85
INVERTER TRACTION ALARMS
Alarm Cause Description and Solution
AL TR 8 WATCH DOG
Problem in the WATCHDOG electric circuit, which loses the ability to activate or inhibit system power. If motor phase continu-
ity is veri ed, the problem is related to the system logic (inverter) which must, therefore, be replaced.
AL TR 13 EEPROM KO
Problem with parameter memory. Try running a CLEAR EEPROM to restore it. If the operation is unsuccessful, replace the
damaged EEPROM.
AL TR 17 LOGIC FAILURE #3
Failure of hardware circuit that supervises and protects the system from overcurrent peaks by opening the three-phase brid-
ge. The problem is related to the system logic (inverter), which must, therefore, be replaced.
AL TR 18 LOGIC FAILURE #2
Failure of hardware circuit that guarantees sine wave timing. The problem is related to the system logic (inverter), which must,
therefore, be replaced.
AL TR 19 LOGIC FAILURE #1
Overvoltage or undervoltage signalled. Trips when the battery charge is excessively di erent (approx. + or - 20%) from the no-
minal value. In this case, you must identify and prevent the cause of the problem (generally, overvoltage is when regeneration
is too high, undervoltage is when the battery is too low). It is not related to the system.
AL TR 30 VMN LOW
Diagnosis at start-up that trips when the measured phase voltage is too low compared to the expected value. Make sure
the motor power cables are securely connected (a disconnected or poorly contacted phase causes errors). If the power con-
nections are in order, then the damage is likely related to the system power section and thus, it must be replaced.
AL TR 31 VMN HIGH
Similar to VMN LOW, this diagnosis trips when the measured phase voltage is too high compared to the expected value. Make
sure the motor power cables are securely connected, intact and not shorted. If the power connections are in order, then the
problem can be attributed to the system power section and thus, it must be replaced.
AL TR 37 CONTACTOR CLOSED
The general contactor power contact is closed even if its reel is not piloted. Make sure the contactor has not got stuck or
damaged and in the event, replace it.
AL TR 38 CONTACTOR OPEN
The general contactor power contact is closed even if its reel is being piloted. Make sure the reel wiring is not interrupted,
poorly wired or damaged in general. Replace it if necessary.
AL TR 49 I=0 EVER
When the motor is in movement, the system current sensor sees a zero piloting current. The sensor, therefore, is damaged
and the control must be replaced.
AL TR 53 STDBY I HIGH
Unlike the previous point, the piloting current is always high, even when it should be zero. If the error persists, the control is
damaged and must be replaced.
AL TR 60 CAPACITOR CHARGE
During the pre-charge stage (the one between switching on the key and closing the general contactor), the voltage at the
pre-charge condenser heads does not reach full capacity. Make sure there are no inductive charges parallel to the condensers
and that no problems intervene in the motor or system power section.
AL TR 61 HIGH TEMPERATURE
Warning indicating that the control temperature has exceeded the critical threshold (approximately 72°). The machine is
stopped to allow the control to cool down.
AL TR 65 MOTOR TEMPERATURE
Warning indicating that the motor temperature has exceeded the critical threshold (depends on the motor). The machine is
stopped to allow the motor to cool down.
AL TR 75 CONTACTOR DRIVER
The line contact reel power voltage is lower than expected. Make sure there the general contactor reel is not shorted. If the
error persists, the damage can be attributed to the system piloting circuit, which must, therefore, be replaced.
AL TR 76 COIL SHORTED
This is a diagnosis of the general contactor. If the general contactor reel is excited at start-up despite not being commanded,
then the general contactor opens and signals an error.
AL TR 78 VACC NOT OK
Trips 20" after the accelerator pedal is pressed if no gear is put in (that is, the pedal is pressed uselessly, in neutral gear or
without seat). Make sure the wire is not shorted.
AL TR 79 INCORRECT START
Warning indicating an incorrect machine start-up sequence. Repeat the correct sequence: Sit down properly + Put into Gear
+ Press accelerator pedal.
AL TR 80 FWD+BACK Warning signalling that the forward and backward gear have been requested simultaneously.
AL TR 86 PEDAL WIRE KO Accelerator potentiometer central unit interrupted. Check the accelerator pedal CPOT (potentiometer central unit).
AL TR 236 WRONG BATTERY TYPE
Wrong setting of the parameter SET BATTERY TYPE (menu ADJUSTMENT). It can occur only by setting 24V instead of 36V,
changing the already right default.
AL TR 237 -
Cannot occur while running (it is a warning that signals a manipulation of the SLIP parameters contained in the HARDWARE
SETTING menu).
AL TR 248 CAN BUS KO.
Interruption of communication via CAN. If the diagnosis occurs while assembling, verify that you have not swapped the
wiring of CAN H and CAN L; if the diagnosis occurs while running, check that the wires CAN H and CAN L are not interrupted.
AL TR 250 SENS MOTOR TEMP. KO
Motor temperature probe interrupted. You must make sure the wiring is not interrupted and, if necessary, replace the motor
thermal probe. This warning can appear both during testing and during machine use.
AL TR 251 HANDBRAKE
Warning indicating that the handbrake is engaged. This alarm does not impede operation; simply release the lever before
starting up the run sequence (sit down properly + put into gear + press accelerator pedal).
AL TR 253 ENCODER ERROR
Motor revolution sensor (encoder) interrupted. You must make sure the wiring is not interrupted and, if necessary, replace the
motor sensor. This warning can appear both in testing and during machine use. The system is unable to retroactively check
whether the set-point is consistent with machine behaviour and, therefore, inhibits vehicle operation.
AL TR 254 AUX OUTPUT KO
Failure of the drive piloting the auxiliary output, that is, the magnetic parking brake. Make sure there are no reel wiring pro-
blems that cause a false positive. If the brake is in order, replace the inverter.
NB: For information on the alarms, contact the Assistance Service.
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