Taylor-Dunn AMB Ambulance, Operation, T Roubleshooting And Replacement Parts Manual

Page: 174 / 266

Motor Controller
Page 2
INSPECT
Receptacles
The inside of each receptacle should be clean and free
of any debris. Use aerosol electrical cleaner if required.
Base Plate
The base plate should be flat. If required, sand with 150
wet sandpaper to remove any raised areas.
Terminal Ends
The wire insulation at each terminal should be smooth
and free of any sign of heat. Any indication of heat is a
result of a loose connection at the terminal. This could
have been a loose bolt or a faulty crimp. It is recommend
to replace the cable terminal end.
Note: A loose bolt could result in damaging the
terminal crimp.
’R’ Terminal
Inspect the controller cover around the ‘R’ terminal. If the
cover has melted around the stud, it is an indication that
the vehicle was towed while the start switch was ON. The
controller may be damaged due to the excessive current
flowing through the ‘R’ terminal.
REMOVE/INSTALL
It may be required to remove the control panel from the
vehicle for this procedure.
Remove
6:
While holding the wires so that they do not rotate,
remove the terminal bolts.
7: Disconnect the logic connector.
8: Disconnect the can-bus connector.
9:
Remove the four bolts holding the controller to
the panel and remove the controller.
Note: If a heat sink is installed, then these bolts
may also hold the heat sink to the panel.
Install
1: Thoroughly clean the controller base, mounting
plate, and heat sink.
2: Apply thermal transfer compound to the controller
base and heat sink.
3:
Install the controller to the mounting plate.
4:
Attach the wires to the studs and torque per
specification listed in the table at the end of this
section.
Note: DO NOT allow the wires to rotate while
torquing the bolts (see notice above).
5: Install silicon dielectric grease (94-422-10, 5.3
ounce tube) into the two logic receptacles and
reconnect the harnesses.
6:
Reconnect the batteries and test drive.
Do not allow the wires to rotate while removing
terminal hardware.
Internal electrical connection will be damaged if the
terminal stud rotates.
NOTICE
Turn the start switch off BEFORE disconnecting the
batteries. Disconnecting power from the controller
while it is ON may corrupt the controller programming
resulting in a fault 1.
NOTICE
These motor controls are programmed to match the
vehicle configuration.
DO NOT move a control to another vehicle unless the
vehicle configurations are identical.
Any changes to the vehicle configuration may require
reprogramming the controller.
Installing a controller that is not programmed
correctly may result in damage to the controller or
electrical system.
NOTICE
1) Place the Forward/Reverse switch in the center
“OFF” position (neutral).
2) Turn the Start switch OFF.
3) Set the park brake.
4) Place blocks under the front or rear wheels to
prevent vehicle movement.
5) Disconnect the battery main positive and negative
cables or disconnect the main battery plug.
WARNING