Homa Barracuda GRP 20 DA [14/36] Fault finding chart
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Homa Barracuda GRP 20 DA [14/36] Fault finding chart

Homa Barracuda GRP 36 DA [14/36] Fault finding chart
14
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 Quantity of oil in
oil chamber
GRP 16 0,7 l
GRP 22 1,0 l
GRP 26 1,0 l
GRP 36 1,0 l
GRP 44 1,4 l
GRP 50 1,4 l
GRP 56 1,9 l
GRP 76 1,9 l
GRP 111 1,9 l
10. Fault Finding Chart
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Fault Cause Remedy
Motor does not start.
Fuses blow or motor
starter trips out immedi-
ately. Caution: Do not
start again!
• Supply failure; short-
circuit; earth-leakage;
fault in cable or motor
winding
• Have the cable and
motor motor
checked and re-
paired by a qualified
electrician
• Fuses blow due to use
of wrong type of fuse
• Install fuses of the
correct type
• Impeller blocked by
impurities
• Clean the impeller
and pump housing
• Level switch out of
adjustment or defec-
tive
• Check the level
switch
Pump operates, but
motor starter trips out
after a short while
• Low setting of thermal
relay in motor starter
• Set the relay in ac-
cordance with the
specifications on the
pump label
• Increased current con-
sumption due to large
voltage drop
• Measure the voltage
between two motor
phases. Tolerance:
± 10% (± 5% for ex-
plosion-proof
pumps)
• Impeller blocked by
impurities. Increased
current consumption in
all three phases
• Clean the impeller
Pump operates at be-
low-standard
• Impeller blocked by
impurities
• Clean the impeller
performance and power
consumption
• Wear of impeller and
suction cover
• Adjust suction cover
again or replace im-
peller and suction
cover
• Wrong direction of
rotation (only 3 Ph-
pumps)
• Check the direction
of rotation and pos-
sibly interchange
two phases (see
section 6.5.)
Pump operates, but
gives no liquid
• Discharge valve
closed or blocked
• Check the discharge
valve and possibly
open and/or clean
• Non-return valve
blocked
• Clean non-return
valve
• Air in pump • Vent the pump

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