Elmo Rietschle G-BH10 User Manual

Page 22

Servicing

610.44431.40.000

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7.2 Repair/

Troubleshooting

Fault

Cause

Remedy

Carried out by

At least two power supply
leads interrupted.

Check fuses, terminals and supply leads and
close circuit where interrupted.

Electrician

No signal at control signal
inputs A and B.

Apply control signals, see section 5.2.1,
"Electrical Connection (Motor)", page 11.

Electrician

Motor does
not start, no
motor noise.

No speed reference value
given.

Set speed reference value, see section 5.2.1,
"Electrical Connection (Motor)", page 11.

Electrician

Impeller jammed.

Open pump lid, remove dirt and foreign bodies,
as described in section 7.1.1, "Cleaning", pa-
ge 20.

Qualified per-
sonnel

Impeller damaged.

Replace impeller.

Service

Motor bearing damaged. Replace "complete casing" (i.e. the unit consist-

ing of casing, stator and two ball bearings).

Service

Motor does
not start,
humming
noise.

Wrong connection of mo-
tor connecting leads.

Check and, if necessary, correct the connection
of the motor phases and hall signals to the drive
electronics, see section 5.2.1, "Electrical Con-
nection (Motor)", page 11.

Electrician

Winding short-circuit.

Have winding checked.

Electrician

Motor overload.

Reduce operating pressure. If necessary, clean
filter, silencers, and pipes.

Qualified per-
sonnel

Power con-
sumption too
high.

Impeller jammed.

See "Motor does not start, humming noise".

Qualified per-
sonnel

Leak in the system.

Seal leak in the system.

Qualified per-
sonnel

Wrong direction of rota-
tion.

Reverse direction of rotation by applying the
correct signals to the control signal inputs A and
B see section 5.2.1, "Electrical Connection (Mo-
tor)", page 11.

Electrician

Speed reference value
representing the desired
speed (n

des

) too low.

Adjust speed reference value (n

des

) within a

range of 0...10 V.

Qualified per-
sonnel

Temperature of the elec-
tronics too high.

Provide sufficient heat dissipation and cooling. Qualified per-

sonnel

Blower too small.

Use bigger blower.

Operator /
qualified per-
sonnel

Density of the pumped
gas unequal 1.23 g/m³
(= density of air at 15°C
[59°F] and 1013 mbar).

Use bigger blower.

Operator /
qualified per-
sonnel

No vacuum /
pressure or
too little vac-
uum / pres-
sure gener-
ated.

Impeller dirty.

Clean impeller;
if worn, have impeller replaced.

Qualified per-
sonnel / Service

Flow rate too high.

Increase pipe cross section, clean pipe.

Qualified per-
sonnel

Abnormal
screeching
noise.

Ball bearing damaged.

Replace "complete casing" (i.e. the unit consist-
ing of casing, stator and two ball bearings).

Service

Impeller leak. Relative pressure be-

tween blower and sur-
roundings too high.

The permissible differential pressure between
the pump interior and the surroundings has
been exceeded. Make sure that the differential
pressure is not exceeded.

Qualified per-
sonnel

Current feed
to the mains.

Caused by switching off
or rapidly reducing the
speed of the blower.

Insert a diode (Schottky diode, size 6A respec-
tively10A) in the 24V respectively 48V supply
lead (+V

Electrician