Fault Finding Chart - Homa H 501 W(A) Originalbetriebsanleitung

10. Fault Finding Chart

Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Fault Cause
• Supply failure;
Motor does not start.
Fuses blow or motor
short-circuit; earth-
starter trips out im-
leakage; fault in
mediately. Caution:
cable or motor
Do not start again!
winding
• Fuses blow due to
use of wrong type
of fuse
• Impeller blocked by
impurities
• Level switch out of
adjustment or de-
fective
• Low setting of
Pump operates, but
motor starter trips
thermal relay in mo-
out after a short
tor starter
while
• Increased current
consumption due to
large voltage drop
• Impeller blocked by
impurities. In-
creased current
consumption in all
three phases
• Impeller blocked by
Pump operates at
below-standard per-
impurities
for-
• Wrong direction of
mance and power
consumption
rotation (only 3 Ph-
pumps)
• Discharge valve
Pump operates, but
gives no liquid
closed or blocked
• Non-return valve
blocked
• Air in pump
• Level switch out of
Pump cycling be-
tween start and stop
adjustment or de-
fective
Remedy
• Have the cable
and motor motor
checked and re-
paired by a quali-
fied electrician
• Install fuses of
the correct type
• Clean the
impeller
• Check the level
switch
• Set the relay in
accordance with
the specifications
on the pump label
• Measure the volt-
age between two
motor phases.
Tolerance: ± 10%
(± 5% for explo-
sion-proof
pumps)
• Clean the
impeller
• Clean the
impeller WEEE Notice
• Check the direc-
The Directive on Waste Electrical and Electronic Equip-
tion of rotation
ment (WEEE), which entered into force as European law
and possibly in-
on 13th February 2003, resulted in a major change in the
terchange two
treatment of electrical equipment at end-of-life.
phases (see sec-
tion 6.4)
The purpose of this Directive is, as a first priority, the pre-
• Check the dis-
vention of WEEE, and in addition, to promote the reuse,
charge valve and
recycling and other forms of recovery of such wastes so
possibly open
and/or clean
as to reduce disposal.
• Clean non-return
valve
The WEEE logo on the product or on its box indicates that
• Vent the pump
this product must not be disposed of or dumped with your
• Check the level
other household waste. You are liable to dispose of all
switch
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 conserving natural
resources. Moreover, proper recycling of the electronic
and electrical waste equipment will ensure safety of hu-
man health and environment. For more information about
electronic and electrical waste equipment disposal, recov-
ery, 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.
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