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H2B USER'S MANUAL - 550145G
5) VMN LOW
The test is carried out at standby and in running up to 80% of PWM. If the VMN voltage
is lower than 1/3 of the battery voltage, an alarm is shown.
For finding out the causes follows the diagnosis procedure herefollowing:
CONDITIONS
UNDER WHICH
FAULTS IS
DETECTED
1° TEST
RESULT
2° TEST
RESULT
3° TEST
RESULT
FAULT
DESCRIPTION
POINT:
AT THE KEY ON
DISCONNECT THE
MOTOR CABLE
CONNECTED TO
VMN BAR AND
THEN VERIFY IF
THE ALARM STILL
PRESENT
YES
=>
=>
=>
=>
C5
NO
A RUNNING
CONTACTOR IS
LOCKED IN
WORKING
POSITION
YES
THE STUCK
CONTACTOR COIL
IS SUPPLIED?
YES
B7
NO
B8
NO
D1
D2
D3
RUNNING WITH
CONTACTORS ON
RUNNING
POSITIONS
=>
=>
=>
=>
=>
=>
C5
AS SOON AS THE
ACCELERATOR
PEDAL IS
COMPLETLY
RELEASED FOR
DOING A RELEASE
BRAKING
IS IT PRESENT THE
BYPASS OR THE
WEAKENING
CONTACTOR?
YES
=>
=>
=>
=>
E1
NO
=>
=>
=>
=>
C5
B7) If the running contactor remains stuck, you can verify:
1)
if the wire going from NTA to NTI 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.
