Upright X Series, Service & Parts Manual

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Page 4-3
Troubleshooting
4.3 - Upright Motor Controller Diagnostics
X Series Work Platform
4.3 U
PRIGHT
M
OTOR
C
ONTROLLER
D
IAGNOSTICS
Batteries must be fully charged before troubleshooting.
Check/Repair all connections before replacing any components
Figure 4-2: Motor Controller
Table 4-1: LED Fault Codes
F
LASH
C
ODE
M
EANING
S
TATUS
C
ORRECTIVE
A
CTION
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 upper controls are affected, check/replace the control handle.
If lower 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.
M2 Terminal
LED Indicator
B- Terminal
060571-005