EP Equipment CPD30L1-B, Service Manual

Page: 165 / 235

REV. 05/2020
ELECTRICAL SYSTEM
9
153
Error Message
Possible cause Fault elimination
Error
Error text
210
WRONG RAM
MEM. 05
The algorithm implemented to
check the main RAM registers
finds wrong contents: the register
is “dirty”. This alarm inhibits the
machine operations.
Try to switch the key off and
then on again, if the alarm is still
present replace the logic board.
202
VDC LINK
OVERV.
This fault is displayed when the
controller detects an overvoltage
condition.
Overvoltage threshold is 65 V for
36/48V controllers and 116 V for
80V controllers.
As soon as the fault occurs,
power bridge and MC are opened.
The condition is triggered using
the same HW interrupt used for
undervoltage detection, uC discerns
between the two evaluating the
voltage present across DC-link
capacitors:
- High voltage Overvoltage
condition
- Low/normal voltage Undervoltage
condition
If the alarm happens during the
brake release, check the line
contactor contact and the battery
power-cable connection.
201
WRONG ENC
SET
Mismatch between “ENCODER
PULSES 1” parameter and
“ENCODER PULSES 2” parameter
Set the two parameters with the
same value, according to the
adopted encoder.
237 ANALOG INPUT
This alarm occurs when the A/
D conversion of the analog inputs
returns frozen values, on all the
converted signals, for more than
400 ms. The goal of this diagnosis
is to detect a failure in the A/D
converter or a problem in the code
flow that skips the refresh of the
analog signal conversion.
If the problem occurs permanently
it is necessary to replace the logic
board.