Kolmeks SC-SERIES User manual

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OPERATING INSTRUCTIONS
CENTRIFUGAL PUMPS WITH INTEGRATED
FREQUENCY DRIVE
SC-SERIES

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Contents
1. General ..........................................................................................................................................................3
1.1 Symbols........................................................................................................................................................3
1.2 Fields of application......................................................................................................................................3
1.3 Limits of application and use ........................................................................................................................4
1.4 Manufacturer.................................................................................................................................................4
1.5 Version..........................................................................................................................................................4
2. Handling, transport and storage.................................................................................................................4
3. Design and function .....................................................................................................................................4
3.1 Construction..................................................................................................................................................4
3.2 Technical data ..............................................................................................................................................5
3.3 Pump identification .......................................................................................................................................6
4. Safety.............................................................................................................................................................7
4.1 Safety instructions ........................................................................................................................................7
4.2 Training.........................................................................................................................................................7
4.3 Elements of danger if safety regulations are not obeyed.............................................................................7
4.4 Safety instructions for inspection and assembly ..........................................................................................8
4.5 Operating the pump......................................................................................................................................8
5. Installation, introduction and start-up........................................................................................................8
5.1 Positions for installation................................................................................................................................9
5.2 Electrical connections...................................................................................................................................9
5.3 Control methods and connections..............................................................................................................10
5.3.1 I/O’s of the SC-pump (inputs and outputs)..............................................................................................10
5.3.2 Factory settings of terminals....................................................................................................................11
5.3.3 SCA-pump –speed reference from the display ......................................................................................11
5.3.4 SCB-pump –constant pressure in between the pump flanges...............................................................12
5.3.5 SCC-pump - constant pressure in between inlet- and outlet-line ...........................................................12
5.3.6 SCCVAK-pump –with external controller in use.....................................................................................13
5.3.7 SCCVAK-pump –with controller of frequency drive in use.....................................................................14
5.3.8 SCD-pump –constant pressure in outlet flange......................................................................................14
5.3.9 SCF-pump –constant temperature.........................................................................................................15
5.3.10 SCG-pump –controlled by external system..........................................................................................15
5.3.11 SCM-pump –controlled by MODBUS RTU –bus connection ...............................................................16
5.3.12 Local control panel.................................................................................................................................16
6. Service, spare parts and troubleshooting................................................................................................17
6.1 Shaft seals..................................................................................................................................................17
6.2 Other parts..................................................................................................................................................18
6.3 Troubleshooting..........................................................................................................................................19
6.4 Checking of alarm history...........................................................................................................................23
6.5 Alarm and fault codes.................................................................................................................................23
7. Declaration of Conformity .........................................................................................................................24
8. ANNEX: wiring diagrams SCA … SCM............................................................................................... 25-33

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1. General
1.1 Symbols
Warns that failure to observe the
precaution may cause personal
injury or damage to property.
Warns that failure to observe the
precaution may cause electric shock.
Indicates something to be noted by the reader.
1.2 Fields of applications
The most common applications are heating, air condition, cooling systems. Also heat exchangers, pressure
boosting systems, district heating systems, ice halls, public baths and industrial processes.
1.2.1 AE_-, L_-, AL_- pumps
Clean, thin, non-aggressive liquids.
- circulating water in for heating and cooling systems
- water-glycol mixtures
1.2.2 AEP-, LP-, ALP- pumps
Clean, thin, slightly aggressive liquids.
- domestic hot water, oxygen rich waters, sea water, etc.
1.2.3 LH-, ALH- pumps
- as in L- and AL -series, but nominal pressure 16 bar
1.2.4 LS-, ALS- pumps
Aggressive, thin, not bigger solid particles containing liquids
- in addition to above mentioned liquids various acids, salts, oxidizing and chemically active organic fluids
ATTN!

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1.3 Limits of application and use
Nominal pressure: AE-, AEP-, L-, AL-, ALP- pumps: 10 bar
LH-, ALH-, LS- and ALS-pumps: 16 bar
Medium temperature range: -10 ... + 90 °C
Ambient temperature: 0 ... +40°C (diurnal average max. +35°C)
Suitability of materials and seals for pumped liquid shall be always checked between purchaser and supplier.
The nominal pressure and the max. temperature of pumped liquid are stamped on the pump rating plate. Never
use the pump in any other application or conditions without manufacturer’s acceptance. In the case of damage
there may be danger to persons by having poisoning, burns, wounds etc. depending on the pumped liquid and
it’s temperature and pressure. The pump surface temperature may cause danger depending on the working
conditions.
1.4 Manufacturer
This product is manufactured by KOLMEKS OY, P.O.BOX 27, FIN-14201 TURENKI, FINLAND.
1.5 Version
Release date of this manual is 01.03.2014. This is version no. 1.
2. Handling, transport and storage of the pump
Normally the pumps are stable when they are transported and don’t go down even they are bent 10°. Pumps
shall be stored in a dry and cool place protected from dust. Temperature of environment must be in
-10 °C...+50°C. It is not allowed to lift the pump from frequency converter. In the case of longer storage time or
the pump serves as a stand-by, it is recommended to rotate the pump manually eg. from the motor fan at least
once a month.
3. Design and function
3.1 Construction
The pump and motor constitute a unit, where the rotating parts of both the pump and the motor are on the same
shaft (mono-block design). The motor is of a dry type and the frequency converter is integrated to the electric
motor.
ATTN!
ATTN
!

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Electric motor: Totally enclosed, fan cooled A.C. motor, with frequency converter.
Protection form: IP54
Insulating class: F
3.2 Technical data
Pump
Connection
Hz
Nominal
power
Supply
current A
Weight
type
max
P2n kW
1 x 230 V
kg
AE-20/4SC
3/4"
50
0,08
1,1
14
AE-25, -26/4SC
1"
50
0,08
1,1
14
AE-25, -26/4SC
1"
65
0,2
2,1
15
AE/AEP-25,-26/2SC
1"
50
0,65
6,0
19
AE-32,-33/4SC
1 1/4"
50
0,2
2,1
20
AE-32,-33/4SC
1 1/4"
60
0,37
3,6
35
L-32A/4SC
DN32
50
0,08
1,1
18
L-32A/4SC
DN32
65
0,2
2,1
19
L-32A/2SC
DN32
50
0,65
6,0
23
L-40A/4SC
DN40
50
0,2
2,1
24
L-40A/4SC
DN40
60
0,37
3,6
39
L-50A/4SC
DN50
50
0,2
2,1
27
L-50A/4SC
DN50
60
0,55
4,6
42
L-65A/4SC
DN65
50
0,55
4,6
47
L-65A/4SC
DN65
50
0,75
6,1
47
L-80A/4SC
DN80
50
0,55
4,6
48
L-80A/4SC
DN80
50
0,75
6,1
48
AL-1102/4SC
DN100
50
0,75
6,1
58
Noise level of all pump types is under 70 dB (A, 1 m). Weight is without transmitter.

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3.3 Pump identification
AL - 110 2 / 4 SC B
L P - 50 A / 4 SC C
Pump series:
AE-, L-, AL-
Material of pump housing, sealing flange and
impeller:
no letter = grey cast iron EN-GJL-200 / 10 bar
H = nodular cast iron EN-GJS-400 / 16 bar
P = bronze CuSn10 / 10 bar
S = stainless steel AISI 316 / 16 bar
Flange size, DN-size:
20 = 3/4”
25 = 1”
32 = DN 32
40 = DN 40
50 = DN 50
65 = DN 65
80 = DN 80
110 = DN 100
Poles of the electric motor:
2 = rotation speed 50 r/s (50 Hz)
4 = rotation speed 25 r/s (50 Hz), rotation speed 30
r/s (60 Hz), rotation speed 32.5 r/s (65 Hz)
SC = SC - the frequency converter is integrated
to the pump:
SCA, SCB, SCC, SCD, SCF, SCG, SCM (check 5.3
Control methods and connections)
(1/4) => SCB ja SCC: 1 = measure range of
differential pressure [bar], 4 = measure range of
pressure transmitter [bar]
Pump type
Motor code
Impeller size
Electrical power at duty point
Duty point, Max. medium temperature
Motor type
Nominal voltage and current
Rotating speed range, isolating and enclosure
glass
Serial number, Nominal pressure
Different material of impeller:
PM = Bronze CuSn10
SS = Stainless steel AISI316
Markins for accessories:
T = external mechanical seal for aggressive medium
H = flush for mechanical seal
KT = double mechanical seal
Sn = different mechanical seal
Kn = different surface treatment
Phases, frequency and duty
typetötapa
Nominal shaft power
Bearing types, CE -marking
Manufacturer, country of origin

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4. Safety
This manual includes important information concerning installation and operating the pump. Persons
who are involved in installation or/and operation of the pump, should read and understand these
instructions before installation or starting the pump.
There are live parts inside the frequency converter of the SC -pump, when the supply voltage is connected.
Incorrect installation of SC –pump may cause damage to the pump or bodily injuries, even death. Touching the
live parts may be mortal even the supply voltage is disconnected. Obey instructions of this
manual and national and local requirements and standards.
Wait at least 10 minutes!
- installation must be protected by fuses and insulated correctly.
- covers and cable inlets (EMC –type) must be installed.
It is user’s or certified electrician’s responsibility to ensure the correct earthing and protection in accordance
with applicable national and local requirements and standards.
4.1 Safety instructions
1. SC-pump must be disconnected from the mains if repair work is to be carried out. Check that the mains supply
has been disconnected and necessary time has passed (at least 10 minutes).
2. The device must be connected correctly to the earth. User must be protected from supply voltage and the
pump must be protected from short circuit according to the national and local requirements and standards. The
overload protection is included in SC -pump.
3. Earth leakage is more than 3,5 mA. It means, that installation of supply cable must be fixed.
4.2 Training
The persons who have responsibility for installing or/and operating the pump, should be trained.
4.3 Elements of danger if safety regulations are not obeyed
If the safety regulations are not obeyed, personal injuries or damage to the pump or related devices may occur.
Valid safety instructions must be obeyed.
ATTN!

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4.4 Safety instructions for inspection and assembly
It is user’s responsibility to ensure that persons who carry out inspections and installations are qualified experts
and familiarized themselves with these instructions carefully.
4.5 Operating the pump
Working safety of the delivered pump and related devices can be ensured only if these devices are operated
according to the section 1.2 Fields of application and 1.3 Limits of application and use of this manual.
5. Installation, introduction and start-up
The pump can be installed to the piping without separate supporting.
The position of the motor unit with the frequency converter can be changed by removing the motor unit from the
pump housing and setting it to the desired position with certain limitations.
When installing the pump pay attention to the following:
- space enough for service and inspection of the pump
- free visibility to the display of the potentiometer
- free visibility to the rating plate of the pump.
- possibility to use lifting mechanism if needed
- shut-off valves on the both sides of the pump
- the frequency converter is not too close hot pipes.

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5.1 Positions for installation
Allowed positions
Not allowed positions
5.2 Electrical connections
All electrical work shall be carried out by qualified electrician approved by the local authorities.
Supply voltage may be connected with standard cable, screened cable is not required. Ensure the nominal
voltage of the electric motor corresponds the local supply voltage.
Use always screened control cables.
Before starting the pump fill and vent the system. Make sure that the pump rotates freely by rotating it manually
eg. from the motor fan. Never start or let the pump run dry. The warranty doesn’t cover failures in the mechanical
seal caused by dry running. Before starting the pump fill and vent the system. After starting make sure that there
is no extra noise coming from the pump and that no leakages appear.
5.3 Control methods and connections
ATTN!
ATTN!

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5.3.1 I/O’s of the SC-pump (inputs and outputs)
Terminal 4 programmable analog input 4-20 mA, 0-5 VDC, 0-10 VDC (voltage /
current selected by the switch)
Terminal 2 programmable analog input 0-5 VDC, 0-10 VDC
Terminals STF, STR, RH, RM, RL programmable digital inputs
Terminal PC 24 VDC supply for digital inputs and feedback (max. 100 mA)
Terminal 10 5 VDC supply for potentiometer
Terminal 5 signal ground
Terminal AM / 5 programmable analog output 0-10 VDC
Relay output, terminals A,B,C relay output (different possible functions), potential free change-over
contacts
max. 230 VAC / 0.3 A, cos fi 0.4,
max. 30 VDC / 0.3A
Transistor output, terminals RUN, SE load 27 V / 0.1 A, voltage loss 3.4 V.
Terminals of the measure card (when SCB-, SCC- and SCCVAK –pump with two pressure transmitters):
Terminal 1 Supply voltage for higher pressure transmitter +24VDC
Terminal 2 Feedback signal of higher pressure transmitter (-)
Terminal 3 Supply voltage for lower pressure transmitter +24VDC
Terminal 4 Feedback signal of higher pressure transmitter (-)
Terminal 5 Analog output 0-10VDC (differential pressure) connected to VSD analog input terminal 4 (+)
Terminal 6 Analog output 0-10VDC (differential pressure) connected to VSD analog input terminal 5 (-)
(signal ground)
Terminal 7 Supply voltage for measure card +24VDC
Terminal 8 +24VDC for VSD digital input to terminal STF
Terminal 9 24VDC for VSD digital input to terminal RL
Terminal 10 Siagnal ground from VSD terminal SD

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5.3.2 Factory settings
Terminal 4: programmed as feedback 4-20 mA or not in use (depending on selected control method)
Terminal 2: 0-10 VDC reference for frequency (speed control) or reference for PI –controller (depending on
selected control method)
Terminal STF: in between terminals PC –STF open/closed (or measure card terminal 8 –STF) = pump off/on
Terminal STR: Not in use
Terminal RH: Dry running protection in SCD –version
Terminal RM: Jogging operation. PC –RM open/closed = normal operation / pump is running forced 40 Hz
frequency.
Terminal RL: Control mode selection: PC –RL (or measure card terminal 9 –RL) open/closed = Direct speed
reference (e.g. SCG) / Closed loop control (e.g. SCC)
Terminal AM / 5: Analog output 0-10 VDC. In versions SCCVAK (with external controller in use) and SCG
programmed as frequency. In version SCB, SCC, SCCVAK (with inverter controller in use), SCD and SCF
programmed as feedback.
Relay output, Terminals A, B, C: Programmed as alarm. Terminals A and C are connected when pump is
running normally or is in stand by (voltage connected, terminals PC –STF open). Terminals B and C are
connected when there is alarm or the main supply voltage is disconnected.
5.3.3 SCA-pump –speed reference from the display
Applications
Systems, where the duty point remains constant and where is no need for continuous automated regulation.
Accessories
Pump and frequency converter.
Operation principle
The speed of electric motor can be adjusted manually at the site during commissioning of the pump. The pump
will run with constant speed. The required speed is selected with potentiometer and then it is saved by pushing
button SET. When pump is running, the present motor current (A) or frequency (Hz) can be selected to the
display by pushing SET -button.
Pump curve
QH-curve of the pump is equal with that of single speed pump.
Standard control connections (see ANNEX 8.1 SCA-wiring diagram), PU / EXT COMBINED OPERATION
MODE

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5.3.4 SCB-pump –constant pressure between the pump flanges
Applications
Systems, where are variations in the flow and where pressure losses are generated mainly on the consumption
equipment. Heating circulation, where the pressure loss on the heat equipment is small.
Accessories
Pump, frequency converter, 2 pcs of pressure transmitters installed to the pump flanges.
Operation principle and flow adjustment
The level of the constant pressure difference between the pump flanges can be adjusted by the buttons of
frequency drive (parameter 133). By pushing button MODE, opens parameter submenu P.xxx. Parameter P.133
is selected with the potentiometer By pushing SET –button, appears value of the parameter 133 to the display
which is reference for PI –controller (constant differential pressure). It is percents of max. measuring value. The
required reference value can be adjusted by the potentiometer. It is saved by pushing SET –button. By pushing
button MODE twice, starting situation is achieved. When pump is running, the present motor current (A),
feedback (%) or frequency (Hz) can be selected to the display by pushing SET-button. Unauthorized operating
of the display can be prevented by locking it by pushing MODE –button 2 seconds. Unlocking is done in a same
way.
Pump curve
QH-curve of the pump is controlled to a horizontal line, which is suitable for systems with low pressure loss
share in heat exchanger compared to the total pressure loss.
Standard control connections (see ANNEX 8.2 SCB-wiring diagram), PU / EXT COMBINED OPERATION
MODE
5.3.5 SCC-pump - constant pressure in between inlet- and outlet-line
Applications
Systems, where are variations in the flow and where pressure losses are generated mainly on the source of heat
equipment. Heating and cooling circulations and the pressure boosting of parellel circulations.
Accessories
Pump, frequency converter and 2 pcs of pressure transmitters. Another transmitter to be installed to the suction
or pressure flange of the pump and another one on to the system inlet or outlet pipe.
Operation principle and flow adjustment
The level of the constant pressure difference between the pump flanges can be adjusted by the buttons of
frequency drive (parameter 133). By pushing button MODE, opens parameter submenu P.xxx. Parameter P.133
is selected with the potentiometer By pushing SET –button, appears value of the parameter 133 to the display
which is reference for PI –controller (constant differential pressure). It is percents of max. measuring value. The

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required reference value can be adjusted by the potentiometer. It is saved by pushing SET –button. By pushing
button MODE twice, starting situation is achieved. When pump is running, the present motor current (A),
feedback (%) or frequency (Hz) can be selected to the display by pushing SET-button. Unauthorized operating
of the display can be prevented by locking it by pushing MODE –button 2 seconds. Unlocking is done in a same
way.
Pump curve
QH-curve of the pump is controlled to a quadratic. The relation of pressure loss in the source of heat (cold) to the
loss in the system defines the shape of the curve. When the losses in the heat exchanger are large part of the
whole losses in the system the curve is more steep.
Standard control connections (see ANNEX 8.3 SCC-wiring diagram), PU / EXT COMBINED OPERATION
MODE
5.3.6 SCCVAK-pump - constant pressure between supply- and return-line with external
controller in use
Operation principle (speed reference 0-10 VDC from external controller)
The level of the constant pressure difference between the inlet- and outlet-line of the system can be adjusted by
external control system.
Flow adjustment and balancing the system
Before adjusting and balancing the system the differential pressure transducer is connected to the external
control system. The main control valve must be opened as open as possible and then the flow is adjusted by
giving the reference for differential pressure to external controller. Alternatively the flow adjustment can be done
in SCA –connection (5.3.3 SCA-pump –speed reference from potentiometer). The flow is adjusted by selecting
the correct frequency. When the system has adjusted and balanced, the value of the pressure difference is read
and saved to the control system as a reference value.
Another alternative is to get correct reference value for differential pressure by running the pump in SCC-
connection (5.3.5 SCC-pump - constant pressure in between inlet- and outlet-line). Wire jumper must be fixed in
between terminals PC and RL (PI –controller in use). When the system has adjusted and balanced, the
reference value of the pressure difference is read from parameter 133 which is programmed as reference value
for external controller.
Standard control connections (see ANNEX 8.4 SCCVAK-wiring diagram- with external controller in use),
EXT OPERATION MODE

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5.3.7 SCCVAK-pump - constant pressure between supply- and return-line with
controller of the frequency converter in use
Operation principle (reference for pressure difference 0-10 VDC from external control system)
The level of the constant pressure difference between the inlet- and outlet-line of the system can be adjusted by
external control system (reference for differential pressure 0-10 VDC). Connections are the same as in SCC –
pump, however, the reference is fed from the external control system in between terminals 2 and 5. Parameter
133 must be selected 9999.
ATTENTION! If external control sytem is not in use when pumping is needed, select the required reference for
differential pressure with parameter 133 (check 5.3.5 SCC-pump - constant pressure in between inlet- and
outlet-line).
Standard control connections (see ANNEX 8.5 SCCVAK-wiring diagram- with controller of the frequency
drive in use), PU / EXT COMBINED OPERATION MODE
5.3.8 SCD-pump - constant pressure in discharge (pressure boosting)
Applications
Pressure boosting or other open systems, where constant pressure is required.
Accessories
Pump, frequency converter and pressure transmitter. The pressure transmitter is installed
to the pressure flange of the pump or near to the consumption in the pipe line.
Operation principle
The level of the constant pressure in discharge can be adjusted by the buttons of frequency drive (parameter
133). By pushing button MODE, opens parameter submenu P.xxx. Parameter P.133 is selected with the
potentiometer By pushing SET –button, appears value of the parameter 133 to the display which is reference for
PI –controller (constant pressure). It is percents of max. measuring value of the pressure transducer (mentioned
in transducer). The required reference value can be adjusted by the potentiometer. It is saved by pushing SET –
button. By pushing button MODE twice, starting situation is achieved. When pump is running, the present motor
current (A), feedback (%) or frequency (Hz) can be selected to the display by pushing SET-button. Unauthorized
operating of the display can be prevented by locking it by pushing MODE –button 2 seconds. Unlocking is done
in a same way.
Standard control connections (see ANNEX 8.6 SCD-wiring diagram), PU / EXT COMBINED OPERATION
MODE

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5.3.9 SCF-pump - constant temperature
Applications
Heating and cooling systems, where the constant temperature is required by adjusting the flow.
Accessories
Pump, frequency converter and temperature transmitter (and sensor).
Operation principle
The level of the constant temperature in discharge can be adjusted by the buttons of frequency drive (parameter
133). By pushing button MODE, opens parameter submenu P.xxx. Parameter P.133 is selected with the
potentiometer By pushing SET –button, appears value of the parameter 133 to the display which is reference for
PI –controller (constant temperature). It is percents of max. measuring value of the temperature transducer
(mentioned in transducer). The required reference value can be adjusted by the potentiometer. It is saved by
pushing SET –button. By pushing button MODE twice, starting situation is achieved. When pump is running, the
present motor current (A), feedback (%) or frequency (Hz) can be selected to the display by pushing SET-button.
Unauthorized operating of the display can be prevented by locking it by pushing MODE –button 2 seconds.
Unlocking is done in a same way.
ATTENTION! When ordering the pump, the response of the control must be informed. In the heating system the
response is normal, in the cooling system inverse. Normal, the pumping goes down, when the temperature
(feedback) goes up, inverse, the pumping goes up, when the temperature (feedback) goes up (par. 128 =>
normal = 20, inverse = 21).
Standard control connections (see ANNEX 8.7 SCF-wiring diagram), PU / EXT COMBINED OPERATION
MODE

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5.3.10 SCG-pump - controlled by external system
Applications
Systems, where are variations in the flow and/or where the flow is controlled mainly with the pump. The pump is
controlled by an external system or controller.
Accessories
Pump and frequency converter.
Operation principle
The speed reference for pumps is given from external control system, external controller, process control, etc
ATTENTION!! If the external control system is not in use when pumping is needed, PU / EXT COMBINED
OPERATION is selected by the parameter 79 (par.79: 0=>3). Then constant speed can be selected according to
5.3.3 SCA-pump –speed reference from the display.
Standard control connections (see ANNEX 8.8 SCG-wiring diagram - with external controller in use), EXT
OPERATION MODE
5.3.11 SCM-pump –controlled by MODBUS RTU –bus connection
Applications
Systems, where are variations in the flow and/or where the flow is controlled mainly with the pump. The pump is
controlled by an external system or controller.
.
Accessories
Pump and frequency converter.
Operation principle
All control, adjusting and indications are taken care with MODBUS RTU –bus connections.
Standard control connections (see ANNEX 8.9 SCM-wiring diagram - MODBUS RTU –bus connection),
NET OPERATION MODE
5.3.12 Local Control Panel
The SC -pump optionally features a separate cable connected Local Control Panel, which makes up the
complete interface for operation and monitoring of the SC -pump. If the pump is located such as the display is
hard to see, it helps the parameterizing of the frequency converter.

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6. Service, spare parts and troubleshooting
The pump doesn’t need any regular servicing. As a shaft seal is used an adjustment free mechanical seal. It is a
wearing part which has to be replaced if it starts to leak. Note that few drops leakage per hour can be quite
normal especially when coolants (eg. glycol) are pumped.
6.1 Shaft seals
Pump type Shaft O-ring
mm mm
AE_-25/-26 SC_ 12 123x2,5
L_-32A SC_ 12 100x2,5
L_-40A, AE_-32/-33 SC_12 145x2,5
L_-50A SC_ 12 150x3
L_-65A, L_-80A, AL -1102 SC_18 179,3x5,7
1 Rotating ring
2 Stationary ring
3 Body / bellows
4 Spring
5 O-ring
The motor is equipped with ball bearings which are lubricated for life and therefore do not need any service. In
the case of any motor malfunction it is recommended to replace the whole motor unit.

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6.2 Other parts
1 Electric motor
2 Pump housing
3 Impeller
5 Sealing flange
8 Foot (not always)
24 Screw or nut
25 Washer
26 Key
40 Shaft seal
50 O-ring or gasket
60 Screw or nut
67 Screw
80 Pipe union (L- and ALH -serie)
81 Pipe union (L- and ALH -serie)
86 Cooling pipe (L- and ALH -serie)
103 Frequency converter
111 Fixing plate (SCB, SCC)
112 Pipe joints (SCB, SCC)
113 Pipes (SCB, SCC)
114 Transmitter(s) for pressure, pressure
difference or temperature (SCB, SCC,SCD, SCF)
115 Cable (SCB, SCC, SCD, SCF)
117 Screws (SCB, SCC)
WHEN ORDERING SPARE PARTS, PLEASE SPECIFY THE TYPE IDENTIFICATION, SERIAL NUMBER,
THE SIZE OF THE IMPELLER, THE MOTOR TYPE AND POWER AND THE POSITION NUMBER OF THE
SPARE PART.
ATTN!

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6.3 Troubleshooting
Trouble
Fault
Fixing
Shaft seal is
leaking.
Wearing.
Change the seal.
Pump has run dry.
Change the seal.
Pump doesn’t
run.
The shaft of the pump is blocked.
Check the free rotation of the shaft by
turning the motor fan. If required, loosen
the motor unit from the pump housing and
repair the cause of the block.
Fuses have worked.
Repair the cause of the fault. Change the
fuses. If necessary, call the expert.
No electricity.
Check and repair connections. If
necessary, call the expert.
The disorder has stopped the pump.
Reset the pump by disconnecting the
supply voltage at least for 10 seconds.
Control wiring is not correct.
Check the wiring in accordance with the
control diagram. Between terminals PC-
STF must be jumpered or closed switch.
The parametres of the frequency
converter are changed or the pump is
stopped with local control panel.
Correct the parameters or start the pump
with the local control panel (not included
in standard delivery). If necessary, call the
expert.
The frequency converter or electric
motor is damaged.
Replace the frequency converter and/or
electric motor with a new one. Contact to
Kolmeks.
If the pump is operated when
cover of the frequency converter
is open, the special carefulness
must be observed.
Pump stops by
itself or runs
irregular and
noisy.
The supply voltage is defective. One
phase is possible missing.
Check the supply voltage. Check and
repair fuses and connections of the
cables.
The frequency converter or electric
motor is damaged.
Replace the complete motor unit with
frequency converter with a new one.
Contact to Kolmeks.
ATTN!

20/33
SC-pumps Manual Rev 2.docx Subject to change without prior notice.
Trouble
Fault
Fixing
The pump is running
with minimum
frequency.
The reference value is missing or
in minimum.
Adjust the correct value with the
buttons of the local control panel (if
intention to use the local reference
as source of the reference). Check
and correct the reference if the
reference is given by external
controller.
The pipes of the pressure or
differential pressure transducer are
blocked or incorrectly
connected.
Check and repair the connections
and blockings of the pipes. Open
the possible valves, which are
installed to the pipes.
The signal of the feedback
transmitter (pressure or
temperature) is too high.
Possible short circuit.
Disconnect the cable from the
transmitter, the speed should
increase, if there is a fault in
transmitter or the signal (not SCF
cooling system). Check the
connections, transmitter. If
necessary, replace the transmitter
with the new one.
The mechanical or electrical
connections of the temperature
transmitter of the SCF -pump are
incorrect or the transmitter
is damaged.
Check and repair of the
connections or the transmitter.
Parameters of the SCF -pump are
wrong (cooling and heating pumps
have different parameters)
Check and correct the parameters.
If necessary, call the expert.
SCB or SCC –pump: The lower
pressure transmitter gives the full
signal (20 mA) or the higher
pressure transmitter gives no
signal.
Check the connections and
transmitters. Measure the signals
of the transmitter and if needed,
change the transmitter.
The pump is running only with
the maximum frequency, which
don’t vary in accordance with
the requirements of flow
changes.
Reference signal is too high.
Adjust the correct value with the
buttons of the local control panel (if
intention to use the local reference
as source of the reference). Check
and correct the reference if the
reference is given by external
controller.
Feedback transmitter is missing or
the signal is wrong
Check and repair the feedback
signal and/or
connections. If necessary, replace
the transmitter
with the new one.