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70
Problem
Possible causes
Checkup & resolution
Notes
It’s not possible to
close the breaker
The spring of closing
pushbutton (I) is out
of seat
Get the spring on
correct position
The spring of “springs
charging indicator” is
out of seat
Get the spring in
correct position
Mechanism jammed
Follow the mechanism
maintenance
procedures MCH. If
the problem persists,
contact BTicino
It’s not possible to
open the breaker
Shunt trip doesn’t
work
Check its power
supply circuit. Check
the fitting on breaker
seat. If the problem
persists, replace the
shunt trip
UVR doesn’t work
Check its power
supply circuit. Check
the fitting on breaker
seat. If the problem
persists, replace the
UVR
Mechanism jammed
Follow the mechanism
maintenance
procedures MCH. If
the problem persists,
contact BTicino
It’s not possible to
electrically charge
the springs
Motor operator
doesn’t work
Check its power
supply circuit
The supply voltage
on motor operator
terminals is correct
but the motor doesn’t
work
Check the integrity of
motor operator and
its protection fuse. If
necessary, replace the
fuse. If the problem
persists, replace the
motor
It’s not possible to
charge manually
the springs
Check the springs are
not charged yet
Try to close
the breaker
and check the
correct indication
on springs charged
Содержание Megabreak T803LE1250
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