Operator's Manual

24
OPERATING INSTRUCTIONS
Using the Diagnostic Display, determine which output
is malfunctioning, refer to Checking 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:
1. Loopback is not connected.
2. The light is burned out.
3. Fuses are blown.
4. No battery power.
Check electrical connections, input fuses and
diagnostic light bulb to determine malfunction. Make
sure loopback connector is secured to wire harness
connector.
DIAGNOSTIC DISPLAY
The RM 5500-D 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.
The Diagnostic Display is a tool to help the user verify
correct electrical functions of the machine.
CHECKING INTERLOCK SWITCHES
The purpose of the interlock switches are to prevent
the engine from cranking or starting unless the traction
pedal is in NEUTRAL, the Enable / Disable switch is in
DISABLE and the Lower Mow / Raise control is in the
neutral position. In addition, the engine will stop when
the traction pedal is depressed with operator off the
seat or when parking brake is engaged.
THE INTERLOCK SWITCHES ARE FOR
THE PROTECTION OF THE OPERATOR
AND BYSTANDERS, AND TO ENSURE
CORRECT OPERATION OF THE MA
CHINE, SO DO NOT BYPASS OR DISCON
NECT THEM. CHECK OPERATION OF
THE SWITCHES DAILY TO ASSURE IN
TERLOCK SYSTEM IS OPERATING. IF A
SWITCH IS DEFECTIVE, REPLACE IT
BEFORE OPERATING. THE CONTROL
LER HAS THE ABILITY TO DETECT BY
PASSED SWITCHES AND MAY PREVENT
THE OPERATION OF THE MACHINE IF
SWITCHES ARE BYPASSED. DO NOT
RELY ENTIRELY ON SAFETY SWITCHES
- USE COMMON SENSE!
CAUTION
To verify interlock switch function:
1. Park machine on a level surface, lower the cutting
units, stop the engine and engage the parking brake.
2. Open control panel cover. Locate wire harness and
connectors near controller. Carefully unplug loop back
connector from harness connector.
Figure 39
1. Wire Harness and Connectors
1
3. Connect the Diagnostic Display connector to the
harness connector. Make sure correct overlay decal is
positioned on Diagnostic Display.
4. Turn the key switch to the ON position, but do not
start machine.
Figure 40
1. Diagnostic Display
1
Note: The red text on the overlay decal refers to input
switches and the green text refers to outputs.
5. The inputs displayed" LED, on lower right column
of the Diagnostic Display, should be illuminated. If
outputs displayed" LED is illuminated, press the
toggle button, on Diagnostic Display, to change LED to
inputs displayed".
6. The Diagnostic Display will illuminate the LED
associated with each of the inputs when that input
switch is closed.
Individually, change each of the switches from open to
closed (i.e., sit on seat, engage traction pedal, etc.),
and note that the appropriate LED on Diagnostic
Display will blink on and off when corresponding
switch is closed. Repeat on each switch that is it
possible to be changed by hand.