Maintenance And Repair; Fault Finding Chart - Homa TP 50 Series Montagehandleiding
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Zie ook voor TP 50 Series:
- Originele handleiding (25 pagina's) ,
- Originele handleiding (100 pagina's)
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Beschikbare talen
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9. Maintenance and Repair
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Before carrying out maintenance and service, the
pump must be thoroughly flushed with clean water. Rinse
the pump parts in clean water after dismanteling.
In case of a defect of the pump, a repair shall be car-
ried out only by the manufacturer or through an author-
ized workshop. Conversions or alternations of the ma-
chine/unit are permittes only after arrangement with the
manufacturer. Only HOMA spare parts shall be used.
In accordance with the product liability law we point
out that we shall not be liable for damages caused by our
product due to unauthorized repair by persons other than
the manufacturer or an authorized workshop or due to the
use of spare parts other than original HOMA parts. The
same product liability limitations are valid for accessories.
When unscrewing the inspection screw of the oil
chamber, please note that pressure may have built up in
the chamber. Do not remove the screw until the pressure
has been fully relieved.
Before maintenance or repair make sure that all rotat-
ing parts stand still!
Pumps running under normal operation conditions should
be inspected at least once a year. If the pumped liquid is
very muddy or sandy or if the pump is operating continu-
ously, the pump should be inspected every 1.000 operat-
ing hours.
For long and trouble-free operation of the pump, following
points should be checked regularly:
- Nominal current (A): Check with amp-meter.
- Pump parts: Check for possible wear. Replace defective
parts.
- Ball bearings: Check the shaft for noisy or heavy opera-
tion (turn the shaft by hand). Replace defective ball bear-
ings. A general overhaul of the pump is usally required in
case of defective ball bearings or poor motor function.
This work must be carried out by an authorized service
workshop.
- Cable entry: Make sure that the cable entry is watertight
and that the cables are not bent sharply and/or pinched.
- Oil level and oil condition in oil chamber: The oil be-
comes greyish white like milk if it contains water. This
may be the result of defective shaft seal. The oil should
be replaced after 3000 operating hour. Oil type: Shell
Tellus C22, degradable HOMA-Atox available on request.
When the pump is new or after replacement of the shaft
seals, check the oil level after one week of operation.
- Mechanical seals: Check the mechanical seals for wear-
out.
10. Fault Finding Chart
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Fault
Motor does not start.
Fuses blow or motor
starter trips out immedi-
ately. Caution: Do not
start again!
Pump operates, but
motor starter trips out
after a short while
Pump operates at be-
low-standard
performance and power
consumption
Pump operates, but
gives no liquid
14
Cause
Remedy
• Supply failure; short-
• Have the cable and
circuit; earth-leakage;
motor checked and
fault in cable or motor
repaired by a quali-
winding
fied electrician
• Fuses blow due to use
• Install fuses of the
of wrong type of fuse
correct type
• Impeller blocked by
• Clean the impeller
impurities
• Level switch out of
• Check the level
adjustment or defec-
switch
tive
• Low setting of thermal
• Set the relay in ac-
relay in motor starter
cordance with the
specifications on the
pump label
• Increased current con-
• Measure the voltage
sumption due to large
between two motor
voltage drop
phases. Tolerance:
± 10% (± 5% for ex-
plosion-proof
pumps)
• Impeller blocked by
• Clean the impeller
impurities. Increased
current consumption in
all three phases
• Impeller blocked by
• Clean the impeller
impurities
• Wrong direction of
• Check the direction
rotation (only 3 Ph-
of rotation and pos-
pumps)
sibly interchange
two phases (see
section 6.5.)
• Discharge valve
• Check the discharge
closed or blocked
valve and possibly
open and/or clean
• Non-return valve
• Clean non-return
blocked
valve
• Air in pump
• Vent the pump
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