S31EUK4090SY(2)99-01
The machine has many safety functions.
The intervention of the safety devices is
monitored on the display of the control panel by
means of suitable safety codes; this is a help for
the identification of the malfunctions and the
possiblòe repair intervention.
The safety codes are listed in the following table.
SAFETY FEATURES AND TROUBLE
SHOOTING
31
SAFETY
CODE
TROUBLE DESCRIPTION / BEHAVIOUR
OF THE MACHINE
CHECK AND REPAIR
3_00
Traction motor overtemperature (85 °C); the machine is still
working
Check the opearation and cleaning of the front electric brake
3_01
Safety stop of the machine due to traction motor
overtemperature (95 °C)
1- check the opearation and cleaning of the front electric
brake
2- If brake is regular call for service assistance
3_02
Possible failure of the electronic control of traction motor
1- check the traction motor operation, carbon brushes and its
four connection cables too
2- if the traction motor and relevant connections are regular
ask for replacement of the power electronic board
3_03
Traction motor overload
If you are running on a ramp it could be a normal behaviour;
if the code is persistent make the same checks as per code
3_01
3_04
Overtemperature (85 °C) of the electronic control of traction
motor: 1st alert
If the ambient temperature is higher than 35 °C or if the
machine is running on a ramp it could be normal; otherwise
check the front electric brake
3_05
Overtemperature (95 °C) of the electronic control of traction
motor: 2nd alert
If the ambient temperature is higher than 35 °C or if the
machine is running on a ramp it could be normal; otherwise
check the front electric brake
3_06
Safety stop of the machine due to overtemperature (105 °C)
of the electronic control of traction motor
1- Let the machine cool 30 minutes
2- check the opearation and cleaning of the front electric
brake
3- If brake is regular call for service assistance
3_07
Accelerator pedal not in the neutral position at key switch On
1- check the operation of the accelerator pedal and
microswitch
2- check and replace - if necessary - the pedal potentiometer
or microswitch
3_08
Broken accelerator potentiometer cable
1- check and repair cable
2- if cables are regular replace the pedal potentiometer
4_02
Possible failure of the electronic control of brush motors
1- check the brush motors operation, carbon brushes and
connection cables too
2- if the brush motors are regular ask for replacement of the
power electronic board
4_03
Brush motors overload
1- reduce the brush pressure
2- if the code is persistent check the brush motors operation
or call for service assistance
4_04
Overtemperature (85 °C) of the electronic control of brush
motors: 1st alert
Reduce the brush pressure
4_05
Overtemperature (95 °C) of the electronic control of brush
motors: 2nd alert
Reduce the brush pressure
4_06
Safety stop of the machine due to overtemperature (105 °C)
of the electronic control of brush motors
1- reduce the brush pressure and let the machine cool 30
minutes
2- if the code is persistent check the brush motors operation
or call for service assistance
6_02
Failure of the brush lifting system
1- check the operation of the brush lifting system (jack motor
and two microswitches)
2- If fuses, jack motor and microswitches are regular replace
the microprocessor electronic board
7_00
24V voltage line faulty on the microprocessor electronic
board
1- check the fuses on the microprocessor electronic board
2- If fuses are regular replace the microprocessor electronic
board
