Sullair Supervisor / WS Controller
The Supervisor is Sullair's current-generation display and is largely backward compatible with WS-era sensor wiring. Watch for 'Change Separator' triggering falsely on cold start when Sullube is thick — recheck after 30 min of run time.
Manufacturer
Sullair
Display
Supervisor: 5.7" color TFT with membrane keys; WS Signal: 4-line 20-char monochrome LCD.
Years produced
Supervisor ~2015 – present; WS series (WS Advanced, WS Signal) 2005–2015.
Power supply
24 VDC control from onboard PSU (120/230 VAC input).
Ambient range
0 – 50 °C cabinet ambient.
Protection rating
IP54 front, IP20 rear.
Relay outputs
Configurable — main / star / delta / blowdown / dryer / common alarm / run.
Replaces
WS Advanced, Sullair Watch Dog
Used on
- Sullair LS-Series LS-10 through LS-25S
- Sullair ShopTek ST409–ST1509
- Sullair TS-Series (two-stage)
- Sullair 1100/1500/1800 series
- Sullair Turbowall (Vantage) large-frame
On AirCompDX
Features
- Adjustable load/unload, modulation, or dual-control mode
- Sequencing up to 4 units native (external panel for more)
- Sullair AirLinx remote monitoring compatible
- Real-time trending and event log (SD card)
- Password-protected service menu
Interfaces
- Ethernet Modbus TCP
- RS-485 Modbus RTU
- USB / SD firmware update
- 24 VDC I/O for remote start/stop and common alarm
- Sullair AirLinx cloud gateway (add-on)
Sensor inputs
- Sump / airend discharge temp
- Package discharge pressure
- Sump pressure
- Air filter ΔP (option)
- Fluid filter ΔP (option)
- Separator ΔP
Common fault codes
First checks
- Check fluid level (Sullube or AWF)
- Clean cooler and check thermal valve
- Verify fan motor operation
First checks
- Replace air filter
- Check inlet valve for restriction
- Reset service counter
First checks
- Replace fluid filter
- Sample fluid for contamination
First checks
- Replace separator element
- Change fluid and filter as full service
- Verify scavenge line and orifice clean
First checks
- Check unload setpoint vs system demand
- Verify inlet valve closes
- Confirm blowdown works and MPCV holds
First checks
- Verify inlet valve opens
- Check for major leak in airend-to-separator loop
- Verify blowdown closed
First checks
- Reset overload, verify class 20 or 30 setting
- Check phase voltage & balance
- Look for airend drag
First checks
- Free fan; check bearings
- Verify fan contactor & OL setting
First checks
- Release local E-stop and check remote loop
- Verify safety chain jumper if not used
- Confirm 24 V on E-stop input
First checks
- Verify all 3 phases at disconnect
- Check phase monitor relay
- Swap any two phases for rotation
First checks
- Check wiring & polarity
- Test sensor against reference
- Replace sensor if drift confirmed
First checks
- Perform the specific service kit
- Reset only the completed timer
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Wiring notes
- 24 VDC control, 120 VAC contactor coils typical on North American units
- Sullair Sullube fluid required for LS/TS — do not substitute mineral oil without derating
- Star-delta starter timing set at controller; verify open transition < 100 ms on retrofit
- Sensor cabling shielded and grounded at controller end only
Terminal & connector map
Pinouts distilled from OEM wiring diagrams. Exact silk-screen labels and pin numbering vary by hardware revision and package options — always confirm against the machine’s as-built wiring diagram before landing a wire.
Connectors to the controller
- TB1 – 24 VDC control power in (top-left screw terminals)
- TB2 – RS-485 comms (AirLinx sequencer / Modbus RTU)
- TB3 – RTD/thermistor block for airend & motor thermistors
- TB4 – 4–20 mA transducer block (line pressure, sump, sep ΔP)
- TB5 – digital I/O to starter (main / star / delta / load solenoid / remote)
- J1 – ribbon cable to keypad/display assembly (fragile — support before removing)
TB1 – PowerControl power
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| 1 | +24 VDC | 24 VDC | Control transformer + |
| 2 | 0 V | 24 VDC ret. | Control transformer − |
| PE | PE | PE | Cabinet ground |
TB3 – TemperatureRTD / thermistor
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| 1 / 2 / 3 | Airend discharge RTD | PT100 3-wire | Airend discharge sensor |
| 4 / 5 | Motor winding thermistor | PTC | Motor PTC string |
| 6 / 7 | Sump temp (option) | PT100 2-wire | Sump temp sensor |
TB4 – Pressure4–20 mA transducers
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| P1 +/− | Package discharge pressure | 4–20 mA | P1 line transducer |
| P2 +/− | Sump pressure | 4–20 mA | P2 sump transducer |
| ΔP +/− | Separator ΔP | 4–20 mA | Sep ΔP transducer |
TB5 – Digital I/OStarter / remote / alarm
| Pin | Signal | Type | Connects to |
|---|---|---|---|
| 1M | Main contactor coil | 24 VDC out | 1M contactor |
| 1S | Star contactor coil (WYD) | 24 VDC out | 1S contactor |
| 1D | Delta contactor coil (WYD) | 24 VDC out | 1D contactor |
| LS | Load solenoid | 24 VDC out | Load / blowdown solenoid |
| RS | Remote start (dry) | dry contact in | Customer PLC |
| CT | Common trouble | relay out | Master alarm |
Known issues & field notes
- 'Change Separator' false alarm on cold Sullube — recheck after 30 min of run time
- AirLinx cellular gateway loses 3G; replace with LTE variant
- Supervisor screen dimming after firmware update — recalibrate backlight in service
Retrofit notes
WS → Supervisor retrofit is a common upgrade path on LS-16 through LS-25S. Sensor loom compatible on most builds; verify motor thermistor wiring class.
Manuals & literature
Your manuals
Sign in to upload and pin your own PDF manuals to this controller.