Fault Finding Chart - Homa Chromatic C 225 Serie Originalbetriebsanleitung

Visual control at pump types with oil chamber (mod-
els without cooling jacket or model „U" with cooling
jacket and open cooling circuit):
Oil level and oil condition:
The condition of the mechanical seals can be visually con-
trolled as follows:
Put the pump in horizontal position, so that the screw of
the oil chamber is on top (for larger pumps: one of both oil
chamber screws).
Remove the screw and take out a small quantity of oil.
The oil becomes greyish white like milk if it contains water.
This may be the result of defective shaft seals.
In this case the condition of the shaft seals should be
checked by a HOMA Service shop.
The oil should be replaced after 3000 operating hours.
Oil type: degradable HOMA-ATOX. Used oil has to be
disposed according to the existing environmental rules
and regulations
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.
Contaminated pumps
If a pump has been used for a liquid which is injurious
to health or toxic, the pump will be classified as contami-
nated.
If HOMA is requested to service the pump, HOMA must
be contacted with details about the pumped liquid, etc.
before the pump is returned for service. Otherwise HOMA
can refuse to accept the pump for service (see attache-
ment).
Possible costs of returning the pump are paid by the cus-
tomer. However, any application for service (no matter to
whom it may be made) must include details about the
pumped liquid if the pump has been used for liquids which
are injurious to health or toxic.
WEEE Notice
The Directive on Waste Electrical and Electronic Equipment
(WEEE), which entered into force as European law on 13th Feb-
ruary 2003, resulted in a major change in the treatment of electri-
cal equipment at end-of-life.
The purpose of this Directive is, as a first priority, the prevention
of WEEE, and in addition, to promote the reuse, recycling and
other forms of recovery of such wastes so as to reduce disposal.
The WEEE logo on the product or on its box indicates that this
product must not be disposed of or dumped with your other
household waste. You are liable to dispose of all your electronic
or electrical waste equipment by relocating over to the specified
collection point for recycling of such hazardous waste. Isolated
collection and proper recovery of your electronic and electrical
waste equipment at the time of disposal will allow us to help con-
serving natural resources. Moreover, proper recycling of the elec-
tronic and electrical waste equipment will ensure safety of human
health and environment. For more information about electronic
and electrical waste equipment disposal, recovery, and collection
points, please contact your local city centre, household waste
disposal service, shop from where you purchased the equipment,
or manufacturer of the equipment.

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 imme-
diately. 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
Pump starts and stops
running in short periods
14
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 • Measure the voltage
consumption due to between two motor
large 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 dis-
closed or blocked charge valve and
possibly open
and/or clean
• Non-return valve • Clean non-return
blocked valve
• Air in pump • Vent the pump
• Float switch has • Proof the position of
changed his position the float switch or
or is defect replace the float
switch