The Yanmar ViO25-6A compact excavator features a clear, analog-digital instrument cluster with warning lights for engine, hydraulic, and electrical systems. The cluster includes a multi-function display for operating hours, temperature, and fuel level, alongside dedicated indicators for critical faults.
Yanmar ViO25-6A Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | This red stop light on the Yanmar ViO25-6A illuminates when a critical fault occurs, such as low engine oil pressure or high coolant temperature, requiring immediate engine shutdown. | Stop the engine immediately, check the engine oil level and coolant, and consult the operator's manual. | |
| Master Caution | AMBER | The amber caution lamp on the ViO25-6A lights up to indicate a non-critical issue, such as a clogged air filter or low hydraulic oil level, that should be addressed soon to prevent damage. | Check the relevant system (e.g., air filter, hydraulic oil) and service as needed before continued operation. | |
| Check Engine (MIL) | AMBER | On the Yanmar ViO25-6A, the check engine light indicates an engine management system fault, such as a sensor failure or emission control issue, and may coincide with reduced power. | Have the engine diagnosed by a Yanmar dealer; if flashing, reduce load and stop the engine. | |
| Engine Oil Pressure | RED | A red oil can symbol on the ViO25-6A warns of dangerously low engine oil pressure, often due to low oil level or a faulty oil pump, risking severe engine damage. | Stop the engine immediately, check oil level and add oil if low; if the light persists, do not restart and contact service. | |
| Battery / Charging | RED | This red battery symbol on the Yanmar ViO25-6A indicates a charging system problem, such as a failed alternator or loose belt, which can cause battery discharge. | Check the alternator belt tension and connections; if the light stays on, have the charging system inspected. | |
| Coolant Temperature | RED | When the coolant temperature gauge on the ViO25-6A enters the red zone, the red warning light illuminates, signaling engine overheating from low coolant or a blocked radiator. | Stop the engine, let it cool, check coolant level and radiator fins; do not operate until the cause is resolved. | |
| Hydraulic System | AMBER | The amber hydraulic symbol on the Yanmar ViO25-6A warns of high hydraulic oil temperature or low oil level, which can degrade performance and cause pump wear. | Check hydraulic oil level and temperature; allow the system to cool and clean the oil cooler if necessary. | |
| Glow Plug / Preheat | AMBER | This amber coil icon on the ViO25-6A illuminates during preheating in cold starts; after it goes out, the engine is ready to start. | Wait for the light to turn off before cranking the engine; if it flashes, have the glow plug system checked. | |
| Low Fuel | AMBER | The low fuel warning on the ViO25-6A activates when the fuel level drops below about 10%, reminding the operator to refuel to avoid air ingestion. | Refuel the machine as soon as possible; do not run the tank dry to prevent priming issues. | |
| High Beam | BLUE | The blue high beam indicator on the Yanmar ViO25-6A confirms that the high beam headlights are active for improved visibility in dark conditions. | Dim the lights when approaching other vehicles or workers to avoid glare. | |
| Seat Belt | RED | A red seat belt reminder on the ViO25-6A appears when the operator is not buckled, promoting safety during operation. | Fasten the seat belt securely before moving the machine; the light should turn off. | |
| Swing / Slew Lock | GREEN | The green swing lock symbol on the ViO25-6A indicates that the upper structure slew is mechanically locked, preventing unintended rotation during transport or maintenance. | Deactivate the swing lock before operating the excavator; ensure the lock is engaged when towing or servicing. |
12 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheat
Common causes
- Low coolant level
- Blocked radiator or oil cooler
- Faulty thermostat or water pump
What to do
For the Yanmar ViO25-6A, shut down the engine and allow it to cool. Check the coolant reservoir and top off with a 50/50 mixture; clean the radiator fins from debris. If the problem persists, inspect the water pump and thermostat.
Low Engine Oil Pressure
Common causes
- Insufficient engine oil level
- Oil pump failure or worn bearings
- Clogged oil filter or passages
What to do
Immediately stop the engine on the ViO25-6A. Check the oil level using the dipstick; add SAE 10W-30 if low. If level is okay, do not restart – contact a Yanmar dealer for internal diagnosis.
Hydraulic System Overheating
Common causes
- Low hydraulic oil level
- Clogged hydraulic oil cooler
- Contaminated or wrong viscosity oil
What to do
On the ViO25-6A, allow the hydraulic system to cool and check the oil level in the tank; add Yanmar genuine hydraulic oil if low. Clean the oil cooler fins and ensure the cooling fan is working.
Battery Discharge
Common causes
- Faulty alternator or voltage regulator
- Loose or corroded battery terminals
- Parasitic drain or short circuit
What to do
On the ViO25-6A, check the alternator belt tension and battery connections. Tighten or clean terminals as needed. If the light stays on, have the charging system tested by a technician.
Fuel System Air Leak
Common causes
- Running out of fuel
- Loose fuel line connections
- Clogged fuel filter or water in fuel
What to do
If the ViO25-6A engine stumbles or loses power, check for air in the fuel system. Prime the system using the hand pump, drain the water separator, and replace the fuel filter if necessary.
Frequently Asked Questions
What does the red stop light mean on my Yanmar ViO25-6A?
The red master warning light indicates a critical fault, such as low oil pressure or high coolant temperature. You must stop the engine immediately and consult the manual before restarting.
How do I reset the service hour reminder on the ViO25-6A?
The hour meter display will show a service interval warning. To reset, turn the key to ON, press and hold the trip/reset button for 5 seconds until the display flashes, then release.
Why is the amber caution light staying on while I dig?
An amber caution on the ViO25-6A often signals a hydraulic oil temperature warning or a clogged air filter. Reduce the load and check the hydraulic oil level and air filter restriction indicator.
Can I operate the excavator with the check engine light on?
If the check engine light is steady and not flashing, you may continue operation but at reduced load. However, have the system diagnosed soon to avoid engine damage or emission failures.
What should I do if the glow plug light flashes?
A flashing glow plug indicator on the ViO25-6A indicates a preheat system fault. Inspect the glow plugs and relay; if the engine is hard to start in cold weather, see your Yanmar dealer.
How do I check the hydraulic oil level on the ViO25-6A?
Park the machine on level ground with the attachment fully lowered and the engine off. Locate the hydraulic tank sight glass; the oil level should be between the marks when the oil is cold.