Page - 68/81
AFCZP0BC- COMBIACX & ACEX - User Manual
Cause:
This alarm occurs when the A/D conversion of the analog inputs gives frozen
value, on all of the converted signals, for more than 400msec. The goal of this
diagnosis is to detect a failure of the A/D converter or a problem in the code flow
that omits the refreshing of the analog signal conversion.
Troubleshooting:
If the problem occurs permanently it is necessary to substitute the controller.
19) “ENCODER ERROR”
Cause:
This fault is signalled in following conditions: the frequency supplied to the motor
is higher than 40 Hz and the signal feedback from the encoder has a jump
higher than 40 Hz in few tens mSec. This condition is related to a malfunctioning
of the encoder.
Troubleshooting:
A) Check both the electric and the mechanical encoder functionality, the wires
crimping.
B) Check the encoder mechanical installation, if the encoder slips inside its
compartment raising this alarm condition.
C) Also the electromagnetic noise on the sensor bearing can be a cause for the
alarm. In these cases try to replace the encoder.
D) If the problem is still present after replacing the encoder, the failure is in the
controller.
20) “TILLER ERROR”
Cause:
Mismatch between the H&S input and the tiller input.
Troubleshooting:
Check the harness related to CAN#1 and CAN#29 with a voltmeter. If the state
of these inputs is right, then it could be a problem inside the controller, which
has to be changed.
21) “WATCHDOG”
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.
22) “SMART DRIVER KO”
Cause:
The built in smart driver is open, not able to provide the electro mechanic brake
positive.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if the Smart driver
output CNB#1 is shorted to –Batt.
B) If, even disconnecting the wire from the connector pin, the output stays at
low value, the problem is inside the controller and the Smart Driver is
probably damaged.
23) “KEYOFF SHORTED”
Cause:
Summary of Contents for ACEX
Page 27: ...AFCZP0BC COMBIACX ACEX User Manual Page 27 81 8 DRAWINGS 8 1 Mechanical drawing COMBIACX...
Page 28: ...Page 28 81 AFCZP0BC COMBIACX ACEX User Manual 8 2 Mechanical drawing ACEX...
Page 29: ...AFCZP0BC COMBIACX ACEX User Manual Page 29 81 8 3 Connection drawing COMBIACX...
Page 30: ...Page 30 81 AFCZP0BC COMBIACX ACEX User Manual 8 4 Connection drawing ACEX...
