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6.1 ANALYSIS OF ALARMS DISPLAYED ON THE CONSOLE
1 WATCH DOG
AL 8 MDI
The test is executed at the key turn-on, at the stand-by and on running. Possible
causes:
a) Watch-dog hardware circuit not OK;
b) Software not OK.
2 EEPROM KO
AL 13 MDI
Fault in the area of memory where the adjustment parameters are stored. This
Alarm inhibits machine operation. If the fault continues when the Key Switch is re-
cycled, replace the logic. If the fault disappears, the previously stored Parameters
will have been replaced by the default parameters.
3 CHECK UP NEEDED
AL 99 MDI
The "check up type" parameter is active and the time from last check up is > 300
hours.
4 INCORRECT START
AL 79 MDI
Alarm generated by an incorrect Starting Sequence. Possible causes:
a) The TILLER microswitch is stuck or failed.
b) Error in the starting sequence from the operator.
c) Error in the wiring.
5 FORW + BACK
AL 80 MDI
This check is made continually. The alarm is generated when forward and reverse
direction are requested simultaneously. Possible causes:
a) Error in Wiring.
b) Welding or Failure of a direction switch.
c) Error in the starting sequence from the operator.
6 CAPACITOR CHARGE
AL 60 MDI
This check is made during the initial diagnosis. This Alarm is generated if the
Capacitors are not charged within 500ms after the Key Switch is closed. Probable
cause is failure inside the power block.
7 VMN NOT OK
AL 32 MDI
This test is performed at rest, with the general Contactor Closed, and also during
operation. At rest if VMN is lower than battery voltage this Alarm is generated.
During operation this Alarm is generated if VMN doesn’t follow the duty-cycle of the
chopper. Possible causes:
a) Incorrect Motor connection.
b) Short circuit motor windings to chassis.
c) Defect in the power unit.
