4) Failsafe status view and status recovery:
When the failsafe protection trips in the event of starting timeout, overload, open phase or unbalance in the line,
the fault status indicator on the JD-5S protector panel will be lit, and at this time the protector contact opens and is
locked at the OFF state; by pressing the "SET" key, the three-phase current when the trip protection works can be
viewed on the external pointer ammeter. If the digital tube displays "A-", this is the trip current of phase a; if "B-"
is displayed, this is the trip current of phase B; if "C-" is displayed, this is the trip current of phase C. When the
line works normally, press the "RST" key to unlock the current lock state (in case of open phase, unbalance, or
starting timeout, press the "RST" key for unlocking). As the overload protection has the thermal memory function,
pressing the "RST" key cannot realize the unlocking action, and the unlocking will be carried out automatically
when the electric motor is cooled down (also, the protector can be powered on again for unlocking).
VI. Operation Precautions
1. Connect the wire properly according to the wiring diagram.
2. Set the setting current according to the rated current marked on the nameplate of electric motor by combining
with the display on the digital tube via keys.
3. During the startup of electric motor, the overload indicator will be lit. After startup, the overload indicator shall
be off during normal operation, so that the adjustment process is completed.
4. Please check the performance of the protector regularly, such as open phase test and overload test.
5. It is strictly prohibited to increase the current of the protector when the current and electric motor or the load
works abnormally, otherwise this may cause the electric motor burns.
6. The equipment that may cause major economic losses or personal safety shall be designed to ensure that the
technical characteristics and performance values have sufficient margins, and safety measures such as double
circuit protection should be taken.
VII. Common Faults and Solutions
1. If the motor stops during normal operation, carefully check the electric motor for open phase or overload. First
check whether the electric motor has very high temperature rise; if found temperature rise, the overload may
occur; if not found temperature rise, the line may have open phase to cause trip; check whether the three-phase
power supply works normally; check the moving and fixed contacts of the AC contactor have good contact; check
whether three power lines of electric motor are loose; If all are normal but the electric motor still fails to start,
please carefully check whether the connecting screws of the self-lock contact of AC contactor and the
normally-closed contact of protector are loose; the electric motor can start only after all faults are eliminated. Do
not start the product forcedly when the fault is not eliminated to prevent accidents.
