The Claas ARION 400 tractor features a digital instrument cluster that displays critical warnings and status indicators for safe and efficient operation. Understanding these symbols helps operators rapidly diagnose issues and prevent downtime in the field.
Claas ARION 400 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system failure has occurred that demands an immediate engine shutdown on your ARION 400. | Stop the tractor safely and engage the parking brake; check the display for the specific fault code. | |
| Master Caution | AMBER | A non-critical issue is detected somewhere in the tractor's systems; the ARION 400 will continue to operate but you should review the message. | Press the info button on the joystick to view the fault details and address as needed. | |
| Check Engine (MIL) | AMBER | The engine control unit has detected an emission-related or performance issue in your ARION 400's DPS or FPT engine. | Contact your Claas dealer for diagnostic testing; continued operation may reduce power. | |
| Engine Oil Pressure | RED | Engine oil pressure is too low, which can cause severe engine damage in the ARION 400's 4-cylinder turbo engine. | Stop the engine immediately and check the oil level; do not restart until the issue is resolved. | |
| Battery / Charging | RED | The alternator is not charging the battery properly; your ARION 400 will soon lose electrical power. | Stop the engine and check the alternator belt and connections; have the charging system tested. | |
| Coolant Temperature | RED | Engine coolant temperature has exceeded safe limits; the ARION 400 may overheat if you continue. | Idle the engine and check the radiator for blockages; shut down if temperature does not drop. | |
| Transmission Temp | AMBER | The ARION 400's CMATIC or HEXASHIFT transmission fluid is too hot; performance may be limited. | Reduce load or shift to a lower gear; allow the transmission to cool before resuming heavy work. | |
| Brake System | RED | A fault in the service brake system has been detected, reducing braking effectiveness on the ARION 400. | Stop the tractor and check brake fluid level; do not operate until repaired. | |
| Parking Brake | AMBER | The parking brake is engaged; release it before moving the ARION 400 to avoid driveline damage. | Disengage the parking brake lever located on the left side of the cab. | |
| Glow Plug / Preheat | AMBER | The glow plugs are preheating the engine for cold starts; wait until the indicator turns off on your ARION 400's cluster. | Turn the key to the preheat position and wait for the light to go out before cranking. | |
| DPF / Regeneration | AMBER | The diesel particulate filter is loading and needs regeneration; your ARION 400 will initiate an active regen unless interrupted. | If flashing, park the tractor in a safe area and engage park brake to allow regen to complete. | |
| DEF / AdBlue | AMBER | AdBlue level is low or quality is poor; the ARION 400's SCR system will reduce power if ignored. | Refill AdBlue using a clean nozzle; only use fluid meeting ISO 22241 standard. | |
| Water in Fuel | AMBER | Water has been detected in the fuel filter/water separator; this can damage the ARION 400's common-rail injection system. | Drain the water separator bowl located near the fuel tank; check for fuel contamination. | |
| Low Fuel | AMBER | Fuel level is low; the ARION 400 has approximately 10% of the 145-liter tank remaining. | Refuel as soon as possible to avoid air entering the fuel system. | |
| High Beam | BLUE | High beam headlights are activated; dim them for oncoming traffic when operating the ARION 400 on roads. | Push the turn signal stalk forward to switch to low beam. | |
| Hydraulic System | RED | The main hydraulic system pressure is low or there is a system fault; implement control may be lost. | Stop the tractor and check hydraulic oil level; inspect hoses for leaks. | |
| Fasten Seat Belt | RED | The operator seat belt is not fastened; the ARION 400 will sound an alarm if driven. | Fasten the seat belt immediately before operating the tractor. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is automatically limited to protect the ARION 400's drivetrain or emissions system. | Reduce load and drive to a safe location; have the tractor diagnosed by a Claas technician. | |
| PTO Engaged | AMBER | The rear power take-off is engaged; be cautious of rotating implements attached to the ARION 400. | Disengage the PTO when not in use to prevent accidental driveline rotation. | |
| Differential Lock | AMBER | The rear differential is locked for improved traction; do not turn sharply on hard surfaces. | Disengage diff lock before making tight turns to avoid stress on the drive shaft. |
20 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Low coolant level
- Clogged radiator debris screens
- Faulty thermostat on the ARION 400
What to do
Stop the engine and let it cool; check coolant level in the recovery tank and clean the radiator screens; if recurrent, have the cooling system serviced by your Claas dealer.
Transmission Overheat
Common causes
- Continuous heavy PTO work at low speed
- Low transmission oil level
- Blocked oil cooler on the ARION 400's CVT
What to do
Reduce engine load and shift to a lower range; allow the transmission to idle for 5 minutes; check oil level and clean the cooler fins.
Brake Failure
Common causes
- Low brake fluid level
- Worn brake pads or discs
- Air in the brake lines (if equipped with air-assisted brakes)
What to do
Stop the tractor immediately using the parking brake; check brake fluid reservoir and top up; if pedal feels spongy, bleed the brakes or contact a service technician.
Engine Loss of Power
Common causes
- Clogged air filter
- Fuel system air leak
- DPF regeneration inhibited too long
What to do
Replace the air filter if the indicator shows restriction; check fuel lines for leaks; perform a stationary regeneration by parking the ARION 400 and pressing the regen switch.
Frequently Asked Questions
What does the yellow triangle with an exclamation mark mean on the ARION 400?
That's the Master Caution indicator; it means a non-critical fault has been logged. Press the info button on the right-hand side of your display to see the specific message.
Why does my ARION 400 show a red stop sign after starting?
The red stop sign is the Master Warning. It could be triggered by low oil pressure, high coolant temp, or a brake fault. Do not drive; check the central display for the cause.
Can I continue working if the AdBlue light comes on?
You can work for a short time, but engine power will be progressively limited. Refill AdBlue as soon as possible using a clean container to avoid shutdown.
How do I start a DPF regeneration on the ARION 400?
If the DPF light is flashing, park the tractor, engage the parking brake, and press the regeneration switch located near the steering column. The process takes about 20 minutes.
What should I do if the transmission temperature warning appears?
Reduce the load immediately by either lowering the implement speed or shifting to a lower gear. If the light stays on, stop the tractor and let the transmission idle for 10 minutes.
Why does my ARION 400 keep showing a low fuel warning even after refueling?
The fuel level sensor may be sticking. Try turning the ignition off and on. If the problem persists, have the sending unit checked by a Claas dealer.