Upright TM12 Service & Parts Manual

Page 4-5
Troubleshooting 4.3 - UpRight Motor Controller Diagnostics
TM12 Work Platform - European
4.3 U
P
R
IGHT
M
OTOR
C
ONTROLLER
D
IAGNOSTICS
Batteries must be fully charged before troubleshooting.
Check/Repair all connections before replacing any components
Table 4-2:
Motor Controller Diagnostics
Flash Code Meaning Status Corrective Action
LED on
Power to the controller and the
controller is operational.
System is functional None.
LED off
No power to the controller, or
internal fault in the controller.
Battery cables not connected properly;
Failed controller
Check battery cable connections.
Replace the controller.
2 Flash Procedural fault.
Lift, drive, or steer switch is engaged at
startup; Drive/Lift Switch rotated while
operating
Cycle the control handle through neutral to clear fault.
3Flash
Controller senses B- at the M2
terminal.
Short circuit at the motor; M2 cable in
contact with B- cable; Short circuit within
controller
Check cable routing and connections.
Test terminals for source of B-.
Replace the controller
4Flash
Controller senses B+ at the M2
terminal before engaging the
motor start relay.
B+ cable routed incorrectly; M2 cable
making contact with B+ cable; Motor
start relay contacts welded closed.
Check cable routing and connections.
Test terminals for source of B+.
Replace the motor start relay.
5Flash
Controller senses open circuit at
M2 after engaging the motor start
terminal.
Cables loose or not connected; Faulty
motor start relay
Check the cable routing and connections.
Check the signal from motor controller to relay.
Check/replace the motor start relay.
6Flash
Faulty signal from control handle
or I/O board.
Faulty control handle; Wiring error
If upper controls are affected, check/replace the control handle.
If lower controls are affected, check/replace the I/O board.
7Flash
Battery voltage below 12V or
above 45V.
Dead batteries; Bad cable connections Check batteries and cable connections.
8 Flash Thermal cut-off.
Controller is overheated due to overuse
or other failure
Allow system to cool.
Locate and repair other source of overheat.
LED Indicator
M2 Terminal
B- Terminal

Upright TM12 Specifications

General

Brand	Upright
Model	TM12
Category	Lifting Systems
Language	English