Troubleshooting Doosan Solar 225 NLC-V Excavator

When a fault occurs, it is important to take immediate corrective action.

The first step is to investigate and determine the cause of the failure. To prevent breakdowns, it is recommended to implement a maintenance plan that includes regular preventive actions.

When troubleshooting, it’s important to take a systematic approach to identifying and solving problems. Sometimes several recurring failures can lead to a new problem that hasn’t been encountered before.

If you can’t identify the cause of the fault, it is advisable to contact your DOOSAN distributor for assistance. It’s important not to make any adjustments or dismantle any hydraulic, electrical or electronic components without consulting your DOOSAN dealer.

Their expertise and guidance is essential to ensure proper handling and to prevent further problems.

Engine

Problem	Reason	Way Eliminate
Starter Not Acts.	Small Power Batteries.	Charge Battery.
	Bad Contact Output.	Clear и Tighten Connection.
	Failure Switch Starter.	Replace Switch.
	Failure Relay Starter.	Replace Relay.
	Failure Switch Starter.	Replace Controller.
	Defective Posting.	Replace Transaction.
	Failure Relay Battery.	Replace Relay.
	Burnt Fuse.	Replace Fuse.
Starter It’s working, Engine Not Starts	Fuel Thickened Of-For Cold Weather.	Replace Fuel.
	Clogged Fuel Filters.	Replace Filters.
	Water Or Dirt в Fuel System.	Clear System и Add New Fuel.
	Air в Fuel System.	Remove Air Of System.
	Failure Management Stop Engine.	Replace Management Stop.
	Failure Relay Stop Engine.	Replace Relay.
	Burnt Fuse.	Replace Fuse.
Engine Starts, It’s working Only On Small Speed Or Disables.	Incorrect Viscosity Oil Engine.	Replace Oil.
	Clogged Or Dirty Fuel Injectors.	Clear Injectors.
	Clogged Fuel Filters.	Replace Filters.
	Not Adjusted Cable Stop Engine	Adjust.
	Cable Management Speed Engine Not Adjusted.	Adjust.

Problem	Reason	Way Eliminate
Engine Knocks, It’s working Uneven Or Pushes.	Enough Motor Oil.	Pour Oil.
	Blocked System Intake Air.	Clear System и Replace Filter.
	Injection Pump Not Adjusted.	Contact к Dealer Company Doosan.
	Clogged Fuel Filter.	Replace Fuel Filter.
	Water Or Dirt в Fuel System.	Clear System и Add New Fuel.
	Clogged Or Dirty Fuel Injectors.	Clear Injectors.
Low Power Engine.	Blocked System Intake Air.	Clear System и Replace Filter.
	Clogged Or Dirty Fuel Injectors.	Clear Injectors.
	Clogged Fuel Filters.	Replace Filters.
	Cable Management Speed Engine Not Adjusted.	Adjust.
	Injection Pump Not Adjusted.	Contact к Dealer Company Doosan.
	Invalid Gap Valve.	Adjust Gap.
Hot Engine.	Enough Cooling Liquid.	Add Cooling Liquid.
	Fault Thermostat.	Replace Thermostat.
	Defective Cover Radiator.	Replace Cover Radiator.
	Clogged Core Radiator.	Clear Radiator.
	Clogged Core Cooler Oil.	Clear Cooler Oil.
	Strap Fan Weakened Or Damaged.	Tighten Or Replace When Need.
	Defective Sensor Temperature.	Replace Sensor.

Hydraulic System

Problem	Reason	Way Eliminate
Not Work All Bodies Management (Loud Noise Pumps)	Failure Hydraulic Pump.	Contact к Dealer Company Doosan.
	Enough Hydraulic Oil.	Add Hydraulic Oil On As Need.
	Line Suction Beaten Or Damaged.	Clear Or Replace When Need.
Not Work All BodiesManagement(Noise Pumps Not Heard)	Failure Pump Manager Path.	Contact к Dealer Company Doosan.
	Failure Clip Electromagnetic Valve.	Replace Solenoid.
	Switch Included.	Adjust Gap Breaker.

Problem	Reason	Way Eliminate
Low Power All Drives.	Enough Hydraulic Oil.	Add Hydraulic Oil On As Need.
	Vacuum-Filter Clogged.	Clear Filter.
	Failure Hydraulic Pumps.	Contact к Dealer Company Doosan.
	Pressure Unloading Main Flow Oil Too Little.	Contact к Dealer Company Doosan.
	Hydraulic Pumps Excavator.	Bleed Air Of Hydraulic Pumps.
Power Small Or Missing Only For One Or Two Functions.	Pressure Safety Valve Overload Too Little.	Reset Pressure.
	Leak Filling Reverse Valve.	Clear Or Replace When Need.
	Defective Spool Allocator.	Replace Spool Valve.
	Dirt в Zolotnike Valve.	Clear Or Replace When Need.
	Failure Executive Mechanism.	Repair Or Replace When Need.
	Failure Seal Cylinder.	Repair Or Replace When Need.
	Stock Cylinder Damaged.	Repair Or Replace When Need.
	Failure Valve Remote Management.	Replace Valve Management.
	Wrong Connection Control Lines.	Correct Connect Control Line.
Temperature Oil Too High.	Defective Cooler Oil.	Contact к Dealer Company Doosan.
	Weakened Strap Fan.	Tighten Strap Fan When Need.

System Turn

Problem	Reason	Way Eliminate
MissingRotate	Valve Brakes Turn Defective.	Replace Valve Brakes.
	Failure Timer Hydraulics.	Replace Timer.
	Low Pressure Releasing Brakes.	Adjust Pressure.
	Failure Engine Turn.	Replace Motor Turn.
	Failure Valve Remote Management.	Replace Valve Management.
	Wrong Connection Control Lines.	Correct Connect Control Line.
Rotate Spurts.	Wear Reducer Mechanism Turn.	Replace Reducer Mechanism Turn.
	Damaged Bearing Mechanism Turn.	Replace Bearing.
	Bad Lubrication.	Add Lubricant.

Problem	Reason	Way Eliminate
Function Turn Not Functions.	Leak Central Hinge	Repair Or Replace When Need.
	Brake Not Disables	Repair Parking Brake.
	Failure Engine Turn	Repair Or Replace When Need.
	Failure Valve Remote Management.	Repair Or Replace When Need.
	Wrong Connection Control Lines.	Correct Connect Control Line.
Too Low Speed Turn	Too Great Or Too Small Tension Truck.	Adjust Tension.
	Damaged Rollers Or Blanks Rollers.	Repair Or Replace When Need.
	Damage Frame Caterpillar.	Repair.
	Brake Not Disables	Repair Parking Brake.

Electric System

Problem	Reason	Way Eliminate
Battery Not Keeps Charge.	Small Power Batteries.	Clear и Tighten.
	Strap Generator Weakened Or Damaged.	Tighten Or Replace Strap.
	Poorly Pinned Or Corroded Conclusions.	Tighten Or Replace When Need.
	Fault Generator.	Repair Or Replace When Need.
Small Power Batteries.	Internal Kz Battery.	Replace Battery.
	Kz Transaction.	Repair.
Speed Engine Not Regulated.	Failure Disk Regulation Revolutions Engine.	Replace Disk Regulation Revolutions Engine.
	Failure Controller Throttle.	Replace Controller.
	Failure Management Speed Engine.	Repair Or Replace When Need.
	Burnt Fuse.	Replace Fuse.
	Damaged Posting.	Repair Or Replace When Need.
	Failure Connector.	Repair Or Replace When Need.
Selector Mode Power Not It’s working.	Burnt Fuse.	Replace Fuse.
	Failure Switch Select Mode Power.	Replace Switch.
	Failure Connector.	Replace Connector.
	Damaged Posting.	Repair Or Replace When Need.
	Failure Controller E-EPOS.	Repair Or Replace When Need.

Problem	Reason	Way Eliminate
Selector Mode Work Not Acts.	Burnt Fuse.	Replace Fuse.
	Selector Mode Work.	Replace Switch.
	Failure Connector.	Replace Connector.
	Damaged Posting.	Repair Or Replace When Need.
	Failure Controller E-EPOS.	Repair Or Replace When Need.