DAB K 36/200 Installationsanweisung Und Wartung Seite 31

11.2 DANGER OF FROST: When the pump remains inactive for a long time at temperatures of less
than 0°C, the pump body must be completely emptied through the drain cap Fig. H, to prevent
possible cracking of the hydraulic components. This operation is advisable even in the event of
prolonged inactivity at normal temperature.
Do not close the drainage cap until the pump is to be used again.
When restarting after long periods of inactivity it is necessary to repeat the operations described
above in the paragraphs "WARNINGS" and "STARTING UP".
12. MAINTENANCE AND CLEANING
12.1
Periodic checks
In normal operation, the pump does not require any kind of maintenance. However, from time to
time it is advisable to check current absorption, the manometric head with the aperture closed and
the maximum flow rate, which will enable you to have advance warning of any faults or wear.
13. MODIFICATIONS AND SPARE PARTS
14. TROUBLESHOOTING
FAULT
The motor does not
1.
start and makes no
noise.
The motor does not
2.
start but makes
noise.
The motor turns
3.
with difficulty.
The (external) motor
4.
protection trips
immediately after
starting.
Check that the leakage of liquid does not damage persons or
things, especially in plants that use hot water.
The electropump can only be dismantled by competent skilled personnel, in
possession of the qualifications required by the legislation in force. In any case,
all repair and maintenance jobs must be carried out only after having disconnected
the pump from the power mains. Ensure that it cannot be switched on accidentally.
If possible, keep to a maintenance schedule: expensive repairs or machine down
times can be avoided with a minimum expense. During maintenance schedule
discharge the condensate, if necessary present into the motor, through the hole,
removing the exhaust port plug (electropumps with IP55 Degree of motor protection
only)
If the liquid has to be drained out maintenance, ensure that the liquid coming
out cannot harm persons or things, especially in using hot water.
The legal requirements on the disposal of any harmful fluids must also be
complied with.
Any modification not authorized beforehand relieves the manufacturer of all
responsibility. All the spare parts used in repairs must be original ones and the
accessories must be approved by the manufacturer so as to be able to guarantee
maximum safety of the machines and systems in which they may be fitted.
CHECK (possible cause)
A. Check the protection fuses.
B. Check the electric connections.
C. Check that the motor is live.
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.
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.
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.
ENGLISH
A. If they are burnt-out, change them.
If the fault is repeated immediately this
means that the motor is short circuiting.
B. Correct any errors.
C. If not, restore the missing phase.
D. Remove any obstructions.
B. Eliminate the cause of the scraping.
C. Change any worn bearings.
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.
25
REMEDY