Bryant ASPAS1BBA015 - Manual (Page 82)

Page 82
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:
• An AC voltage/frequency signal is delivered to the
circuit board from the generator engine run winding,
via Wire 66A. When AC frequency reaches
approximately 30 Hz, the circuit board (a)
terminates cranking, and (b) turns on an "engine
warm-up timer".
CHARGER
BATTERY
0
162
22
VOLTAGE
REGULATOR
ELECTRONIC
6
4
0
11
(STATOR)
DPE WINDING
C2-8
2
C2-7
C2-11
C2-10
CB2
4
0
22
6
BA
FIELD
0
13
11 0
77
C2-1
3
1
2
C1-3
4
11
16
17
12
13
15
14
C2-3
PRINTED CIRCUIT
0
C1-6
C2-9
0
0
55
C2-4
4
0
WINDING
ENGINE RUN
(STATOR)
66
CONTROL
BOARD
3 2 1
J2
3
7
9
4
6
5
J1
5 4
1
2
66A
66A
85
351
HTO
C1-4
C2-2
0
0
SW2
17
225
15
224
0
66A
14
194
23
194
56
15A
66A
239
18
86
23
224
4
86
0
LOP
14
225
239
15A
23
194
13
225B
BATTERY CHARGE
WINDING
13
1
2
77
224B
11
22
1 6
66
3 4
225A
224A
9 9 7 7 7 7 9 9
BCR
0
14
13
13
13
0 0
224
225A
225
224A
22
11
0 0
15A
TX - TRANSFORMER, 16 Vac 56 VA & 16 Vac 1 VA (DUAL SEC.)
DIAGRAM KEY
BA - BRUSH ASSEMBLY
SCR - STARTER CONTACTOR RELAY
SC - STARTER CONTACTOR
HTO - HIGH OIL TEMPERATURE SWITCH
FS - FUEL SOLENOID
CB1 - CIRCUIT BREAKER, MAIN OUTPUT
LOP - LOW OIL PRESSURE SWITCH
IM2 - IGNITION MODULE, CYLINDER #2
IM1 - IGNITION MODULE, CYLINDER #1
SW1 - AUTO / OFF / MANUAL SWITCH
SM - STARTER MOTOR
SW2 - SET EXERCISE SWITCH
SP1, SP2 - SPARK PLUGS
CB2 - CIRCUIT BREAKER, ALT. EXCITATION
BCR - BATTERY CHARGE RELAY
F2 - FUSE 7.5 AMP
D - DIODE
F1 - FUSE 15 AMP
CB3 - CIRCUIT BREAKER, EXTERNAL OUTLET, PUSH/PULL
= 12 VDC ALWAYS PRESENT
= AC VOLTAGE
= GROUND FOR CONTROL PURPOSES
= 12 VDC DURING CRANKING ONLY
= DC FIELD CONTROL VOLTAGE
= 12 VDC DURING ENGINE RUN CONDITION
SECTION 4.2
OPERATIONAL ANALYSIS
PART 4
DC CONTROL