
E1
Internal sensor error
Solution: Replace thermostat
E2
Remote sensor error
Solution: Check B2 wiring
Frequently Asked Questions
2-pipe has one valve for heat/cool, 4-pipe has separate valves
Fan speed increases as temp deviation increases
Alternative Models (Cross Reference)
PJFC0000S0
Honeywell T6373
Danfoss ERC 214
Manufacturer Information
Brand: Carel
Country: Italy