5/10KW TQG DC CIRCUITS Preheat Circuit Crank Circuit Fuel Circuit Field Flash Circuit Battery Charging Circuit

PREHEAT CIRCUIT In a cold weather environment with S1 in position #1, the intake manifold/ head fails to warm up

CIRCUIT COMPONENTS K18: Preheat relay HTR1, and HTR2: heaters add HTR3 & 4 for 10KW units

CB1-Pushed in S17 Pulled out S10 @ Normal Start Here

Start Here L4 1 L4 + B1 +

THIS IS THE BEGINNING OF THE RETURN PATH Once current LEAVES the S1 it will take the same path back to the power source.

Don’t go thru the K2 because it is not energized.

K18 IS’NT ENERGIZED YET CONTACTS STILL OPEN

Now the K18 is energized. L4 1

Contacts close

S-1 is in position 5, generator fails to crank. CRANK CIRCUIT S-1 is in position 5, generator fails to crank.

CIRCUIT COMPONENTS K16: Crank disconnect relay K2: Cranking relay. L4: Starter solenoid. B1: Cranking motor(starter).

Start Here

Energize K16 Start Here

TB5 12

TB6

Don’t go thru the K2 because it is not energized.

Now K16 is energized.

Energize K2 Start Here

S1 Once the current reaches the S1 it takes the same path back to the power source.

Start Here

L4 is energized and the starter motor engages.

FUEL CIRCUIT With the S-1 in position 5, the generator cranks and fails to start/ runs & when the S-1 is released TO position 4, the generator shuts OFF.

CIRCUIT COMPONENTS L5: Fuel shut off solenoid. E2: Fuel pump.

S14 WILL OPEN @ 900RPM Start Here

Energize E2 Start Here

Once current reaches the S1 it will take the same path back to the power source.

Don’t go thru the K2 even though its energized.

You cant go thru the K18 since its not energized.

Now E2 is energized.

Once current reaches K2 A1 It follows current back to the power source.

Once current reaches TB4-12, it flows back to power source.

INITIAL FIELD FLASH CIRCUIT While holding S1 is in position 5, generator cranks and runs. You observe no hertz and no volts on the meters M1 & M2

CIRCUIT COMPONENTS K15: Field flash relay. G1: Main AC generator

S14 Senses the Engine Speed Via MPU @ 900RPM S14 OPENS & K16 de-energizes F1 F2 G1 Start Here

Energize K15 Start Here

Once current reaches the S1 it will take the same path back to the power source.

Now K15 is energized.

Flash G1 Start Here

Once current reaches TB5-14, it flows back to power source.

BATTERY CHARGING CIRCUIT With S1 in position 4, and the generator running. The battery charging ammeter (M4) shows a discharge reading.

CIRCUIT COMPONENTS G2: Battery charging alternator. FU1: Fuse

Start Here

Start Here

Once current reaches the S1 it will take the same path back to the power source.

Start Here