48
TROUBLESHOOTING GUIDE, CONT’D.
PROBLEM
POSSIBLE CAUSE
TEST BASE SYSTEM TEST PROCEDURE / REMEDY
Speed display
is not lit and
tractor does not
run.
Power switch is
OFF.
1A
Turn ON the main ON/OFF switch located in the power entry
module. (see Figure 1)
No power to
machine.
1B
Verify the power cord is OK and the correct voltage exists at the
outlet.
Blown fuse.
1C
Unplug the power cord. Check the machine’s power input fuse(s).
The fuse(s) is located in the power entry module and is accessible
without opening the case.
Faulty accessory
attached to the
master drive
accessory port.
1D
Remove any accessory plugged into the master drive accessory
port (see figure 2). Plug in the power cord and turn on the main
power.
a) If the speed display does not light, proceed with test 1E
b) If the speed display lights, install the connector cover on
the accessory port.
NOTE:
FAILURE TO INSTALL THE
CONNECTOR COVER ON THE ACCESSORY PORT AFTER
COMPLETING THIS TEST MAY CAUSE SERIOUS INJURY
FROM ACCIDENTAL ELECTRICAL SHOCK.
Set the tractor for continuous forward motion at full speed. If the
control module has any type of motion enable switch, turn it to
enable.
1) If the tractor does not work properly, proceed with step 2A.
2) If the tractor operates correctly, the accessory removed from the
accessory port is defective.
Faulty power entry
module.
1E
Remove the connector cover or any attached accessory from the
master drive accessory port (see Figure 2). Verify the power line
voltage is on the two outer pins of the three pin connector (see
Figure 2). The center pin is chassis ground.
NOTE:
INSTALL THE CONNECTOR COVER ON THE
ACCESSORY PORT AFTER COMPLETING THIS TEST.
FAILURE TO INSTALL THE COVER MAY CAUSE SERIOUS
INJURY FROM ACCIDENTAL ELECTRICAL SHOCK.
If the voltage is not present, rerun tests 1A, 1B, 1C, 1D and 1E. A
second failed 1E test indicates bad internal AC wiring or a defective
power entry module. Open the master drive case (see Figure 3).
Examine the AC wiring and rewire at fault or replace the power entry
module assembly.
NOTE:
The replacement power entry module is
provided with the accessory port’s three pin AC connector prewired.
Defective RFI filter.
1F
Disconnect the two RFI filter output wires (see Figure 1). Turn on
the main power. Verify the power line voltage exists on the two
output wires. Reconnect the wires. Replace the RFI filter if the
power line voltage is not present.
