Troubleshooting
MERGE 10-16
Chapter 10
2、 Choose wont type of SRO
3、 Interlock or direction switch
is open circuit
4、 Order delay is too short
20
CURRENT SENSE FAULT
Excitation currency sensor
failure
1、controller is broken
21
M- SHORTED
Inner M-is short circuit to B-
1、controller is broken
22
15 VOLT FAULT
15V voltage is out of range
1、 Controller is broken
2、 Seton of exterior circuit
23
DRIVER OVERCURRENT
Over currency on main
contactor or auxiliary one
1、 main contactor or auxiliary
contactor is short circuit
24
PRECHARGE FAULT
Inner voltage is too low
during start
1、 Controller is broken
2、 Out B- is short to B+ or leak
power
25
FIELD MISSING
Excitation damage
1、 Motor field cable come off
2、 Motor field cable is open
26
HW FAILSAFE
Automatic checking failure
1、controller is broken
Picture 1、1268 controller programmer faulty code table
二、LED failure diagnosis
There is LED on the controller，you can see it from the window on the top of controller cover.
When there is any fault on the controller or the input then it will display the failure indication code.
When it work , the LED will flicker steadily; if it inspect some failure, the dibit indicator will keep
flickering until the trouble was eliminated. Such as if the code“3、2” main contactor is welded, it
display as below.
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
(3,2) (3,2) (3,2)
Code list ：
LED code symbol description
LED all off No power or the controller was broken
All on ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ Problem one the micro processor in the
controller
1,1 ¤ ¤ Controller was broken
1,2 ¤ ¤¤ The sliding signal of accelerator is
outside the scope
To Next Page
