Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
9. Maintenance and Repair
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. Modifications of the pump must be con-
firmed by 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.
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Before maintenance or repair make sure that all rotat-
ing parts stand still!
Before carrying out maintenance and service, the
pump must be thoroughly flushed with clean water. Rinse
the pump parts in clean water after dismanteling.
At pump types with oil chamber an overpressure can
escape with loosening of the oil chamber control screw.
Screw only when pressure balance took place.
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 and impeller: 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.
Additionally at pump types with oil chamber:
- Oil level and oil condition in oil chamber:
Put the pump in horizontal position, so that the screw of
the oil chamber is above (at larger pumps: one of both
screws). Remove the screw and infer a small quantity of
oil. The oil becomes greyish white like milk if it contains
water. This may be the result of defective shaft seal.
In this case leave the condition of the shaft seals by a
HOMA Service to examine.
The oil should be replaced after 3000 operating hours.
Oil type: Shell Tellus C22, degradable HOMA-Atox (avail-
able on request). Used oil is to be disposed accordingly.
Servicing Contract
For a regular expert execution of all necessary mainte-
nance and inspection we recommend the conclusion of a
servicing contract by our HOMA Service. Please contact
our HOMA customer service.
The following table states how much oil the pumps must
have in the oil chamber:
Pump type
GRP 16
GRP 22
GRP 26
GRP 36
GRP 44
GRP 50
GRP 56
GRP 76
GRP 111
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
Quantity of oil in
oil chamber
0,7 l
1,0 l
1,0 l
1,0 l
1,4 l
1,4 l
1,9 l
1,9 l
1,9 l
Cause
Remedy
• Supply failure; short-
• Have the cable and
circuit; earth-leakage;
motor motor
fault in cable or motor
checked and re-
winding
paired by a qualified
electrician
• Fuses blow due to use
• Install fuses of the
of wrong type of fuse
correct type
• Impeller blocked by
• Clean the impeller
impurities
and pump housing
• 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
• Wear of impeller and
• Adjust suction cover
suction cover
again or replace im-
peller and suction
cover
• 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
Werbung
Kapitel
Inhaltsverzeichnis
