54
Service Manual – SC500
04 - Control System
J4 - 4 Ways
Figure 40:
PIN
Color
Circuit Description
Measured
Comments
1
White
Enabling from battery charger
24.8v Not Charging
May see residual
voltage back-feeding
from the main
controller here when
charging.
2
Yellow
Power supply from battery charger
0.136v Not charging
26.1v Charging
3
Brown
Battery charger enabling power supply
24.8v key on or off
Constant power
whether charging or
not. Key on or off.
4
Green
Battery charger data communication
4.98v when charger is first plugged in. Then
dropped to 4.6
J5 - 3 Ways
Figure 41:
PIN
Color
Circuit Description
Measured
Comments
1
Brown
Power supply for water level
24.7v
Key on
2
Black
Water level sensor return
4.98
0.03v
Tank < ½ full
Tank > ½ full
3
Blue
Power supply for water level sensor -
0.001