Jacobsen LF 3400 Service Manual

5 TROUBLESHOOTING
GB-26
5.2 CONTROLLER LAMPS _____________________________________________________
The controller is a solid state device that monitors and
controls electrical functions. The controller receives input
signals from various switches and sensors throughout the
machine and transmits output signals to operate relays,
solenoids and warning lights. It controls and resets timers
and contains built in logic to control certain machine
functions.
Each input and output signal is displayed through lamps
located on top of the controller. A closed input switch
indicates 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.
It is important to note that in some cases a lamp or group of
lamps must be on or off for a condition to be true. For
example, to start the tractor the Mow Switch must be off
(lamps 25, 28, 38 off) while the Neutral Start Switch (lamp
5), Brake Switch (lamp 6) and Fuel Valve Hold coil (lamp 34)
must be on.
Inactive lamps 5 Gang- 14, 15, 16, 19, 20, 21, 24, 26, 27, 29, 30, 37, 39, 41, 42, 45, 46, 47, 48 (not used)
Inactive lamps 7 Gang - 1, 14, 15, 30, 41, 48 (not used)
Controller Functions by Lamp Number
Lamp On - Circuit is active
Lamp Off - Circuit is inactive
INPUTS OUTPUTS
Lamp Circuit Lamp Circuit
1
Program active (5 Gang Only)
31
Glow Plug Relay & Indicator - Glow Plug On
2, 3
Program active - indicates controller has power
32
Light Test
4
Key Switch “Start” Post
33
Start Relay and Indicator
5
Neutral Start Switch - Traction Pedal in Neutral
34
Fuel Valve Hold Coil
6
Brake Switch - Brake On
35
Warning Horn
7
Seat Switch - Operator Seated
36
Hydraulic Oil Level Light
8
Backlap Service Switch - Set to backlap
37
Left Wing Mow Switch - Active Signal (7 Gang Only)
9
Cruise Control Switch - Off - Pin 1 (Option)
38
Center Mow Switch - Active signal
10
Cruise Control Switch - On - Pin 2 (Option)
39
Right Wing Mow Switch - Active Signal (7 Gang Only)
11
Hydraulic Oil Level Float Switch
40
Cruise Control Valve / Light (Option)
12
Hydraulic Oil Level Alarm Switch
42
Lift Valve - Center Rear Mowers (7 Gang Only)
13
Engine Oil Pressure Switch
43
Lift Valve - Lower
16
Lift Limit Switch - Left Wing (7 Gang Only)
44
Lift Valve - Raise
17
Lift Limit Switch - Left Front
45
Lift Valve - Left Wing Mower (7 Gang Only)
18
Lift Limit Switch - Right Front
46
Lift Valve - Front Mowers (7 Gang Only)
19
Lift Limit Switch - Right Wing (7 Gang Only)
47
Lift Valve - Right Wing Mower (7 Gang Only)
20
Joystick - Left Wing (7 Gang Only)
21
Joystick - Right Wing (7 Gang Only)
22
Joystick - Lower
23
Joystick - Raise
24
Left Wing Mow Switch - Forward (7 Gang Only)
25
Center Mow Switch - Forward
26
Right Wing Mow Switch - Forward (7 Gang Only)
27
Left Wing Mow Switch - Reverse (7 Gang Only)
28
Center Mow Switch - Reverse
29
Right Wing Mow Switch - Reverse (7 Gang Only)

Jacobsen LF 3400 Specifications

General

Brand	Jacobsen
Model	LF 3400
Category	Lawn Mower
Language	English