Kobelion controller (Kobe Steel)
Kobelco documentation is excellent but model-code driven — always pull the full serial-plate model string before ordering controller spares; pictograph revisions differ by market.
Manufacturer
Kobelco (Kobe Steel)
Display
Monochrome graphic LCD with pictograph icons and soft keys; Japanese/English toggle.
Years produced
~2005 – present on Kobelion AG / SG / XG screw series.
Power supply
24 VDC from internal supply; battery-backed clock.
Ambient range
0 – 45 °C.
Protection rating
IP54 panel front.
Relay outputs
Main/auxiliary contactors, purge solenoid, dryer output, alarm output.
Used on
- Kobelco Kobelion AG / SG oil-injected screws
- Kobelco Emeraude ALE oil-free (variant firmware)
Features
- P-Q control (pressure/capacity optimization modes)
- Load/unload plus suction-throttle hybrid control
- Maintenance timers with part-code display
- Energy monitor screen showing estimated power
Interfaces
- RS-485 Modbus RTU (option card)
- Dry contact remote control
- Optional Ethernet gateway
Sensor inputs
- Discharge air temperature (thermistor)
- Package pressure (transducer)
- Sump pressure
- Oil filter and separator differential switches
Fault code lookup
First checks
- Oil level and grade
- Oil cooler approach temperature
- Thermostatic element function
First checks
- Transducer zero at atmosphere
- Blow-off valve operation
- Inlet valve seating
First checks
- Current balance across phases
- Bearing drag at airend
- Reset after cool-down
First checks
- Replace filter and check oil analysis history
- Confirm switch wiring not chafed
First checks
- Replace separator element
- Check scavenge return line
- Verify no oil foaming
First checks
- Local and remote E-stop chain
- Door switches if fitted
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Sensor pin resistance & signal values
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.
Wiring notes
- Thermistor inputs are NOT interchangeable with PT100 — use the Kobelco-specified thermistor when replacing sensors
- Modbus option card must be terminated and addressed per the gateway manual
- Keep control wiring in the separate low-voltage duct — Kobelco cabinets are compact and noise coupling is common
Known issues & field notes
- English/Japanese language flag can revert after EEPROM faults — re-set in the maintenance menu
- Early Emeraude oil-free firmware had false separator-clog alarms in cold rooms; firmware update available through dealers
Maintenance menu code held by the servicing distributor.
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