Skyjack SJ12 E Service Manual page 137

Display Module
Code Description
202-CTRL ERR VDC LIN OVERV.
206-CTRL ERR INIT VMN HIGH
207-CTRL ERR INIT VMN LOW
208-CTRL ERR EEPROM KO
209-CTRL ERR PARAM RESTORE
WRONG RAM
210-CTRL ERR
MEM.
SJ12 E, SJ16 E, SJ20 E
Cause
This fault is displayed when the controller
detects an overvoltage condition.
Overvoltage threshold depends on the
nominal voltage of the controller.
Nominal voltage 24 V, overvoltage
threshold 35 V.
As soon as the fault occurs, power
bridge and MC are opened. The
condition is triggered using the same
W interrupt used for under- voltage
detection, microcontroller discerns
between the two evaluating the voltage
present across DC-link capacitors:
Before closing the LC, the software
checks the power bridge voltage without
driving it. The software expects the
voltage to be in a "steady state" value.
If it is too high, this alarm occurs. The
hexadecimal value "XX" identifies the
faulty phase:
81: phase U
82: phase V
83: phase W
Before closing the LC, the software
checks the power bridge voltage without
driving it. The software expects the
voltage to be in a "steady state" value.
If it is too low, this alarm occurs. The
hexadecimal value "XX" identifies the
faulty phase:
01: phase U
02: phase V
03: phase W
A HW or SW defect of the non-volatile
embedded memory storing the controller
parameters. This alarm does not inhibit
the machine operations, but it makes the
truck to work with the default values
The controller has restored the default
settings. If a CLEAR EEPROM has been
made before the last key re-cycle, this
warning informs you that EEPROM was
correctly cleared.
The algorithm implemented to check
the master RAM registers finds wrong
contents: the register is "dirty". This
alarm inhibits the machine operations.
Section 5 – Procedures
Troubleshooting
If the alarm happens during the brake
release, check the line contactor
contact and the battery power cable
connection. Monitor the BATTERY
VOLTAGE reading by the TESTER
function, check it matches with the
voltage across +B and -B terminals.
If no problem can be found, replace
the controller.
Check the power cables
Check the impedance between U, V
and W terminals and -B terminal of
the controller.
Check the motor leakage to truck
frame.
If the motor connections are OK and
there are no external low impedance
paths, the problem is within the
controller. Replace it.
Check the motor power cables.
Check the impedance between U, V
and W terminals and -B terminal of
the controller.
Check the motor leakage to truck
frame.
If the motor connections are OK and
there are no external low impedance
paths, the problem is within the
controller. Replace it.
Execute a CLEAR EEPROM
procedure. Switch the key off and
on to check the result. If the alarm
occurs permanently, it is necessary
to replace the controller. If the alarm
disappears, the previously stored
parameters will be replaced by the
default parameters.
A travel demand or a pump request
does cancel the alarm. If the alarm
appears at key-on without any
CLEAR EEPROM performed, replace
the controller.
Try to switch the key off and then
on again, if the alarm is still present
replace the logic board.
241914ACA
137