2-7
Know your Tow Tractor
Hour-meter Memory Service
The MDI-CAN indicator retains the Hour Meter value in its own
memory (EEPROM). In this way it is possible to transfer the
machine hour meter value into other controllers, if a replace-
ment is required, without loss of the hour meter record for a
particular machine.
This can achieved as follows:
With the key Switch open, connect the ZAPI Console to
controller.
Close the key Switch. Set the function "LOAD HM FROM
MDI" to ON. This can be found in the ADJUSTMENTS
Menu. In some versions, this function may be called "AUX
FUNCTION1".
Open and close the key Switch.
The replacement controller will now receive and retain the
machine hour meter value of the previous controller.
It has to be considered that:
On default, the parameter "LOAD HM FROM MDI" is set
to OFF. Therefore if this type of function is not activated as
described above, the memory of the hour-meter will be
lost at turn on.
To avoid this situation, if the operator forgets to set param-
eter, the MDI-CAN signals the alarm "A98" for 1 minute
(during this time traction is disabled).
This alarm warns the operator of the imminent cancella-
tion of the hour meter memory. After 1 minute, if the oper-
ator has not intervened, the hour meter of the MDI-CAN
will be re-written, with the hour meter value of the new
controller (Zero Hours if the controller is new).
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