28/06/2013 7CH4Q107_E_4
10
ALARMS
Onboard programmer can display the failures or alarms: in the following table there is the
list, the meaning of this alarms, and how to solve the problem.
HANDHELD
PROGRAMMER
ALARM
WHAT TO DO
ALARM A1
FORW. SW CLOSED
Forward switch
closed at power-on
Put the speed reference
to zero and open the FW
switch.
ALARM A2
BACK SW CLOSED
Backward switch
closed at power-on
Put the speed reference
to zero and open the BW
switch.
ALARM A3
POT FAULT
Potentiometer
fault
Check the
potentiometer’s wires.
ALARM A4
POTI OUT OF ZERO
Potentiometer
out of neutral
position at
power-on
Move the potentiometer
to neutral position or, if it
is in neutral position yet,
calibrate the speed
reference.
Thermal
protection
Wait few minutes and
check the motor current.
ALARM A5
OVERTEMPERATURE
ALARM A6
POWER STAGE
Controller’s
power stage
damaged
Change the controller.
Overcurrent 1:
short circuit
Check the motor’s wires:
if ok, and the controller
repeats this alarm,
change it.
ALARM A7
OVERCURRENT 1
