5 TROUBLESHOOTING
24
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 indicates 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, 37, 38 and 39 off) while the Neutral Start Switch
(lamp 5), Brake Switch (lamp 6) and Fuel Hold coil (lamp 34)
must be on.
Inactive lamps - 1,2, 8, 14, 15, 17, 18, 24, 26, 27, 29, 30, 48 (not used)
5.3 ELECTRICAL CIRCUITS ____________________________________________________
When troubleshooting the machine using the controller
always check that lamp 3 is on. This lamp indicates that the
controller has power and the program is active.
Note:
The controller requires a minimum of six volts to
operate.
Individual circuits can be tested by operating an input
switch, checking for the required input signal and looking for
a corresponding output. Keep in mind that not all switches
are located on the instrument panel. The traction pedal, lift
limit and brakes are controlled by small proximity switches
mounted on the frame of the tractor.
If an input lamp does not light an inactive condition is
indicated. This could be caused by a fuse, faulty switch, a
switch that needs adjustment or poor connection.
The electrical connections to the solenoids on the hydraulic
valves are also equipped with small indicator lamps. When
lit these lamps indicate that the output signal has reached
the connection. If lamps do not come on, check wires to and
from connector.
Controller Functions by Lamp Number
Lamp On - Circuit is active
Lamp Off - Circuit is inactive
INPUTS
OUTPUTS
Lamp
Circuit
Lamp
Circuit
3
Program active - indicates controller has power
31
Glow Plug Relay & Indicator - Glow Plug On
4
Key Switch “Start” Post
32
Light Test
5
Neutral Start Switch - Traction Pedal in Neutral
33
Start Relay and Indicator
6
Brake Switch - Brake On
34
Fuel Hold Coil
7
Seat Switch - Operator Seated
35
Warning Horn
9
Cruise Control Switch - Off - Pin 1 (Option)
36
Hydraulic Oil Level Light
10
Cruise Control Switch - On - Pin 2 (Option)
37
Mow Switch - Left Wing Mower Active
11
Hydraulic Oil Level Float Switch
38
Mow Switch - Center Mower Active
12
Hydraulic Oil Level Alarm Switch
39
Mow Switch - Right Wing Mower Active
13
Engine Oil Pressure Switch
40
Cruise Control Valve / Light (Option)
16
Lift Limit Switch, Left Wing
41
Lift Valve - Pressure
19
Lift Limit Switch - Rightt Wing
42
Lift Valve - Raise Left Wing Mower
20
Joystick - Left Mower- Pin 4
43
Lift Valve - Raise Center Mower
21
Joystick - Right Mower- Pin 5
44
Lift Valve - Raise Right Wing Mower
22
Joystick - Lower- Pin 3
45
Lift Valve - Lower Left Wing Mower
23
Joystick - Raise - Pin 2
46
Lift Valve - Lower Center Mower
25
Mow Switch Engaged- Pin 1
47
Lift Valve - Lower Right Wing Mower
