Multiquip Portable Generator DCA300SSJU4F3/PB/PD

Engine OFF and voltage selector switch in the 3-Phase, 240/139V position

6-pin plug unplugged from the CN1 receptacle on the AVR

SPST toggle switch connected between the positive battery terminal and pin J on the 6-pin plug

Wire connected from the negative battery terminal to pin K on the 6-pin plug

Toggle switch in the OFF (open) position, engine speed switch set to the low position (idle)

Engine started and toggle switch placed in ON position (closed)

Engine speed switch placed in the high position and engine running at full rpm

Selection dial on the multimeter placed to the AC volts position

Warning: This inspection requires trained personnel with PPE!

Visual inspection of generator for environmental factors

Inspection of electrical connections for rust, corrosion, and oxidation

Check for carbon flash deposits around the 120/240V AC receptacles

Signs of wire overheating (discoloration and a burnt smell)

Check for infestation inside the generator

Check terminal lugs/bus bars for secure tightening

Check electrical connectors for good connection

Warning: This procedure requires trained personnel with PPE!

If fuel pump relay did not test normal, report the issue to the maintenance team and stop the procedure

Is the generator model between DCA6 and DCA125?

If the generator model is not between DCA6 and DCA125, report the issue to the maintenance team and stop the procedure

Is the relay base holder not a ‘sealed type’?

If the relay base holder is a ‘sealed type’, report the issue to the maintenance team and stop the procedure

Is there corrosion and dirt in the relay base holder?

If there is no corrosion and dirt in the relay base holder, report the issue to the maintenance team and stop the procedure

Warning: Only perform this test with no load on the generator.

Place the selection dial on the multimeter to the W position, then select the sound icon.

With the engine OFF and no power applied to the relay, place the multimeter leads across terminals 95 and 96 on the relay and verify that there is continuity. This implies a CLOSED circuit, continuity.

PRESS the spring-loaded relay reset button.

Move the multimeter leads to terminals 97 and 98 on the relay and verify that there is no continuity. This implies an OPEN circuit, no continuity.

To trip the OCR, slide the manual trip lever on the relay and verify that the multimeter indicates an OPEN circuit across terminals 95 and 96. This implies an OPEN circuit, no continuity.

Move the multimeter leads to terminals 97 and 98 on the relay and verify that there is continuity. This implies a CLOSED circuit, continuity.

NOTICE: Before performing the continuity check, both surge protector lead wires (Figure 50) must be disconnected from the rotating rectifier.

Surge protector lead wires disconnected from the rotating rectifier

Place the selection dial on the multimeter in the Ω position.

Selection dial on the multimeter in the Ω position

Next, place the multimeter leads across the surge protector as shown in Figure 50 and verify that the meter displays an open circuit.

Multimeter leads placed across the surge protector

If the meter indicates continuity or another reading, replace the surge protector.

Does the meter indicate continuity or another reading?