Wiring Diagram Checkpoints For Diagnosis - A.O. Smith 510 Outdoor Service Manual

7. Wiring diagram check points for diagnosis
The table below applies to both the 510 Indoor and 510 Outdoor.
Check-
Part and Description
point
A, A1 100V Power supply
A2, A3 120V Power supply
B Igniter
B1 Heater
C Gas valves
C1 Hi-limit switch
C2 Overheat cutoff fuse
D1,D2 Easy-link connectors
E1 Mixing thermistor
E2 Output thermistor
E3 Inlet thermistor
F Remote controller
G Fan motor
510 Indoor / 510 Outdoor Service Manual
Color of wires
White – Black (A)
Brown – Brown (A1)
Black - White
Purple - Purple
Black - Black
Light blue - blue at COM (MV)
Green - blue at COM (SV1)
Orange - blue at COM (SV2)
Red - blue at COM (SV3)
Blue - Blue
Blue - Blue
Black - White
Black - Black
Black - Black
Black - Black
*
Red - Blue
Yellow - Blue
Orange - Blue
12
CONFIDENTIAL
Ver. 1.00
Normal range
90 to 110 VAC
108 to 132 VAC
90 to 110 VAC
90 to 110 VAC
78 to 100 VDC (during
operation) / 0.9 to 1.3 kΩ
78 to 100 VDC (during
operation) / 1.3 to 1.9 kΩ
78 to 100 VDC (during
operation) / 1.3 to 1.9 kΩ
78 to 100 VDC (during
operation) / 0.9 to 1.7 kΩ
Less than 1 VDC
and
less than 1.0 Ω
Less than 1 VDC
and
less than 1.0 Ω
15 VDC
(during Easy-link operation)
See table on p. 11
11 to 25 VDC
110 to 160 VDC
13 to 17 VDC
2 to 6.5 VDC