Multiquip Portable Generator DCA600SSV4F3

Loosen the jam nut that secures the MPU to the sensor plate

Visually view the flywheel teeth through the hole opening on the sensor plate

Attach a ratchet to the crankshaft pulley and rotate the flywheel gear until the highest point of the flywheel gear tooth is visible

Reinstall the MPU sensor back into the sensor plate. Continue screwing the MPU sensor clockwise until contact is made with the flywheel gear tooth

After making contact with the flywheel gear tooth, unscrew the MPU sensor counterclockwise 1/2 turn

Verify that the MPU sensor does not make contact with the flywheel by rotating the flywheel gear completely around. Flywheel should rotate freely

The MPU sensor-flywheel gear gap should be adjusted so that the minimum voltage required is attained while the engine is in crank status. The voltage setting we are looking to obtain is 2.25 VAC +/- 0.50 VAC

Once the correct gap is obtained, tighten the MPU sensor jam nut to secure it to the sensor plate

Warning: This adjustment requires trained personnel with PPE!

Do you have a small, flat-blade screwdriver?

Turn the engine crank disconnect adjustment potentiometer 30 turns counterclockwise

Turn the engine crank disconnect adjustment potentiometer about 3 turns clockwise

Try to start the engine. Did the starter crank but disengage quickly?

If the engine starts, is the ECU engine running lamp lit?

Once verified, did you shutdown the engine?

With the engine shutdown, adjust the the engine crank disconnect adjustment potentiometer 1 turn clockwise

Try restarting the engine. Did the engine start reliably?

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 position, engine speed switch set to low position, engine started, and toggle switch placed in ON position

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

Selection dial on the multimeter set to the AC volts position

Voltage at the U, V and W terminals on top of the main circuit breaker

Warning: This procedure requires trained personnel with PPE!

Multimeter test leads placed across pins 1 and 2 on the ECU auto-start module

Multimeter reading between 2.25 VAC ± 0.50

If a low voltage reading is obtained, reference the 'MPU Installation and Adjustment' section

Sign off on the Mpu Ac Voltage 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.

Is the selection dial on the multimeter in the diode position?

Did you place the positive lead from the multimeter on the DC POSTIVE (+) terminal of the rectifier (Figure 48)?

Did you touch the U, V and W terminals one at a time with the NEGATIVE (–) lead?

Did each terminal give a continuity reading?

Did you reverse the multimeter leads?

Did you place the NEGATIVE lead of the multimeter on the DC Positive (+) terminal of the rectifier (Figure 49)?

Did you touch U, V and W terminals with the positive lead?