The Komatsu PC210 is a versatile hydraulic excavator widely used in earthmoving and construction applications. Its instrument cluster is designed to provide operators with real-time feedback on critical systems to ensure safe and efficient operation.
Komatsu PC210 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A serious malfunction or fault has occurred on the PC210, such as a critical engine or hydraulic failure. | Safely stop the machine immediately and investigate the warning source on the monitor. | |
| Master Caution | AMBER | A non-critical but important issue has been detected, like low fluid levels or minor electrical faults. | Review the monitor for details and address the caution before resuming heavy work. | |
| Check Engine (MIL) | AMBER | The engine management system has identified an issue affecting performance or emissions on the PC210. | Check for error codes on the display and consult service if the light remains on. | |
| Engine Oil Pressure | RED | The engine oil pressure has dropped below safe levels, risking severe damage. | Shut off the engine immediately and inspect oil level and leaks. | |
| Battery / Charging | RED | The charging system is not maintaining battery voltage, possibly due to alternator or wiring issues. | Stop operation and check battery connections and alternator function. | |
| Coolant Temperature | RED | The engine coolant temperature is excessively high, risking overheating in the PC210. | Turn off the engine and allow it to cool; check coolant level and radiator. | |
| Hydraulic System | AMBER | A hydraulic system fault has been detected, possibly affecting boom or arm movement. | Inspect hydraulic fluid level and look for leaks; avoid heavy digging until resolved. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or temperature is outside normal range, which can impact performance. | Check hydraulic oil tank and top up if necessary; monitor for persistent warnings. | |
| Low Fuel | AMBER | The fuel tank level is low and the PC210 will soon require refueling to avoid shutdown. | Plan to refuel at the next safe opportunity. | |
| DEF / AdBlue | AMBER | The DEF (AdBlue) tank is low or there is a problem with the SCR system. | Refill the DEF tank or check for contamination; machine power may be limited if ignored. | |
| DPF / Regeneration | AMBER | The diesel particulate filter requires regeneration due to soot buildup. | Initiate parked regeneration following the monitor instructions to restore filter function. | |
| Water in Fuel | AMBER | Water has been detected in the fuel system, which can cause engine issues. | Drain the water separator promptly to prevent injector damage. | |
| Fuel Filter / Water Separator | AMBER | The fuel filter is clogged or the water separator needs draining. | Replace the fuel filter or drain water separator as soon as possible. | |
| Air Filter | AMBER | The air filter is restricted, reducing engine efficiency on the PC210. | Inspect and clean or replace the air filter element. | |
| Engine Oil Temperature | RED | Engine oil temperature is above safe limits, risking engine wear. | Shut down the engine and allow it to cool; check oil level and cooling system. | |
| Swing / Slew Lock | AMBER | The swing lock is engaged, preventing the upper structure from rotating. | Disengage the swing lock before attempting to rotate the house. | |
| Work Lights | BLUE | Work lights are currently switched on for improved visibility. | No action needed unless lights are not required. | |
| Beacon / Rotating Light | BLUE | The safety beacon is activated to alert others of machine operation. | No action required unless beacon use is not needed. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on engine hours logged on the PC210. | Arrange for regular service as indicated by the maintenance schedule. | |
| Parking Brake | RED | The parking brake is engaged, locking the travel motors. | Release the parking brake before moving the machine. | |
| Seat Belt | AMBER | The operator seat belt is not fastened, which is a safety requirement. | Fasten the seat belt before operating the excavator. | |
| High Exhaust Temp (HEST) | AMBER | Exhaust temperature is high, often during active DPF regeneration. | Allow regeneration to complete; avoid working near flammable materials. | |
| Door Open | AMBER | The cab or engine compartment door is not securely closed. | Ensure all doors are properly latched before operation. |
23 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure
Common causes
- Insufficient engine oil level
- Oil pump failure
- Oil filter blockage
What to do
Immediately shut down the engine and check the oil level and filter; if oil is sufficient, contact Komatsu service to inspect the lubrication system.
Coolant Temperature
Common causes
- Low coolant level
- Radiator or hose blockage
- Faulty thermostat
What to do
Turn off the PC210 and allow it to cool; inspect coolant level and radiator for obstructions, and top up as needed before restarting.
Hydraulic System
Common causes
- Low hydraulic oil
- Hydraulic leak
- Filter clogging
What to do
Check the hydraulic oil tank and hoses for leaks; refill oil if low and replace filters as per the service manual.
Battery / Charging
Common causes
- Loose or corroded battery terminals
- Alternator failure
- Broken belt
What to do
Inspect battery connections for corrosion or looseness, check the alternator and drive belt; replace faulty parts as necessary.
DEF / AdBlue
Common causes
- DEF tank empty
- Contaminated DEF fluid
- SCR system malfunction
What to do
Refill the DEF tank with clean fluid and check for contamination; if warnings persist, have the SCR system checked by a Komatsu technician.
Frequently Asked Questions
What should I do if the DPF regeneration light stays on?
If the DPF regeneration light remains on, initiate a parked regeneration following the instructions on the PC210 monitor; if it fails to clear, contact service.
Why does the hydraulic system warning appear after heavy digging?
The warning may indicate low hydraulic oil or overheating; check the reservoir and allow the system to cool before resuming work.
Can I keep operating if the DEF warning light is amber?
You should refill the DEF tank soon; continued operation with low DEF may result in reduced engine power or shutdown on the PC210.
How do I reset the service/hour meter light?
After completing scheduled maintenance, use the monitor interface to reset the hour meter reminder according to the operator’s manual.
What does the swing lock warning mean?
It indicates that the swing lock is engaged; release the lock before attempting to rotate the upper structure.