Taylor-Dunn MB-238-00, Operation, T Roubleshooting And Replacement Parts Manual

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Electrical Troubleshooting
Troubleshooting Page 26
Status LED Code Table
The status LED on the Sevcon power unit logic card can be used to give you an idea of where
the problem may be. It is recommended that you complete the troubleshooting procedure to
confirm failure of any component.
LED Status Light
Number
of
Flashe s
Fault Description Possible Cause Actions
1 Personality fault See dealer -
2 Sequence fault
Startup switches not
operated in the correct
order
Reset the switches
and start over (Refer
to Vehicle Operating
Instuctions))
3
MOSFET or motor
short
Burned Motor Repair as required
4
Contactor fault or
open motor
Contactor Failure
Open Circuit
Check contactor and
motor
5 Not used - -
6
Accelerator module
fault
FS-1 Micro Switch Failure
Faulty Wiring
Accelerator Failure
Check accelerator
module inputs
7 Discharged battery
Discharged battery or
loose connections
Check battery and
connections to
controller
8
Controller
overheated
Overloaded truck
Wait for controller to
cool
9 ISO coil shorted ISO Coil Short Circuit
Check coil continuity
and replace as
required
12 Can Buss Fault
Fault in the Wiring to the
dash display or a faulty
Dash Display
NOTE: The Dash Display is
Optional
Check wiring. If
vehicle is not
equipped with a
dash display, check
for debris in the 6-
pin connector on the
logic card