B
ELECTRICAL SYSTEM
en-75
Safety, Operation, & Maintenance Manual
Lithium
MCU CONTROLLER LIGHTS___________________________________________
The MCU controller is a solid state device that monitors and controls mower functions. The MCU communicates with the
other controllers via the CAN network.
Each input and output signal is displayed through lamps located on top face of the controller. A closed input switch indi-
cates an active circuit and will turn an input lamp on, an open switch an inactive circuit and will turn a lamp off. Outputs
are active when their lights are on.
Controller Functions by Lamp Number
Lamp On - Circuit is active
Lamp Off - Circuit is inactive
INPUTS OUTPUTS
Lamp Circuit Lamp Circuit
1 +48 Volt DC Power In 4 Fuel Pull Solenoid
2 +12 Volt DC Fuel Solenoid Power In 5 Fuel Hold Solenoid/Anti-Fire Solenoid
3 +12 Volt DC Power In 6 Glow Plug Relay
13 Spare 12 Volt Digital Low In 7 Start Relay
14 Genset Status 8 Traction Contactor Output
15 Program Select #4 9 Head Light
16 Program Select #3 10 TCU Fan Output
17 Program Select #2 (Diesel) 11 Spare Output #2
18 Program Select #1 (Gas) 12 Silent Mode Output
19 Spare 48 Volt Digital In #5
20 Spare 48 Volt Digital In #4
21 Spare 48 Volt Digital In #3
22 Spare 48 Volt Digital In #2
23 Spare 48 Volt Digital In #1
24 Seat Switch
SPARE 12V DGTL LO IN
GENSET STATUS
PROGRAM SELECT #4
INPUTS
PROGRAM SELECT #3
PROGRAM SELECT #2
PROGRAM SELECT #1
SPARE DIGITAL IN #5
SPARE DIGITAL IN #4
SPARE DIGITAL IN #3
SP 48V DGTL IN #2
SP 48V DGTL IN #1
SEAT SWITCH
OUTPUTS
+48VDC POWER IN
+12VDC FUEL SOL PWR IN
+12VDC POWER IN
FUEL PULL SOLENOID
FUEL HOLD SOLENOID/
ANTI-FIRE SOLENOID
GLOW PLUG RELAY
START RELAY
TRACTION CONTRACTOR
HEAD LIGHT
TCU FAN OUTPUT
SPARE OUTPUT #2
SILENT MODE OUTPUT
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
J2J3J4
To Next Page
Need help?
General
