Storing The Product; Fault Finding; The Motor Does Not Start, The Fuses Blow; Immediately - Grundfos DPK Series Installation And Operating Instructions Manual

8. Storing the product

Newly delivered products can be stored for 1 year
without opening the original package.
For extended periods of storage, the pump
must be protected from moisture, heat,
vibration and corrosion.
After an extended period of storage, inspect the pump
before operation. Make sure that the impeller can
rotate freely. Check the condition of the shaft seals,
O-rings and the cable entries.
Store the pump in a vertical position on a
pallet or a stand while in the factory
packaging. Make sure that it cannot roll or
fall over. Pumps without factory packaging
can be stored both horizontally and
vertically.
Leave the cable-end protectors on the
power- and control cables until starting the
electrical connection. Whether insulated or
not, the free cable end must never be
exposed to moisture or water to prevent
motor damage.
Give all unpainted surfaces a thin coat of
oil or grease to prevent corrosion.
If the pump is being stored for more than a
month, turn the impeller at least every
month to prevent the seal faces of the
mechanical shaft seal from seizing
up which can damage the shaft seal at the
pump start.
If the impeller cannot be turned, contact
Grundfos or an authorised service
workshop.
WARNING
Crushing hazard
Death or serious personal injury
‐
Do not turn the impeller by hand.
Always use an appropriate tool.
If an installed pump is not in operation for
a longer period, check the insulation
resistance and run the pump for 30
minutes every month.
When the pump is not in service,
disconnect the power supply from the
control panel.

9. Fault finding

Before diagnosing any fault, read and observe the
safety instructions.
For pumps with a sensor, start fault finding
by checking the status on the GU01 or
GU02 front panel. See the installation and
operating instructions for GU01 or GU02.
DANGER
Electric shock
Death or serious personal injury
‐
Before working on the product, make
sure that the power supply is switched
off and it cannot be switched on
unintentionally.
Related information
6.3 Checking the direction of rotation
9.1 The motor does not start, the fuses
blow or the motor protector trips out

immediately

Do not start the pump.
Cause
Power supply failure,
short circuit or earth
leakage in the cable or
the motor winding.
The fuses blow due to
use of incorrect fuses.
The impeller is blocked
by impurities.
The level pickup, float
switch or electrode is
out of adjustment or
defective.
Motor phase
malfunction.
Remedy
• Have the cable and
motor checked and
repaired by a qualified
electrician.
• Fit fuses of the correct
type.
• Clean the impeller.
• Check the level
pickups, float switches
or electrodes.
• Inspect the motor and
the connections.
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