Doosan/Airman Portable Controller
Doosan Portable Power is now a Bobcat brand. Engine ECU faults dominate service calls — always start by reading the SPN/FMI, not the compressor controller code.
Manufacturer
Doosan Portable Power (now Bobcat)
Display
Backlit segmented LCD with icon indicators + 4 keys.
Years produced
~2005 – present, multiple engine ECU generations.
Power supply
12 or 24 VDC from machine electrical.
Ambient range
-20 – 55 °C (outdoor equipment).
Protection rating
IP65 front (weather-sealed for towable use).
Relay outputs
Engine start relay, glow plug, fuel solenoid, service light, low-fuel shutdown.
Used on
- Doosan P185 / P250 / P425 / P600 towable air compressors
- Airman PDS portable compressors (Japan/Asia branding)
Features
- Engine + airend integrated monitoring
- Cold-start glow plug sequencing
- Fuel level shutdown to prevent engine airbind
- Service hour reminders per component
Interfaces
- J1939 CAN (engine ECU)
- RS-232 service port
- Telematics module (option — cellular)
Sensor inputs
- Airend discharge temp
- Package discharge pressure
- Engine oil pressure & temp (via J1939)
- Fuel level
Common fault codes
First checks
- Read SPN/FMI on display
- Cross-reference in engine manufacturer manual (Kubota / Cummins / Doosan)
- Check DEF level on Tier 4 Final units
First checks
- Cooler cleanliness (very common on jobsite — dust)
- Fluid level & thermostat
- Ambient too high?
First checks
- Refuel
- Verify float sender
- Check for fuel leaks / theft
First checks
- Service valve closed downstream?
- Regulator adjustment
- Verify pressure sensor
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Wiring notes
- Automotive-style Deutsch connectors — always regrease on reassembly
- J1939 backbone requires 120 Ω termination at both ends
Known issues & field notes
- Display fades in direct sun after ~5 years — replaceable assembly
- DEF freeze on Tier 4 machines below -10 °C — heated tank required for winter use
Manuals & literature
Doosan Portable Power — manuals index
Technical manuals (now under Bobcat)
Your manuals
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