4-62
I/O BOARD
Concerning this session, in the “Condition for error detection” description, if not expressly specified, the
wording "logic unit" refers to the I/O CONTROL BOARD.
E1 PUMP INCORRECT START
Condition for error detection
Incorrect starting procedure.
One of the switches of the oil control valve has been activated before turning on truck.
• Check:all the switches of the oil control valve
• Check the correct setting of the microswitches
• See chapter 2 “ADJUSTING THE LIFTING POTENTIOMETERS”
E2 BAD LIFT POT
Condition for error detection
Failure on the lifting potentiometer in the oil control valve.
The alarm appears if, before closing the lifting micro, the tension of the potentiometer increases of 0.78 V
as regards the value stored during the regulations
Check:
• repeat the lifting potentiometer acquisition
• the adjustment and the installation of the potentiometer
• wiring loom
• the variable resistance of the potentiometer cursor using an analogic multimeter
• replace the potentiometer
See chapter 2 “ADJUSTING THE LIFTING POTENTIOMETERS”
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