1. 5/10KW TQG DC CIRCUITS Preheat Circuit Crank Circuit Fuel Circuit
Field Flash Circuit
Battery Charging Circuit

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

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

4. CB1-Pushed in
S17 Pulled out
Normal
Start Here

5. Start Here
L4 1
L4 +
B1 +

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

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

19. K18 IS’NT ENERGIZED YET
CONTACTS STILL OPEN

20. Now the K18 is energized.
L4 1

21. Contacts close

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

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

26. Start Here

27. Energize K16
Start Here

34. TB5 12

36. TB6

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

48. Now K16 is energized.

49. Energize K2
Start Here

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

59. Start Here

61. L4 is energized and the starter motor engages.

62. 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.

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

64. S14 WILL 900RPM
Start Here

65. Energize E2
Start Here

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

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

84. You cant go thru the K18 since its not energized.

85. Now E2 is energized.

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

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

95. 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

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

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

98. Energize K15
Start Here

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

115. Now K15 is energized.

116. Flash G1
Start Here

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

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

132. CIRCUIT COMPONENTS
G2: Battery charging alternator.
FU1: Fuse

133. Start Here

134. Start Here

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

150. Start Here