Fault Finding Chart; Warranty Conditions And Warranty - Homa TP 28 Montage- Und Betriebs-Anleitung

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.

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
13
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
• 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 6.4)
• Discharge valve clo- • Check the discharge
sed or blocked valve and possibly
open and/or clean
• Non-return valve • Clean non-return
blocked valve
• Air in pump • Vent the pump