The Volvo CE S40 excavator features a modern instrument cluster designed to keep operators informed of all critical machine statuses. Its warning and indicator lights are tailored for heavy-duty excavation, ensuring safety and optimal performance. Understanding these symbols is key to minimizing downtime and preventing costly repairs.
Volvo CE S40 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A severe system fault has been detected on the S40, requiring urgent intervention to prevent machine damage. | Shut down the engine and investigate the fault using the diagnostic display. | |
| Master Caution | AMBER | The S40 has detected a non-critical fault that could affect function if ignored. | Review the instrument panel for additional warnings and address the issue soon. | |
| Check Engine (MIL) | AMBER | An engine management fault has been detected by the S40’s ECU, potentially affecting performance. | Schedule inspection with service personnel and avoid heavy loads. | |
| Engine Oil Pressure | RED | The S40’s engine oil pressure has dropped below safe levels, risking severe engine damage. | Shut down the engine immediately and check oil level and leaks. | |
| Battery / Charging | RED | The charging system is not maintaining voltage in the S40’s battery, risking electrical failure. | Stop operation and inspect the alternator and battery connections. | |
| Coolant Temperature | RED | The engine coolant in the S40 has reached a dangerously high temperature. | Stop the machine and allow the engine to cool before checking coolant levels. | |
| Hydraulic System | AMBER | A hydraulic system fault or abnormal pressure has been sensed in the S40. | Inspect for leaks or filter blockages and schedule maintenance. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or temperature is outside the recommended range for the S40. | Check oil level and quality; top up or replace if needed. | |
| Low Fuel | AMBER | The S40’s fuel tank is nearing empty, risking engine shutdown during operation. | Refuel at the next opportunity to avoid stalling. | |
| DPF / Regeneration | AMBER | The diesel particulate filter requires regeneration to maintain emissions compliance in the S40. | Initiate or complete the regeneration process as prompted in the display. | |
| DEF / AdBlue | AMBER | The S40’s DEF tank is low or there is a system issue affecting emissions control. | Refill DEF and check for leaks or system warnings. | |
| Water in Fuel | AMBER | The fuel-water separator has detected water contamination in the S40’s diesel supply. | Drain water separator to prevent injector or pump damage. | |
| Fuel Filter / Water Separator | AMBER | The S40’s fuel filter is clogged or the water separator requires servicing. | Replace the filter or drain water as indicated in the maintenance schedule. | |
| Engine Oil Temperature | AMBER | Engine oil in the S40 is running hotter than normal, which may stress engine components. | Allow the engine to idle and cool; check for oil level and cooling issues. | |
| Brake System | RED | A brake system fault has been detected, affecting safe operation of the S40. | Cease operation and have the braking system inspected immediately. | |
| Parking Brake | RED | The parking brake is engaged or not fully released on the S40. | Release the parking brake before moving the machine. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on engine hours on the S40. | Arrange for service at the next opportunity to maintain warranty and performance. | |
| Work Lights | BLUE | The S40’s auxiliary work lights are switched on for increased visibility. | No action needed unless lights are not required. | |
| Beacon / Rotating Light | AMBER | The S40’s rotating beacon is active, signaling operation to nearby personnel. | Ensure beacon is on in active zones for safety compliance. | |
| Swing / Slew Lock | AMBER | The swing lock on the S40 is engaged, restricting upper structure rotation. | Disengage swing lock before rotating the upper carriage. |
20 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Oil Pressure Low
Common causes
- Severe oil leak
- Worn oil pump
- Blocked oil filter
What to do
Immediately shut down the S40, check for visible leaks or oil loss, and replace the oil filter or repair components as needed before restarting.
Coolant Temperature High
Common causes
- Coolant loss
- Radiator blockage
- Failed thermostat
What to do
Stop the engine, allow it to cool, check coolant level and radiator for obstructions, and have the cooling system inspected if the issue persists.
Hydraulic System Fault
Common causes
- Hydraulic leak
- Contaminated fluid
- Damaged pump or hoses
What to do
Inspect the S40’s hydraulics for leaks or contamination, replace fluid if dirty, and service or replace faulty components as required.
Brake System Fault
Common causes
- Low brake fluid
- Worn brake pads
- Damaged brake lines
What to do
Do not operate the S40 until the brake system is checked, fluid topped off, and worn or damaged parts are replaced.
DPF Regeneration Required
Common causes
- Frequent short runs
- Incomplete previous regeneration
- DPF sensor malfunction
What to do
Follow the S40’s display instructions to complete a full regeneration cycle; if the warning persists, have sensors and DPF checked by a Volvo technician.
Frequently Asked Questions
What should I do if the master warning light appears on my S40?
Immediately stop the machine, check for specific fault codes on the display, and address the issue before resuming work.
How can I tell when regeneration is needed for the S40’s DPF?
The DPF/Regeneration light will illuminate amber and the display may prompt you to initiate a regeneration cycle.
Can I continue working if the fuel low light is on?
It’s best to refuel soon to avoid engine stalling, especially during critical operations or when working remotely.
Why does the hydraulic system light come on during operation?
This could indicate low hydraulic oil, a blocked filter, or a developing system fault—inspect and resolve before further use.
What does it mean if the DEF/AdBlue warning activates?
The S40’s DEF tank is low or there’s a malfunction; refill DEF and check the system for leaks or errors.