Robot Pumps RW-R-SERIES Manual

782-007-GB HSC 02-W51 Edition 1
OPERATION
&
MAINTENANCE MANUAL
RW-R-SERIES
STAINLESS STEEL
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Operation &
Maintenance Manual
Pump
RW-R
782-007-GB HSC 02-W51 Edition 13/28
Contents ............................................................................................................................... page
1. FOREWORD.................................................................................................................4
2. GUARANTEE ...............................................................................................................4
3. SAFETY AND ENVIRONMENT ....................................................................................5
3.1 Symbols............................................................................................................................................5
3.2 General safety instructions ................................................................................................................5
3.3 Environment......................................................................................................................................5
4. TECHNICAL DATA .......................................................................................................6
4.1 General .............................................................................................................................................6
4.2 Main parts .........................................................................................................................................6
5. FIRST PUMP START....................................................................................................7
5.1 Delivery check ..................................................................................................................................7
5.2 Oillevel .............................................................................................................................................7
5.3 Power supply.....................................................................................................................................7
5.4 Thermoswitches ................................................................................................................................7
5.5 Cable entry........................................................................................................................................7
5.6 Motor protection ................................................................................................................................7
5.7 Motor check ......................................................................................................................................8
5.8 Installation parts ................................................................................................................................8
5.9 Direction of rotation ...........................................................................................................................8
5.10 Current-check....................................................................................................................................8
5.11 Medium temperature / max. motorload ..............................................................................................9
5.12 Startfrequency ...................................................................................................................................9
5.13 Min. and max. submersible depth ......................................................................................................9
6. INSTALLATION OPTIONS ...........................................................................................10
6.1 Installation -H ....................................................................................................................................10
6.2 Installation -V ....................................................................................................................................11
6.3 Checkpoint installation -V ..................................................................................................................12
6.4 Installation -F ....................................................................................................................................13
6.5 Installation -T ....................................................................................................................................13
7. MAINTENANCE............................................................................................................14
7.1 General .............................................................................................................................................14
7.2 Maintenance scedule.........................................................................................................................14
7.3 Lubricants .........................................................................................................................................14
7.4 Cable entry........................................................................................................................................15
7.5 Oil level ............................................................................................................................................16
7.6 Oil change.........................................................................................................................................17
7.7 Motor housing ...................................................................................................................................18
8. TRANSPORT AND STORAGE.....................................................................................19
9. OPTIONS......................................................................................................................19
9.1 Waterdetector ...................................................................................................................................19
9.2 Thermoswitches ................................................................................................................................20
9.3 Thermistors .......................................................................................................................................20
9.4 Cable protection ................................................................................................................................20
9.5 Special oil .........................................................................................................................................20
10. TROUBLE SHOOTING.................................................................................................21
APPENDIX 1; Dataplate .......................................................................................................22
APPENDIX 2; Direct-on-line start motor ............................................................................23
APPENDIX 3; Star-delta start motor ...................................................................................25
APPENDIX 4; Single phase start ........................................................................................27
APPENDIX 5; Notes .............................................................................................................28
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Operation &
Maintenance Manual Pump RW-R
4/28 Edition 1HSC 02-W51 782-007-GB
1. FOREWORD
You are to be congratulated on choosing a ROBOT
pump, which will undoubtedly serve you both reliably
and economically for a long time, providing you observe
the Maintenance Instructions given in this manual.
The RW-pump is a Non-Clogging Vortex pump designed
to pump sewage and other solids containing waste
water.
Proper use and maintenance will prolong the operational
life of your ROBOT pump.
This manual contains different warnings and safety
prescription.
Read this manual properly, so that dangerous situations,
physical injury or damage can be avoided.
The RW-pump is designed for profesional
use only. Service and maintenance may
only be done by authorised personal, after
reading this manual.
This RW-pump may not be used in a
potentially explosive atmosphere.Use a
ROBOT flameproof pump instead.
When ordering spareparts, always quote.
1. Pumptype
2. Code
3. Serialnumber
This information is found on the dataplate.
(See appendix 1)
Sectional drawings and partslists are available on
request.
All products manufactured by Robot Pumps B.V. are
made with great care and according to our high internal
standards. Should you however have any suggestions
concerning our pump range or this instruction manual
which will contribute to the quality of our product please
do not hesitate to contact us.
Robot Pumps B.V.
Produktieweg 5
P.O. Box 140
2400 AC Alphen aan den Rijn
The Netherlands
2. GUARANTEE
We refer to the warrenty agreement with your
local dealer.
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3. SAFETY AND ENVIRONMENT
3.1 Symbols
*In this manual
General warning
Danger !
Electrical hazard !
Attention !
*On the pump
Danger of physical injury
Rotating parts !
Electrical hazard !
EC-conformity symbol
3.2 General safety instructions
*Only trained and authorized personalmay install and
maintain the pump after carefully reading this
manual.
*Only use the pump for its intended purpose and
under the regulated circumstances.
*Don’t go near rotating parts.
*Clean the pump before maintenance and inspection.
*Observe the local regulations when working with
agressive, corrosive, toxic, flameable and explosive
chemicals.
*Never remove safety signs, keep them clean.
*Always connect to a grounded circuit.
*Before maintenance and inspection always
disconnect the pump from the mains.
*Use a proper hoist for lifting and handling the pump.
*Do not leave a large loop of cable in the sump,
as the pump may eventually damage it.
*Never drop the loose cable end in water. The water
may enter the cable and finally enter the
motorhousing, eventually causing motor failure.
3.3 Environment
Parts which are replaced during repair, maintenance or
renewal, could contain materials which could be harmful
to the environment.
Please take care in the disposal of these parts.
Do this in accordance with the local environmental
regulations.
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Operation &
Maintenance Manual Pump RW-R
6/28 Edition 1HSC 02-W51 782-007-GB
4. TECHNICAL DATA
4.1 General
The RW-R pump is a stainless steel (AISI316) non-
clogging vortex impeller pump, designed to pump a
wide variety of solids contaminated liquids.
The impeller leaves a wide unobstructed passage
through the volute, in which a strong vortex is created
that carries most of the solids.
The pump can be used in aggressive applications
pH = 1-13. Standard elastomers are in FPM (Viton).
For the cable a stainless steel protective tube is avail-
able.
4.2 Main parts
Construction:
-High efficiency motor, standard class F
insulation (up to 155 oC / 300oF).
-Two independent mechanical seals, running in oil,
form an effective barrier between pump and motor.
-Heavy duty bearings, greased for live.
-Clog-free vortex impeller.
-Vanes at the backside prevent solids entering the
seal area and reduce the pressure on the seal.
Fig. 4.1
4
14
3
13
16
8
5
7
6
1
2
9
10
9
15
12
11
14
13
12
11
15
10
9
8
7
6
5
9
16
3
41 2
RW20-R RW40-R
1Pumpcasing
2Impeller
3Suction
4Delivery
5Motorcasing
10 Mechanical seal
(2x)
11 Oil reservoir
12 Oil plug
Fig. 4.2
6Rotor
7Stator
8Shaft
9Bearings
13 Cable entry
14 Cable
15 Inspection plug
16 Waterdetector (optional)
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5. FIRST PUMP START
After unpacking the pump, carry out the following check
points:
5.1 Delivery-check
Check for possible transport damage and especially
check that the cable has not been nicked or
damaged.
Check for complete delivery.
When the delivery is incomplete or damaged, please,
contact your dealer immediately.
5.2 Oil level
Check the oil level. (see 7.5)
5.3 Power supply
Before making the electrical connections, check if
the line voltage and frequency are the same as on the
pump dataplate.
If thermostats are supplied make sure that they are
correctly connected.
For examples of electrical diagrams and pump
cable coding, see appendix 2, 3 and 4.
5.4 Thermoswitches
Check if the pump is equipped with thermo-switches
Contact rating: max. 250V-1.6A
The contacts are normally closed.
5.5 Cable entry
Especially when the pump has been in store for a
long time, the cable gland should be checked and
if necessary tightened (see 7.4).
5.6 Motor protection
The pump should always be connected to the line by
means of a suitable motor protection circuitbreaker.
If the pump is started direct on line (DOL), the protection
breaker should be set to the current, as given on the
dataplate.
For star delta start (YD), it is good practice to install the
overcurrent relay directly after the main contactor. In this
case, the pump is also adequately protected in star-
connection. The maximum setting of the overcurrent
relay is 0.6x the current as given on the dataplate.
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Operation &
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8/28 Edition 1HSC 02-W51 782-007-GB
5.7 Motor check
If in doubt about the condition of the motor or cable,
Megger test motorwindings against grounding wire.
The phase resistance against grounding wire should be
at least 1 MOhm.
Turn the impeller clockwise by hand, using a proper
socket wrench (see fig.5.1)
This should be possible without much force.
With this procedure sticking mechanical seal
surfaces will be loosened smoothly.
5.8 Installation parts
Check if all components for your installation
are delivered. See also chapter 6.
5.9 Direction of rotation
A correct direction of rotation is essential for proper
operation. This can be checked as follows:
-Put the pump in horizontal position and start the
pump.
Looking on the impeller through the suction
opening, the correct direction of rotation is
counter-clockwise
(See arrow on pumpcasing, Fig. 5.2).
or:
-Starting the pump will give a recoil on the
pump frame.
Looking at the motor (in vertical position see
Fig. 5.3), the recoil is counter-clockwise.
Take care !
The recoil can be very powerful !
Don’t go too near rotating parts !
5.10 Current-check
Note the max. current from the dataplate.
Apply an ammeter to one of the phase wires
during normal operation. Check that the current
is not higher than the value on the dataplate.
(see appendix 1). If so check for:
-voltage (too low ?)
-specific gravity or viscosity of the fluid
(too high ?)
-blocked impeller ?
-direction of rotation correct ?
If the problem cannot be solved contact your dealer.
Fig. 5.1
Fig. 5.2
Fig. 5.3
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5.11 Medium temp. / max.motorload
When the medium temperature is higher than 40oC, the
maximum motorload must be reduced.
The relationship between medium temperature and
maximum absorbed motor current is shown below.
Check the reading of the data plate against the reading
of an Ammeter.
If the motor current exeeds the max. motorcurrent from
the table below the pump is not suitable or the
motorcurrent must be reduced.
The motorcurrent can be reduced by installing a
smaller impeller. Contact your dealer.
Temperature Max.motorcurrent
oCoF%
40 104 100
50 122 95
60 144 90
70 158 80
80 176 70
5.12 Startfrequency
When the pump is controlled by level regulators, the on-
and off levels should be adjusted in such a way, that the
pump does not do more than 20 starts an hour.
5.12 Min. and max. submersion depth
The motorhousing should be at least 2/3 submerged for
continuous operation at full load (see Hmin.1 Fig. 5.4). It
is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling is
required. We recommend not to run the pump with the
water level below the top of the volute in order to avoid
air being drawn in (see Hmin.2 Fig. 5.4).
Air in the discharge pipes might impair performance.
The maximum submersion depth is 20m / 60ft.
Fig. 5.4
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Operation &
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10/28 Edition 1HSC 02-W51 782-007-GB
6. INSTALLATION OPTIONS
For the submersible pump the following installations are
possible:
-H Stationary wet installation with a header
coupling type HK.
-V Stationary wet installation with a guide bar
quick release coupling type V.
-F Freestanding wet installation.
-T Transportable wet installation.
6.1 INSTALLATION - H
Stationary wet installation with a ROBOT quick-release
header coupling type HK.
A flexible hose connects pump and coupling.
Most of the RW20 pumps (except types with larger
pumpcasings) will have a vertical position, see Fig. 6.1.
RW40 pumps are horizontally placed, see Fig. 6.2.
Except for the pump the following components are
necessary:
1. Hose connection, which is fastened to the
pump;
2. Flexible hose, between pump and coupling;
3. Header coupling, consisting of coupling
bend, rubber joint and a fixed coupling part;
4. Suspension bracket and chain, for lifting the
pump;
5. Level regulators for start-, stop- and alarm-
signals;
6. Suspension for level regulators and power
supply cable;
7. Piping, non return valve, bends etc.
Checkpoints before operating:
-Ensure a good free passage beneath
the suction elbow of the pump
(at least the same as the suction diameter).
-Adjust the start- and stoplevels in such a
way that the motor does not make more
than 20 starts per hour way that the motor
does not make more than 20 starts per hour.
-Check that the motor is adequately cooled.
The motorhousing should be at least 2/3 submerged
for continuous operation at full load (see Hmin.1
Fig. 6.1).
It is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling is
required. We recommend not to run the pump with the
water level below the top of the volute in order to avoid
air being drawn in (see Hmin.2 Fig. 6.1).
Air in the discharge pipes might impair performance.
Fig. 6.1
Fig. 6.2
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6.2 INSTALLATION -V
Stationary wet installation with a ROBOT quick-release
guide bar coupling type -V. The pump is automatically
coupled to the discharge.
Except for the pump the following components are
necessary:
1. Bottom elbow, rubber joint and coupling
adapter;
2. Guide bar foundation plate
(n.a. for V-50);
3. Two guide bars
(V-50 coupling needs only one guide bar);
4. Top bracket, mounted within the wellcover
clearance;
5. Level regulators for start-, stop- and alarm-
signals;
6. Suspension for level regulators and power
supply cables;
7. Piping, non return valve, discharge bends etc.
Checkpoints before operating:
-The guide bars must stand vertical
(maximum tolerance 3o).
-The installation angle must be about 10-15o
(see Fig. 6.4). If necessary, this angle can be
changed by alteration of the position of the
lifting hook on the suspension bracket on top
of the motor (pos. 1)
-Adjust the start- and stoplevels in such a
way that the motor does not make more
then 20 starts per hour.
-Check that the motor is adequately cooled.
The motorhousing should be at least 2/3 submerged
for continuous operation at full load (see Hmin.1
Fig. 6.3).
It is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling is
required. We recommend not to run the pump with the
water level below the top of the volute in order to avoid
air being drawn in (see Hmin.2 Fig. 6.3).
Air in the discharge pipes might impair performance.
Fig. 6.3
Fig. 6.4
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Operation &
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12/28 Edition 1HSC 02-W51 782-007-GB
6.3 Checkpoint installation - V
In some applications it is possible that the pump will not
work due to presence of air in the volute.
Lifting the pump a bit (25mm / 1inch) while running may
solve the problem.
When the problem repeats, an air-venthole can be
drilled in the coupling adaptor and a special gasket must
be fitted. (see fig. 6.5).
When air is present, this will escape through the hole.
When the fluid arrives, the special gasket will close the
hole.
-Take part (1) (fig.6.6).
-Drill a 8mm hole in the cast boss on top
of the coupling adapter.
-Deburr the hole.
-Place a special gasket (3) (Fig. 6.7)
-Mount the coupling adapter (1) to the
pump (2).
Partnumbers for special gaskets.
Coupling type: partnumber:
Neoprene Viton
V 65/ V 80 761-056 761-071
V 100 761-057 761-072
Fig. 6.5
Fig. 6.6
Fig. 6.7
Air
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6.4 INSTALLATION - F
Freestanding: semi-permanent fixed wet installation.
Except for the pump the following components are
necessary:
1. Hose or threaded connection, which is
fastened to the pump;
2. Flexible hose or pipe;
3. Pump support;
4. Level regulators.
Checkpoints before operating:
-Adjust the start- and stoplevels in such a
way that the motor does not make more
than 20 starts per hour.
-Check that the motor is adequately cooled.
The motorhousing should be at least 2/3 submerged
for continuous operation at full load (see Hmin.1
Fig. 6.8).
It is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling
is required. We recommend not to run the pump with
the water level below the top of the volute in order to
avoid air being drawn in (see Hmin.2 Fig. 6.8).
Air in the discharge pipes might impair performance.
6.5 INSTALLATION - T
Transportable wet installation.
Except for the pump the following components are
necessary:
1. Hose connection, which is fastened to the pump;
2. Flexible hose;
3. Pump support.
Checkpoints before operating:
-Do not let the pump bury itself in the mud.
-Do not leave a large loop of the cable in
the sump, as the pump may eventually
damage it.
-Check that the motor is adequately cooled.
The motorhousing should be at least 2/3 submerged
for continuous operation at full load (see Hmin.1
Fig. 6.9).
It is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling
is required. We recommend not to run the pump with
the water level below the top of the volute in order to
avoid air being drawn in (see Hmin.2 Fig. 6.9).
Air in the discharge pipes might impair performance.
Fig. 6.8
Fig. 6.9
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Operation &
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14/28 Edition 1HSC 02-W51 782-007-GB
7. MAINTENANCE
7.1 General
Always disconnect the pump from the
mains before inspection or disassembly.
Clean the pump thoroughly.
The motor housing can be hot when the
pump is just switched off.
7.2 Maintenance schedule
*After the first 20 running hours:
-Check the oil level (see chapter 7.5).
If there is more than a few drops of water in it,
contact your dealer.
*Every 6 months or 500 running hours:
-Check the oil and oil level (see chapter 7.5).
If there is more than a few cm3 (about 0.5 inch3 )
water in it, contact your dealer.
-Refresh the oil every year or when it is no
longer transparant. (see chapter 7.6)
7.3 Lubricants
*The bearings are greased for life and need
no refill.
*The oil reservoir is filled with SHELL
VITREA ISO-VG 46.
Viscosity: 46 cSt.
When another kind of oil is used this is
marked on a label on the pump.
Oil quantaties:
RW20-R: 0.6 liter / 0.15 US gallon.
RW40-R: 2.2 liter / 0.58 US gallon.
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7.4 Cable entry
Especially when the pump has been in use for a long
time, the compression of the rubber cable
seal might be deminished, which can cause leakage. By
screwing-in the cable entry the seal will be retensioned.
Unscrew the 2 hexagon socket screws (1). See fig. 7.1.
Remove the cable clamp (2).
Turn the hexagon head of the entry (1) clockwise, using
the right tool, so far that it is possible to replace the
cable clamp again.
Screw-in the 2 hexagon socket screws (1).
It is possible that your pump is fitted
with 1 or 2 cables.
Fig. 7.1
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Operation &
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7.5 Oil level
7.5.1 RW 20
Put the pump in a horizontal position so that the 2
hexagonal socket screws are on top (see fig.7.2).
Unscrew the level plug (1) and the vent plug (2).
The oil level should be at the lower side of the openings
(see drawing).
By turning the pump a bit this should be visible.
If not so fill up to the right level.
Always use the right kind of oil !
It is possible that your pump is fitted
with 3 plugs.
For oil check see 7.5.2
7.5.2 RW 40
Put the pump in a horizontal position so that 2
hexagonal socket screws are on top and one at
the bottom (see fig.7.3).
Unscrew the level plug (1) and the vent plug (2).
The oil level should be at the lower side of the openings
(see drawing). By turning the pump a bit this should be
visible.
If not so fill up to the right level.
Always use the right kind of oil !
Fig. 7.2
Fig. 7.3
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7.6 Oil change
Collection, storage and removal of the
oil should be done according to the
regulations of the local authorties.
When necessary replace the sealing rings.
Always use the right kind of oil !
(see chapter 7.3).
7.6.1 RW 20
Put the pump in a horizontal position so that one of oil
plugs is at the bottom ( fig.7.4 position B).
Remove the vent plug (2).
Put a receiving bin underneath the drain plug (1).
Remove the plug and drain the oil.
Rotate the pump so that the 2 openings are on top
(fig.7.4 position C).
Refill the oilhousing.
The oil level should be at the lower side of the openings.
(fig.7.4 position A).
Replace the plugs.
7.6.2 RW 40
Put the pump in a horizontal position so that the drain
plug (3) is at the bottom (Fig.7.5 position A).
Remove the vent plugs (1) and (2).
Put a receiving bin underneath the drain plug.
Remove the plug and drain the oil.
Replace the drain plug.
Refill the oilhousing.
The oil level should be at the lower side of the openings
(Fig.7.5 position A).
Replace the plugs.
Fig. 7.4
Fig. 7.5
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Operation &
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18/28 Edition 1HSC 02-W51 782-007-GB
7.7 Motor housing
7.7.1 RW 20
Unscrew the inspection plug of the motorhousing (see
Fig. 7.6 pos 1).
Put the pump in horizontal position with the inspection
opening downwards.
If water is present this will come out this way.
A small amount of water, due to condensation, is
permissable.
More water is an indication of leakage of
the construction. Oil is an indication of
seal failure between motorhousing and oil
chamber. If so, contact your dealer.
7.7.2 RW 40
Unscrew the inspection plug of the motorhousing.
This plug is found at the opposite side of the cable
entries (see Fig.7.7 pos 1).
Put the pump in horizontal position with the inspection
opening downwards. If water is present this will come
out this way.
A small amount of water, due to condensation, is
permissable.
More water is an indication of leakage of
the construction. Oil is an indication of
seal failure between motorhousing and oil
chamber. If so, contact your dealer.
Fig. 7.6
Fig. 7.7
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8. TRANSPORT AND STORAGE
The pump can be transported and stored in both
horizontal and vertical position.
Never lift the pump by the motorcable or
discharge hose. Always use the suspension
bracket !
In case of long storage, the pump must be protected
against moisture and heat.
Before storing the pump clean it with a water jet and
check the motor housing for water ingress (see chapter
7.7) .
On a regular base (every three months), turn the
impeller by hand, this is necessary to prevent
sticking of the mechanical seal surfaces (see Fig. 8.1).
After 6 months of storage, a general inspection is
advised, before installing the pump.
Follow the instructions of chapter 5.
9. OPTIONS
9.1 Waterdetector
As a safeguard against water ingress into the motor, the
pump can be equipped with a waterdetector.
When your pump is equipped with a waterdetector, this
can be found on the dataplate.
See appendix 1: at position 24 a “W” is stamped.
The waterdetector detects water which might have
entered the oilhousing or motorhousing due to seal
failure or cable damage.
The waterdetector causes the pump to switch off,
before damage to the motor is done.
The probe itself is a non active electrode, placed in oil-
and motorhousing. It is used in conjuction with a relay in
the control circuit that measures the resistance between
probe and frame.
If only air or oil is present, the resistance is over
5000 Ohm. If water enters, the resistance will
decrease to as low as 300 to 500 Ohm
We advise to use OMRON relay 61 F-GP
or an equivalent.
This relay switches at 5000 ohm.
No water present:
-high resistance between terminals 1and 7
(>5000 Ohm)
-terminals 2 and 4 closed
-terminals 3 and 4 open
Fig. 8.1
Fig. 9.1
electrode
frame
oil
water
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Operation &
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20/28 Edition 1HSC 02-W51 782-007-GB
Water present:
-low resistance between terminals 1 and 7
(300-500 Ohm)
-terminals 2 and 4 open
-terminals 3 and 4 closed
9.2 Thermoswitches
When your pump is equipped with thermoswitches,
a “T” is stamped at position 24 on the dataplate.
(see appendix 1). A copy of your dataplate is on page 2.
For connection values see par. 5.4.
9.3 Thermistors
In stead of thermoswitches, the pump can be equipped
with thermistors (on special request).
This will be marked with a “U” on the dataplate at
position 24 .
Normally the resistance is about 200-500 Ohm.
When the switch-off temperature is reached the resist-
ance will be between 1650-4000 Ohm.
The maximum voltage is 7.5V.
A thermistor is not a circuit breaker but a
resistance.
9.4 Cable protection
When chemical or mechanical protection for the
cable is needed a tube can be fitted around the
cable (Fig. 9.2 pos 1).
This is a flexible stainless steel tube (1) connected to a
special cable entry (Fig.9.2 pos 2).
When your pump is equipped with a cable protection, a
“3” is stamped on the dataplate at position 24. See
appendix 1
9.5 Special oil
Upon request the oil housing can be filled with
a special oil. If so, a label on the pump shows which
kind of oil is used.
Fig. 9.2
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Operation &
Maintenance Manual
Pump
RW-R
782-007-GB HSC 02-W51 Edition 121/28
10. TROUBLE SHOOTING
10.1 Safety
When working on the motor, make sure
that the power is switched off.
When working on the pump make sure it
cannot start unexpectedly!
Only qualified electricians may do the
electrical work.
When starting the pump ensure nobody
goes near rotating parts.
Observe local electrical and safety regulations!
PROBLEM
Pump does not start
Pump does not stop
Pump starts and
stops repeatedly
Current too high
Pump runs but
no flow or too
low flow
High level alarm
POSSIBLE CAUSE
No voltage on motor
terminals
Motor failure
No stop signal
Wrong start- and stop
level
Fault in power supply
Motor overloaded
Motor overheated
Fault in power supply
Pump failure
Clogging or air lock
Pump failure
Fault in power supply
Too low capacity
Pump failure
Fault in power supply
Motor failure
REQUIREDACTION
Check power supply
Check motor protection
Check start- and stop
signals
Check motor wiring
Check level regulation
Check level regulation
Check power supply
Check pump
Check cooling
Check motor
Check power supply
Check pump
Check dicharge and
coupling
Check pump
Check power supply
Check discharge
Check pump
Check power supply
Check motor
CHECKPOINTS
*No power
*Main isolator switch
*Fuses
*Earth leakage relay
*Motor protection relay
*Motor temperature
*Water detector
*Too low waterlevel
*Obstructed level switches
*Switches interchanged
*Controlpanel
*Continuity and isolation
*Phase resistance
*Float switches
*Controlpanel
*Obstructed level switches
*Adjust start- and stop level
*Power supply not stable
*Low voltage
*Not all 3 phases available
*Setting of motor protection
*Wrong direction of rotation
*Impeller blocked
*Protection in automatic reset mode
*Continuity and isolation
*Fuses
*Low voltage
*Impeller blocked
*Visc. or spec.gravity too high
*Wrong direction of rotation
*Discharge obstructed
*Valve fully or partly closed
*Air pocket in pump or discharge
*Coupling leaks
*Impeller or volute blocked
*Pump is sucking to much air
*Worn or broken impeller
*Controlpanel
*Fuses
*Low voltage
*Discharge obstructed
*Valve fully or partly closed
*Air pocket
*Impeller or volute blocked
*Pump is sucking to much air
*Worn or broken impeller
*Worn or broken bearings
*Fuses
*Controlpanel
*Continuity and isolation
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