NxGen Controller
Common on 5–50 hp FS-Curtis rotary screws sold through industrial distribution in North America.
Manufacturer
FS-Curtis
Display
4.3-inch color LCD with 4-button navigation.
Years produced
~2015 – present.
Power supply
24 VDC, 4.3-inch color LCD.
Ambient range
0 – 46 °C.
Protection rating
IP54 front.
Relay outputs
Star/delta or VFD run enable, blowdown, dryer, alarm, common warning.
Used on
- FS-Curtis NxB / NxV rotary screws
- FS-Curtis SE-series
Features
- Weekly scheduler
- Service hour reminders
- Multi-unit sequencing (up to 4)
- Trend logging
Interfaces
- RS-485 Modbus RTU
- Ethernet (Modbus TCP option)
- USB (firmware/trend)
Sensor inputs
- Airend discharge temp
- Package discharge pressure
- Sump pressure
- Separator ΔP (option)
Common fault codes
First checks
- Cooler & fan
- Fluid level & thermostat
- Verify RTD
First checks
- Reset OL, measure currents
- Contactor mechanical
First checks
- Inlet valve
- Blowdown solenoid stuck open
First checks
- Wiring & shield
- Swap sensor to isolate
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Wiring notes
- Labeled terminal strip, 24 VDC I/O
- USB behind door — dust cover a must in shop environments
Two levels — User (open) and Service (default 0000 or 1234 on new units, changed at commissioning per distributor policy).
Manuals & literature
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