Sigma Air Manager 3 (SAM 3)
A SAM 3 with properly tuned 3-D profiles routinely saves double-digit percentage energy vs cascade sequencing — the tuning session pays for itself.
Manufacturer
Kaeser
Display
Graphic monochrome LCD with keypad; web server pages via Ethernet.
Years produced
~2008 – 2019 master controller, superseded by SAM 4.0.
Power supply
100–240 VAC input, internal 24 VDC.
Ambient range
0 – 45 °C.
Protection rating
IP54 wall-mount enclosure.
Relay outputs
Backup control relay bank, alarm outputs, per-machine hardwired fallback.
Used on
- Kaeser multi-compressor rooms
- Mixed fleets with Sigma Control 1/2 slaves
Features
- 3-D control: sequencing optimized against specific-power curves
- Pressure-band scheduling with calendar
- Compressed-air cost tracking pages
- Email alarm notifications
Interfaces
- Ethernet (web server, email alarms)
- Kaeser bus to slaves
- Modbus TCP
- USB for updates
Sensor inputs
- System pressure transducer (4–20 mA)
- Optional flow meter input
- Optional dew point input
Fault code lookup
First checks
- Bus termination
- Slave in Remote mode
- Cable integrity
First checks
- Loop check
- Sense line open
- Compare to gauge
First checks
- Slaves alarmed or locked out
- New leak/load
- Sequencing profile limits
First checks
- Master diagnostics page
- Backup switch settings
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
- Kaeser bus is NOT generic Modbus wiring — follow the SAM bus topology diagram exactly
- Terminate at physical ends only
- Keep the header transducer on a dedicated, valved sense line
Known issues & field notes
- Web server requires legacy browser modes on modern PCs — use the service laptop image
- 3-D tuning defaults are conservative; an undertuned SAM leaves real energy on the table
Operator/administrator levels set at commissioning.
Manuals & literature
Kaeser — support portal
Manuals gated — request via local rep or parts portal
Your manuals
Sign in to upload and pin your own PDF manuals to this controller.