Led Fault Codes - Upright TM12 Service Manual

LED Fault Codes

3-6 LED F
AULT
Batteries must be fully charged before troubleshooting.
Check/Repair all connections before replacing any components
NOTE: Before dip switch settings will take effect, power must be disconnected or Emergency Stop switches must be
depressed.
Table 3-1: LED Fault Codes
Flash Code Meaning
Power to the controller and the
LED on
controller is operational.
No power to the controller, or
LED off
internal fault in the controller.
2 Flash Procedural fault.
Controller senses B– at the M2
3 Flash
terminal.
Controller senses B+ at the M2
4 Flash terminal before engaging the
Motor Start relay.
Controller senses open circuit at
5 Flash M2 after engaging the Motor Start
terminal.
Faulty signal from Control Handle
6 Flash
or I/O board.
Battery voltage below 12V or
7 Flash
above 45V.
8 Flash Thermal cut-off.
Page 3-6
C
ODES
LED Indicator
B+ Terminal
Status
System is functional
Battery cables not connected
properly; Failed controller
Lift, drive, or steer switch is
engaged at start-up; Drive/Lift
switch rotated while operating
Short circuit at the motor; M2
cable in contact with B– cable;
Short circuit within controller
B+ cable routed incorrectly; M2
cable making contact with B+
cable; Motor Start relay contacts
welded closed.
Cables loose or not connected;
Faulty Motor Start relay
Faulty Control Handle; Wiring
error
Dead batteries; Bad cable
connections
Controller is overheated due to
overuse or other failure
B– Terminal
Corrective Action
None.
Check battery cable connections.
Replace the controller.
Cycle the Control Handle through neutral to clear fault.
Check cable routing and connections.
Test terminals for source of B– .
Replace the controller
Check cable routing and connections.
Test terminals for source of B+.
Replace the Motor Start relay.
Check the cable routing and connections.
Check the signal from Motor Controller to relay.
Check/replace the Motor Start relay.
If Platform Controls are affected, check/replace the Control Handle.
If Chassis Controls are affected, check/replace the I/O board.
Check batteries and cable connections.
Allow system to cool.
Locate and repair other source of overheat.
107099-002 TM12 Work Platform
Section 3 - Troubleshooting
Figure 3-4: Motor Controller
M2 Terminal