User manual

AE9ZP0BD - DUALAC2/&HP/POWER - User Manual Page - 83/89
A) the "Set steer 0 pos" (straight wheels programming) parameter is wrong
(lower than "Set steer min" or higher than "Set steer max").
B) the feedback signal of the steering potentiometer is outside the window
defined by "Set steer min" and "Set steer max" parameters.
In the first case, repeat the steering potentiometer acquisition. In the second
case, check the steering poti and its wiring. Eventually, repeat again the
steering potentiometer acquisition.
11) PEDAL WIRE KO
This alarm is signalled if a fault is detected in the accelerator unit wiring
(NPOT or PPOT cable is interrupted).
12) WRONG SET BATTERY
When the key is turned ON, the controller check the battery voltage and
compares it with the "SET BATTERY" parameter setting. If the actual value is
20% higher or lower than nominal value, the fault condition is entered.
Replace the battery with a correct battery.
13) SLAVE KO
Slave and Master µCs perform a cross-check in order to verify their
functionality. If the MASTER detects SLAVE µC malfunctioning, it brings the
controller in a safe status opening the power bridge and the Line Contactor.
14) MASTER KO
Slave and Master µCs perform a cross-check in order to verify their
functionality. There are two conditions under which slave enters this fault
condition:
A) the SLAVE µC receives incoherent can message from the MASTER µC
B) the SLAVE µC compares the inputs status and the related MASTER
operations, and find they are not coherent.
In both cases, the SLAVE brings the controller to a safe status opening the
power bridge and the Line contactor.
15) INPUT MISMATCH
Safety related inputs (Fw direction, Rev direction, accelerator ENABLE,
SEAT switch) are input to both microcontrollers by independent hw circuit.
The two µCs read these inputs and compare by exchanging related status on
the canbus. If the SLAVE µC finds a mismatch between its inputs and
MASTER inputs, it brings the controller to a safe status opening the power
bridge and the Line contactor.
16) AUX OUTPUT KO
The µP checks the driver of the electromechanical brake coil. If the status of
the driver output does not correspond to the signal coming from the µP, the
alarm is signalled. It is suggested to preliminary check if there is an external
short or low impedance pull-down between NAUX (C31) and -BATT. If no
external cause can be found, replace the logic card.
17) EEPROM KO
Fault in the area of memory in which the adjustment parameters are stored;
this alarm does not inhibits truck operation, but the controller will use default
parameters. If the defect persists when the key is switched OFF and ON
again, replace the logic. If the alarm disappears, remember that the
parameters stored previously have been cancelled and replaced by the
default values.
18) HIGH TEMPERATURE
Master or Slave or both temperatures are greater than 75°C. The maximum
current is reduced proportionally to the temperature increase. At 100°C the
max current of both inverter is reduced to zero.
If the alarm is signalled when the controller is cold:
A) thermal sensor failure;
B) failure in the logic card.