HELI CPD15, Operation & Service Manual

Page: 49 / 90

47
NODE node signal signal that the other controller can not make normal
communication and the controller always is always in the
waiting state until CAN communication network is
completely normal. Check why the wiring of the modules
that fails to communicate is abnormal and see if the
software edition or parameter setting is correct.
223
WATCHDOG
#1
Watchdog
fault 1
During startup, watchdog circuit is activated before
software is started. The watchdog signal is invalid in
standby or operation state( alarm state)
Fault analysis
：
Hardware circuit of watchdog or output of
micro-controller is damaged. The above two cases have
nothing to do with external parts, so change the controller.
224
COIL
SHORTED EF
Short circuit
of auxiliary
coil
When the electromagnetic brake connecting to the output
terminal of CNA#18IS or auxiliary coil is shorted, the
fault signal is produced. Withdraw from the fault state
through releasing brake after eliminating the overload
condition so that the running request 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.
227
WATCHDOG
#2
Watchdog
fault 2
Cause
：
During startup, the watchdog circuit is activated
before software is started. The watchdog signal is invalid
(alarm state)in case of standby or operation state.
Fault analysis: The hardware circuit of watchdog or
output of micro-controller is damaged. The above two
cases has nothing to do with external parts, so change the
controller.
228 TILLER OPEN
TILLE
off
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.
229
SAFETY
INPUT
Safety Input
fault
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.
230
COIL
SHORTED MC
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.
231
COIL
SHORTED HW
KO
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