LED Fault Codes Section 3 - Troubleshooting
Page 3-6 113101-000 MX15 / MX19 | Service Manual
3-6 LED F
AULT
C
ODES
Batteries must be fully charged before troubleshooting.
Check/Repair all connections before replacing any components
Figure 3-4:
Motor Controller Connections
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
M2 Terminal LED IndicatorB+ TerminalB– Terminal
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 start-up
• Drive/Lift switch rotated while operating
• Cycle the Control Handle through neutral to clear fault.
3 Flash
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
4 Flash
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.
5 Flash
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.
6 Flash
Faulty signal from Control
Handle or I/O board.
• Faulty Control Handle
• Wiring error
• If Platform Controls are affected, check/replace the Control Handle.
• If Chassis Controls are affected, check/replace the I/O board.
7 Flash
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.
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