Table of Contents
Advertisement
Understanding the Diagnostic
Light
The machine is equipped with a diagnostic light which
indicates if the electronic controller senses an electronic
malfunction. The diagnostic light is located on the control
arm (Figure 23). When the electronic controller is functioning
correctly and the key switch is moved to the On position,
the controller diagnostic light will turn ON for 3 seconds
and turn OFF to indicate the light is working properly. If
the machine kills the light will turn on steady until the key
position is changed. The light will blink if the controller
detects a malfunction in the electrical system. The light will
stop blinking and automatically reset when the key switch is
turned to the Off position once the fault has been resolved.
1. Diagnostic light
When the controller diagnostic light blinks, one of the
following problems has been detected by the controller:
•
One of the outputs has been shorted.
•
One of the outputs is open circuited.
Using the diagnostic display, determine which output is
malfunctioning; refer to Checking the Interlock Switches.
If the diagnostic light is not illuminated when the key switch is
in the On position, this indicates that the electronic controller
is not operating. Possible causes are as follows:
•
Loop-back is not connected.
•
The light is burned out.
•
Fuses are blown.
•
It is not functioning correctly.
Check the electrical connections, input fuses, and diagnostic
light bulb to determine the malfunction. Ensure that the
loop-back connector is secured to the wire harness connector.
Figure 23
Diagnostic Ace Display
The machine is equipped with an electronic controller which
controls most machine functions. The controller determines
what function is required for various input switches (i.e. seat
switch, key switch, etc.) and turns on the outputs to actuate
solenoids or relays for the requested machine function.
For the electronic controller to control the machine as
desired, each of the input switches, output solenoids, and
relays must be connected and functioning properly.
Use the Diagnostic ACE display to help verify and correct
electrical functions of the machine.
Checking the Interlock
Switches
The purpose of the interlock switches is to prevent the
engine from cranking or starting unless the traction pedal is
in the Neutral position, the Enable/Disable switch is in the
Disable position, and the Lower Mow/Raise control is in the
Neutral position. In addition, the engine should stop when
the traction pedal is pressed with operator off of the seat or if
the parking brake is left engaged.
CAUTION
If safety interlock switches are disconnected or
damaged the machine could operate unexpectedly
causing personal injury.
• Do not tamper with the interlock switches.
• Check the operation of the interlock switches
daily and replace any damaged switches before
operating the machine.
Verifying the Interlock Switch Function
1. Park the machine on a level surface, lower the cutting
decks, stop the engine, and engage the parking brake.
2. Remove the access panel from the side of the control
arm.
3. Locate the wire harness and connectors near the
controller (Figure 24).
24
Advertisement
Table of Contents
