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8 VFIELD NOT OK
AL 15 MDI
This test is made at standby with the Line Contactor open. In this condition the
voltages on both the connections of field must be to around ½ VBatt. This alarm is
generated if the field voltage is different from this value. Possible causes:
d) Frame fault on the motor to chassis;
e) Incorrect connection of the field winding to the controller;
f) Failure of the controller in the section relative to the field.
9 VACC NOT OK
AL 72 MDI
This Alarm is generated if the accelerator output voltage differs more than 2V from
the acquired minimum during the PROGRAM VACC. Possible causes:
a) the track of the potentiometer has become open.
b) the potentiometer is not wired correctly.
c) the potentiometer itself is defective.
d) the values set in PROGRAM VACC routine have not remained or made
correctly.
10 PEDAL WIRE KO
AL 86 MDI
This Alarm is generated if potentiometer or wiring fault is detected. (NPOT or PPOT
are open circuit).
11 FWD HIGH FIELD CURR
(AL 90 MDI)
, BWD HIGH FIELD CURR
(AL 91 MDI)
, NO
FIELD CURR
(AL 58 MDI)
Problem detected with the field winding current. Possible causes:
a) Failure of the field current sensor.
b) Field cables not connected or incorrectly connected.
c) Failure of the Field Power Unit.
12 STBY I HIGH
AL 53 MDI
This test is made during the initial diagnosis and at standby. The test verifies that
the current is zero. This Alarm disables the machine. Possible causes:
a) defective current sensor.
b) logic failure. First replace the logic. If fault remains replace the power unit.
13 I = 0 EVER
AL 49 MDI
This check is made during travel. If the current is not higher than a preset minimum
value, this Alarm is generated and the machine disabled. Possible causes: see
STBY I HIGH. Check the motor armature (brush connections).
14 CONTACTOR DRIVER
(AL 75 MDI)
, DRIVER SHORTED
(AL 74 MDI)
These Alarms are generated if there is a problem with the Line Contactor. Possible
causes:
a) The Contactor Coil Driver is short-circuit.
b) Defect in the wiring to the contactor, or logic failure.
