50
Troubleshooting
Fault phenomenon
Cause analysis
Exclusion scheme
remarks
Motor cannot store
energy or abnormal
The voltage specification
is inconsistent with the
circuit breaker
Check whether the data label on the
circuit breaker conforms to the
ordering requirements, or it will be
replaced
The external power supply
must meet the requirements
and the wiring is correct
Wrong wiring of circuit
breaker or external line
Check the circuit with the universal
meter against the wiring diagram
Motor burned out
Replace the motor
After energy storage, the
motor continues to
operate
The travel switch in the mechanism is
broken. Replace the travel switch
The circuit breaker
cannot be closed
Undervoltage coil not
engaged
Supply power to undervoltage coil,
replace if burnt out
Load short circuit or
controller reset button
not reset
Reset the reset button of the
controller after eliminating the short
circuit fault
Shunt coil energized for a
long time
The shunt coil cannot be energized or
checked for a long time. If it is burnt
out, replace it
The circuit breaker
cannot be opened
No action of shunt coil
and undervoltage coil
Supply power to shunt coil, replace if
burnt out
Make the undervoltage coil lose
power, and replace the undervoltage
coil if it does not act
No action of flux
converter
If there is no signal from the ETU,
replace the ETU
Adjust the position of the flux
converter
Frequent tripping
of circuit breaker
Controller red reset
button pops up
Check what protection indicator is on
and eliminate the cause of the fault
If there is no fault in the circuit, the
controller shall be replaced
Undervoltage coil
protection function start
Check if the grid voltage fluctuates
Check whether the power supply of
undervoltage coil is loose
Can the fault be eliminated after the
undervoltage coil is removed
Order replacement parts
In electrical accessories, the following may need to be replaced:
Electric operation mechanism
shunt coil
closing coil
undervoltage coil
auxiliary contacts
Installation of ETU accessories
key lock
Maintenance
