ELGi Neuron II
Feature and menu detail follow the publicly published Neuron II user manual. Codes and setpoints vary by firmware version and package — always confirm against the panel and the machine manual.
- ELGi EN series
- ELGi E series screw packages
- Various ELGi OEM builds
- Pre-programmed compressor logic: load/unload, auto stop-start, continuous run
- Pressure schedule (dual pressure band) and weekly scheduler
- Fault report, day report, service-time and cumulative-hour views
- Sensor calibration and relay test menus under a service password
- VFD page on variable-speed packages
- Local / remote / DCS mode selection and auto-restart flag on the main screen
- RS-485 Modbus RTU
- Digital I/O
- Remote start/stop
- Sequencing / load-share inputs
- Discharge pressure transducer
- Airend discharge RTD
- Optional sump pressure and dryer inputs
- Check fluid level at running temperature
- Clean the cooler face and check cabinet airflow
- Verify the thermostatic valve is stroking
- Ohm the RTD and compare against a PT100 table
- Compare the overload setting with the motor nameplate FLA
- Read running amps on all three phases for imbalance
- Check Y-Δ transition timing
- Look for a restricted separator raising sump pressure
- Verify all three phases at the disconnect
- Check rotation against the airend arrow
- Swap two line phases if rotation is wrong
- Test the phase monitor relay
- Check the load solenoid and blowdown for a stuck-loaded condition
- Calibrate the transducer against a known gauge in the Neuron calibration menu
- Inspect the minimum pressure valve
- Inspect the plug for water and corrosion
- Measure loop current: below 3.8 mA or above 20.5 mA is a wiring or sensor fault
- Substitute a known-good sensor before recalibrating
- Perform the service that is actually due
- Reset only that counter in the maintenance menu
- Confirm intervals match the fluid grade in use
- Release and twist out the E-stop
- Check the remote safety loop or jumper
- Confirm control voltage at the safety input
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Pin-level resistance and signal values for the sensor types this controller uses. Works offline. De-energise the panel and lift one lead before ohming any element.
- Control supply comes from the package transformer — verify the tag voltage before probing the board
- RS-485 Modbus pair daisy-chained, 120 Ω termination at the two physical ends only
- Shielded sensor cable bonded at the panel end only
- Remote start/stop is a volt-free contact input — do not apply external voltage to it
- Menu structure and fault wording differ between Neuron II firmware versions — an older manual may not match the panel
- Transducer calibration drifts after a wet-air event; recalibrate against a gauge rather than replacing parts first
Operator settings are open; calibration, relay test and factory pages sit behind a service password documented in the machine's own manual or issued by the ELGi distributor. Passwords can be changed from the operator menu on many builds.
Services & parts portal — Neuron controller docs are also carried by authorized dealers
Sign in to upload and pin your own PDF manuals to this controller.