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output of micro-controller is damaged. The above two
cases has nothing to do with external parts, so change the
controller.
When tiller input switch is off, about 30S later, the main
contactor will be off and warning is given. The warning
disappears for next operation.
When the safety input switch is off, so is the main
contactor, meanwhile the electromagnetic brake or
auxiliary output coil is driven. Check if the port of A11 is
correctly connected. Change the controller if other parts
are correct.
Coil short
circuit of
main
contactor
CAUSE: When the short circuit coil of main contactor is
connected to the output port of CAN#16, the fault signal
is produced. After overload is removed, it automatically
withdraw from fault state through releasing brake and
then the running instruction is valid.
Fault analysis：Generally, the fault code indicates that the
trouble is on the harness or loading coil. So check the
connection between controller output and load first. If
there is no trouble of external load, the trouble is inside
the controller and the controller needs to be changed.
Fault of coil
protection
circuit
Short circuit fault of the coil protection circuit used to
drive main contactor, electromagnetic brake or auxiliary
devices
Fault analysis: Change the controller
Short circuit
of key switch
At start-up stage, if controller detects that there is low
logic level signal when key switch is off, there is a fault.
Fault analysis: Most possibly is that the voltage is
excessively low, suggest to check the followings :
(1) If the key switch is based on external load (e.g. the
starting of DC-DC converter, the input signal of relay or
contactor switch is lower than starting voltage).
(2) Check the positive and negative poles of power cable
and cell end and the connection between –BATT and
+BATT of main contactor and controller. It must be
connected with screw and the torsion scope is
13NM~15NM..
(3) If no voltage drop has been detected on the power
supply line, the fault signal is produced every time when
the key switch is on. The fault may be possibly in the
hardware of the controller; therefore, the controller needs
to be changed.
Short circuit
of power
MOS
Software will check the power bridge before main
contactor is closed: It converts into low-end power of
MOS and the phase voltage value drops to –BATT (rise to
+BATT). If the change of phase voltage value does not
conform to the instruction, this fault signal is produced.
Change the controller.
Fault of
handbrake
switch
Handbrake input signal is valid when the running
instruction is issued.
Resolution：Possible causes for the fault :
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