Multiquip Portable Generator DCA150SSJU4F3

NOTICE: For complete engine inspection and service specifications, consult the Engine Manufactures 'Owners' and/or 'Service' Manuals.

Air cleaner for restrictions and contaminants. Replace if necessary.

Cooling system hoses for cracks and distortions — tighten clamps or repair as needed.

Radiator for restrictions and corrosion.

Engine block heater for leaks and verify unit functioning properly. Engine block heater is an option on some units.

Coolant, fuel and oil leaks. Tighten connections or repair as needed.

Belts and pulleys for cracks and wear — adjust or repair as needed.

Governor and injection pump for leaks and proper operation.

Turbocharger for proper clearance and free movement as required. Reference engine service manual.

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: Activating the test button while the unit is running will shunt trip the main circuit breaker. Only perform with no load on the generator

NOTICE: The GFCI receptacle is designed to interrupt power when a ground fault exists to prevent injuries and shock hazards. DO NOT use the GFCI receptacle if the test below fails. Consult a qualified electrician for repair or replacement of the GFCI receptacle. Test the GFCI receptacle at least once a month.

Start the generator as outlined in the start-up procedure in this manual.

Place a GFCI circuit breaker (Figure 63) in the ON position.

Verify that the status LED on the corresponding GFCI receptacle (Figure 63) is ON (GREEN).

Press the TEST button (Figure 65) on the GFCI receptacle and verify that the status LED turns OFF.

Press the RESET button (Figure 66) to restore power to the GFCI receptacle and verify that the status LED is ON (GREEN).

If the status LED (Figure 67) is flashing (RED), DO NOT use the GFCI receptacle and replace it immediately.

Sign off on the GFCI Method Test

Place the multimeter test leads across pins 1 and 2 on the ECU auto start module as shown in Figure 73.

Set the multimeter selection dial to the sound position and verify that there is continuity (beep!) between the pin 1 (BLACK/WHITE) and pin 2 (RED) wire leads on the ECU auto start module as referenced in Figure 73.

If the multimeter reads OPEN (no continuity or beep), replace the MPU sensor.

Sign off on the Mpu Continuity Test

NOTICE: Before performing the continuity test, all lead wires (Figure 48) must be disconnected from the rectifier.

The rotating rectifier is connected to both the main field and exciter armature and is mounted on the exciter stator armature.

Selection dial on the multimeter in the diode position

Positive lead from the multimeter on the DC POSTIVE (+) terminal of the rectifier (Figure 48)

Touch the U, V and W terminals one at a time with the NEGATIVE (–) lead. Each terminal should give a continuity reading.

Reverse the multimeter leads. Place the NEGATIVE lead of the multimeter on the DC Positive (+) terminal of the rectifier (Figure 49) and touch U, V and W terminals with the positive lead. This should cause the multimeter to read open circuit.

NOTICE: If the rotating rectifier fails any of the tests as referenced in Figure 48 or Figure 49, replace the rectifier.

Sign off on the rotating rectifier test