Drive Controllers; Sevcon Controller (Diagnostic Led) - HAKO Hakomatic B 1100 Service Booklet

9. Drive Controller

9.1 SEVCON Controller (Diagnostic LED)

The light-emitting diodes (LED) are directly located on the electronics
LED indication
OFF
ON
2 signals
3 signals
Malfunction
Drive controller
without function
Drive controller is
operable
Wrong start sequence
Output transistors
do not connect or
no connection to
drive motor
Remark
Voltage supply interrupted
Check fuses and wiring
Drive controller function
okay
Check accelerator and direction
switch as well as cabling
Check wiring to drive motor;
check carbon brushes;
if okay but error still present
replace drive controller
Foil 55