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8. DIAGNOSTIC FAULT CODES
Code
Alarm
6
SERIAL ERR#1
8
WATCHDOG
13
EEPROM KO
16
LOGIC FAILURE
#4
17
LOGIC FAILURE
#3
Pump
EPS
Traction
(P)
(E)
(T)
Description
Main uC and Slave uC communicate via a local serial
interface. This alarm occurs when the slave uC does not
receive the communication from the main uC through
this serial interface. It is necessary to replace the
controller.
Cause :
This is a safety related test. It is a self diagnosis test
within the logic. The watch dog circuit is composed by
two monostable multivibrators so there is a double check
of software execution.
Troubleshooting :
This alarm could be caused by an hardware failure in
one of two (or both) multivibrator or due to a software
execution problem. For both cases it is an internal fault of
the controller which must be replaced.
Cause :
It's due to a HW or SW defect of the non-volatile
embedded memory supporting the controller
parameters. This alarm does not inhibit the machine
operations, but the truck will work with the default values.
Troubleshooting :
Try to execute a CLEAR EEPROM operation (refer to
console manual).
Switch the key off and on to check the result. If the alarm
occurs permanently, it is necessary to replace the
controller. If the alarm disappears, the previously stored
parameters will have been replaced by the default
parameters.
Fault in the area of memory in which the adjustment
parameters are stored; this alarm inhibits machine
operation. If the defect persists when the key is switched
OFF and ON again, replace the logic. If the alarm
disappears, remember that the parameters stored
previously have been cancelled and replaced by the
default values.
This alarm occurs in the rest state if the output of the
voltage amplifier of the phase Vw-Vv have a drift larger
than
0.25 V. It is necessary to replace the controller.
Cause :
Hardware problem in the logic card circuit for high
current (overload) protection.
Troubleshooting :
This type of fault is not related to external components,
so, when it is present it is necessary to replace the
controller.
7-67
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