48
MicroController Control System
Testing And Adjusting
It may be due to 1 of following causes of motor
connecting interruption:
a) brushes lift up from collector (fig.1).
b) brushes’ cable burn up (fig. 2).
c) Interruption either on motor winding or on motor
itself cabling.
B1) FWD CTR is supplied with a correct voltage
but it doesn't close.
Possible cause:
1) Contactor coil is interrupted, verify its
resistance using an ohmmeter.
2) Contact can't move due to mechanic block.
3) Nominal working coil voltage is greater than
battey one.
B2) REV CTR is supplied with a correct voltage but
it doesn't close; everything said at point B1 for
FWD CTR is valid here.
B3) Backward and forward contactor are supplied
with a correct voltage but they don't close; see
point B1.
C1) Supply don't come up to FWD CTR, please
check cabling and connections of FWD CTR
coil connectors.
C2) Supply don't come up to REV CTR, please
check cabling and connections of REV CTR
coil connectors.
C3) Supply don't come up to FWD CTR and REV
CTR, please check cabling and connections of
the all coil connectors.
- For points C1, C2, C3 replacing controller may be
necessary
For H2B standard configuration the solutions at
point A1-A2-A3-B1-B2-B3-C1-C2-C3 are valid; for
the last two points please respect the different
connections rather than the regenerative configuration.
3) BRAKE CONT. OPEN
Test carried out during the passage to running.
After closure of the running contact, the braking
contactor loses, verifying that the VMN goes
from < 1/3 to > 2/3. If this does not occur, an alarm
is shown.
A4) There is not a good contact on the NO of
REGEN CTR, clean the contact, if it is too
much damaged replace the contactor.
B4) Replace the contactor coil or the complete
contactor.
B5) Contactor mechanically locked, unlock it and
replace it.
B6) Contactor with working nominal voltage bigger
than the feeding one.
C4) Supply doesn’t come up to the contactor coil,
please check the cabling and the connections
of the coil connector.
4) DIR.CON.CLOSED
Test carried out during the passage to standby or
braking.
Checks that the running contactor opens by
comparing the consistent status of the VMN
potential. Possible causes:
a) Running contactor stuck or slow to open.
b) Logic failure.
5) VMN LOW
The test is carried out at standby and in running up
to 80% of PWN. If the VMN voltage is lower than
1/3 of the battery voltage, an alarm is shown.
B7) If the running contactor remains stuck, you can
verify:
1) if the wire for direction contactor coil is
casually in short with a metallic part
connected to the battery negative;
2) disconnecting the contactor wire always
excited from board connector if the contactor
is no longer excited, replace the logic board.
B8) A running contactor is stuck on working
position, unlock the contact, it could be possible
to replace the contactor.
D1) Wrong connections of the motor cables.
The stator and the armature are crossed.
D2) There is a current dispersion in the motor
between the stator winding and the armature
one otherwise there some electric parts of these
windings that makes a contact inside the motor.
Содержание B20S-3
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