Troubleshooting guide, cont’d – BUG-O Systems Modular Drive System User Manual

Page 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.

Turn ON the main ON/OFF switch located in the power entry

module. (see Figure 1)

No power to

machine.

Verify the power cord is OK and the correct voltage exists at the

outlet.

Blown fuse.

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.

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.

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.

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.