DAB KV 10/4 M Инструкция по эксплуатации онлайн [33/108] 146710

DAB KV 10/4 M Инструкция по эксплуатации онлайн [33/108] 146710
ENGLISH
27
14. TROUBLESHOOTING
FAULT
CHECK
(possible cause)
REMEDY
1. The motor does not
start and makes no
noise
A. Check the protection fuses.
B. Check the electric connections.
C. Check that the motor is live.
D. The motor protector may have tripped
due to exceeding the maximum
temperature limit (single-phase
version).
A. If they are burnt-out, change them.
If the fault is repeated immediately
this means that the motor is short
circuiting.
D. Wait for automatic reset of the motor
protector once the temperature has
fallen below the maximum limit
.
2. The motor does not
start but makes
noise.
A. Ensure that the mains voltage
corresponds to the voltage on the data
plate.
B. Check that the connections have been
made correctly.
C. Check that all the phases are present
on the terminal board.
D. The shaft is blocked. Look for
possible obstructions in the pump or
motor.
B. Correct any errors.
C. If not, restore the missing phase.
D. Remove any obstructions.
3. The motor turns
with difficulty.
A. Check the supply voltage which may
be insufficient.
B. Check whether any moving parts are
scraping against fixed parts.
C. Check the state of the bearings.
B. Eliminate the cause of the scraping.
C. Change any worn bearings.
4. The (external)
motor protection
trips immediately
after starting.
A. Check that all the phases are present
on the terminal board.
B. Look for possible open or dirty
contacts in the protection.
C. Look for possible faulty insulation of
the motor, checking the phase
resistance and insulation to earth.
A. If not, restore the missing phase.
B. Change or clean the component
concerned.
C. Change the motor casing with the
stator or reset any cables discharging
to earth.
5. The motor
protection trips too
frequently.
A. Ensure that the environment
temperature is not too high.
B. Check the calibration of the
protection.
C. Check the motor rotation speed.
D. Check the state of the bearings.
A. Provide suitable ventilation in the
environment where the pump is
installed.
B. Calibrate at a current value suitable
for the motor absorption at full load.
C. Consult the motor data plate.
D. Change any worn bearings.
6. The pump does not
deliver.
A. The pump has not been correctly
primed (presence of air in the intake
pipe or inside the pump).
B. On three-phase motors, check that the
direction of rotation is correct.
C. Difference in suction level too high.
D. The diameter of the intake pipe is
insufficient or the horizontal stretch is
too long.
E. Foot valve or intake pipe blocked.
A. Fill the pump and the intake pipe with
water. Prime the pump.
B. Invert the connection of two supply
wires.
C. See point 7 of the instructions for
installation.
D. Replace the intake pipe with one with
a larger diameter.
E. Clean the foot valve and the intake
pipe.

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