PART 4
ENGINE/DC CONTROL
Page 102
Section 4.3
Operational Analysis
ENGINE STARTUP AND RUNNING
With the fuel solenoid open and ignition occurring, the engine starts. Engine startup and running may be briefly described as
follows:
•The ignition magnetos deliver a speed reference signal to the controller via Wire 18. Once the controller determines that the
engine is running, the controller (a) terminates cranking, (b) continuously energizes the choke solenoid (open position), and (c)
turns on an “engine warm-up timer”.
Note: On 8kW and 10kW units the choke is de-energized to the open position (Wire 90 open from ground).
•The “engine warm-up timer” will run for 5 seconds. When this timer finishes timing the controller’s logic will initiate a transfer to
the “Standby” position. As shown in Figure 99, the timer is still running and transfer has not yet occurred.
•Generator AC output is available to the transfer switch Terminal Lugs E1 and E2 and to the normally open contacts of the transfer
relay. However, the transfer relay is de-energized and its contacts are open.
Running - Utility Loss
0
BA
2
44
11
POWER
WINDING
33
22
WINDING
POWER
STATOR
0
00
00
11C
ACTUATOR
GOVERNOR
OUTPUT
GENERATOR
240 VAC
NEUTRAL
22
33
CB1
J5
PRINTED CIRCUIT BOARD
CONTROLLER
J4
18171615141312109 1186 7
POWER
ACCESSORY
120 VAC
OUTPUT
CB2
21 43 5 2322212019
141312109 1186 721 43 5
T1
00 2 44
11
0
4
6
T1T1
6
4
44
11
00
6
4
0
11
44
11 44
6
4
3
5 2 1
PIN #
C1
WINDING
EXCITATION
ROTOR
6
4
0
0
2
6
4
11 44
DIODE
FIELD BOOST
4
0
LOAD SUPPLY
120 VAC
11
WHT00
MOV
T1A
BATTERY CHARGER
Figure 99.
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