Sevcon Troubleshooting
Page 21
Electrical Troubleshooting
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.
Number
of
Flashes
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
Summary of Contents for TT-316-36
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Page 6: ...TAYLOR DUNN...
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Page 99: ...Sevcon Troubleshooting Page 3 Electrical Troubleshooting Identifying Your Controller...
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Page 134: ...TAYLOR DUNN...
Page 138: ...Illustrated Parts Page 2 Front Fork...
Page 140: ...Illustrated Parts Page 4 Front Brakes...
Page 142: ...Illustrated Parts Page 6 Tilt Steering Column and Gear...
Page 146: ...Illustrated Parts Page 10 Transmission Differential Case Rear Axle...
Page 148: ...Illustrated Parts Page 12 Rear Brakes Master Cylinder 8 Brake Body...
Page 150: ...Illustrated Parts Page 14 Rear Suspension...
Page 152: ...Illustrated Parts Page 16 Motor...
Page 156: ...Illustrated Parts Page 20 Brake Lines...
Page 158: ...Illustrated Parts Page 22 Wheels and Tires Ref wheel hub 1 2 5 assembly 4 3 6 7 8 9 10...
Page 164: ...Illustrated Parts Page 28 Miscellaneous Frame and Body...
Page 168: ...Illustrated Parts Page 32 Decals...
Page 172: ...TAYLOR DUNN...