Doosan Doosan Generator G40WMI-2A-T2 (B50) G40WMI-2A-T2 (B50)

Check for loose wire routing clamps. Clamps must be secure and properly mounted. Also check wiring for wear, deterioration and vibration abrasion.

Check for evidence of arcing around electrical terminals.

Check that the grounding circuit is in accordance with the National Electrical Code Article 250-122 and the local code requirements. As a minimum, the copper wire size should be American Wire Gauge 8 (AWG#8) from the grounding terminal, frame, generator and engine block.

Check for loose, or frayed wiring insulation or sleeving.

Check for water in the fuel filter/water separator unit. Some engines have a translucent bowl for visual indication, and others have a drain valve below the primary element.

Clean the air vents of any obstruction or debris.

Check Evidence of Arcing around electrical terminals.

Check Loose Wire Routing Clamps.

Check Engine Oil and Coolant Level.

With all electric loads disconnected, engine stopped and main breaker turned on, turn VOLTAGE SELECTOR Switch to 277/480V position, and close and latch the VSS door.

Voltage POT(P2) on regulator adjusted to full counterclockwise position

Voltage POT on control panel adjusted to full clockwise position

Set the VOLTAGE OUTPUT MONITOR switch on the control panel to L1-L2 position.

Voltage POT(P2) on the regulator adjusted to read 500V on AC voltmeter

Stability POT(P3) adjusted counter clockwise until the AC volts within ± 1 volt

Then turn the adjusting Stability POT (P3) some 5-10 degrees clockwise.

• Servicing or troubleshooting must be carried out strictly in accordance with instructions so as to avoid the risk of accidents and to maintain the machine in its original state.

• All such operations performed on the alternator should be undertaken by personnel with training of electrical and mechanical components.

• Before any intervention on the machine, ensure that it cannot be started by a manual or automatic system and that you have understood the operating principles of the system.

• It is advisable to check that circulation of air is not reduced by partial blocking of the suction and discharge louvres: mud, fibre, grease, etc.

• Cleaning product for the windings

WARNING! Do not use: Trichlorethylene, perchlorethylene, trichloroethane and any alkaline products.

1. Voltage Selector Door Interlock Switch

• Every three months or 250 operating hours, the interlock switch should be checked. Running with no electric load, open the VOLTAGE SELECTOR door. This will shutdown the engine and trip the main breaker. To reset, close the door.

2. High Containment Fluid Alarm System

• The operation of the high containment fluid alarm system should be checked every 3 months or whenever it appears not to be operating properly.

• The level switch is located at the lower end of a pipe at the bottom of the containment tank.

• Test the switch by unfastening the u-bolts holding the pipe, and then inverting the pipe to allow the switch float to fall.

• The “High Containment Level” LED should illuminate. Replace any defective switch.

• Drain the containment area using the drain plug at either end of the containment basin.;

• Each month it is recommended that the intake hoses from the air cleaner and all flexible hoses used for water and fuel be inspected for the following:

1) All rubber hose joints and the screw type hose clamps must be tight and the hoses showing no signs of wear, abrasion or deterioration.

2) All flexible hoses must be free of wear, deterioration and vibration abrasion. Routing clamps must be secure and properly mounted.

2. Each month, inspect the radiator exterior for obstructions, dirt and debris. If present, blow water or compressed air containing a non-flammable solvent between the fins in a direction opposite the normal air flow. Should the radiator be clogged internally, reverse flushing, using a commercial product and the supplier’s recommended procedure, may correct the problem.

• On Keystart models, each month the diagnostic lamps should be tested. With unit shutdown and emergency stop pushed, turn the Engine Start Switch to “START”, or pull the ESTOP to apply power to the controller. All diagnostic lamps should glow; If not, refer to troubleshooting.

4. Diagnostic Trouble Code (DTC) Display

• On models with Electronic (ECU) engines, each month, the DTC display should be tested. When unit is started, the DTC Display should show dashes (---) or a trouble code if there is a fault condition.