FLOWTECH flowboost G.V User manual

1
First Publication Date: 01/09/2020
Revision:
Revision Date:
OPERATION AND
MAINTENANCE MANUAL
G.V Pump Manual

Definitions of Safety Warnings and
Precautions
WARNING!
Indicates a potentially hazardous situation which, if
not avoided, can result in serious injury or death.
 CAUTION!
Indicates a potentially hazardous situation which, if
not avoided. Can result in minor to moderate injury, or
serious damage to the product.
General
Information
These instructions are to assist in the installation of the flowboost G.V Pump please follow
them carefully.
If, having read this Operation & Maintenance Manual, there is any doubt about any aspect of
the installation please don't hesitate to contact our technical team.
2

Safety
Information
It is essential that correct and safe working practices are adhered to at all times when installing,
operating and/or maintaining any piece of equipment. Always consult safety data sheets, operating
and maintenance manuals, Health & Safety legislation and recommendations and specific
requirements of any equipment manufacturer, site controller, building manager or any other persons
or organisation relating to the procurement, installation, operation and/or maintenance of any piece
of equipment associated or in conjunction with any product provided by flowech Water Solutions.
This document is intended for ALL installers, operators, users and persons carrying out maintenance
of this equipment and must be kept with the equipment, for the life of the equipment and made
available to all persons at all times. Prior to carrying out any work associated with the set it is essential
that the following sheets are read, fully understood and adhered to at all times.
Equipment must only be installed, operated, used, and/or maintained by a competent person. A
competent person is someone who is technically competent and familiar with all safety practices
and all of the hazards involved.
Any damage caused to any equipment by misapplication, mishandling or misuse could lead to risk of
Electrocution, Burns, Fire, Flooding, death or injury to people and/or damage to property dependent
upon the circumstances involved. flowech Water Solutions accepts no responsibility or liability for
any damage, losses, injury, fatalities or consequences of any kind due to misapplication, mishandling
or misuse of any equipment, or as a result of failure to comply with this manual.
Failure to install, operate, use or maintain the equipment in accordance with the information contained
within this document could cause damage to the equipment and any other equipment subsequently
connected to it, invalidating any warranties provided by flowech Water Solutions to the buyer.
flowboost G.V Pump Manual
3

Safety Warnings &
Precautions
These instructions should be read and clearly understood before working on the system. Please
read this manual carefully and all of the warning signs aached before installing or operating the
equipment keep this manual handy for your reference. This equipment should be installed, adjusted
and serviced by trained and qualified personnel. Failure to observe this precaution could result in
bodily injury.
WARNING! - Install an emergency stop key separately from the isolator. Rotating
shas can be hazardous.
WARNING! - This equipment has a high leakage current and must be permanently
fixed to earth.
WARNING! - Do not aach or remove wiring or connectors when the power is applied.
Do not check signals during operation. When the power is turned on and the running
command is on, the motor will start rotating. The stop key is only eective when the
function is set. If there is a power failure and an operation instruction is given the unit
may start automatically when the power is reinstated.
WARNING! - Make sure that the input voltage is correct. Be sure to install the unit in
a room that is not exposed to direct sunlight and is well ventilated.
Avoid environments which have a high ambient temperature, high humidity or
excessive condensation. Avoid dust. Corrosive gas, explosive gas, inflammable gas,
grinding-fluid mist and salt damage, etc.
WARNING! - Do not connect the power source to any terminals except power
connectors.
WARNING! - Motor control equipment and electronic controllers are connected to
hazardous line voltages. When servicing drives and electronic controllers, you may be
exposed to components at or above the line potential. Extreme care should he taken
to protect against shock. Dangerous voltage may exist aer the power light is o.
Wait more than 5 minutes aer turning o the power supply before performing
maintenance or inspection. Hazard of electric shock. Disconnect incoming power
before working on this unit.
WARNING! - The inverter should be protected separately against ground fault.
Observe the regional regulations for electrical installation!
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Customer / Contractor
RESPONSIBILITIES
It is the responsibility of the customer and/or the contractor:
• To ensure that anyone working on the equipment is wearing all necessary protective gear
and/or clothing.
• Is aware of appropriate health & safety warnings.
• Has read the information in this section of the manual.
CAUTION! - It is strongly recommended that all electrical equipment conforms
to National Electrical Codes and local regulations. Only qualified personnel should
perform installation, alignment and maintenance. The manufacturer reserves the right
to alter the technical data in order to make improvements or update information.
CAUTION! - Failure to observe these rules will render the guarantee invalid. The same
applies to repair jobs and/or replacement. Your legal rights are not aected.
CAUTION! - The manufacturer declines all responsibility in the event of damage or
injury caused as a result of tampering with the equipment.
CAUTION! - Do not switch on/o power supply to run/stop the motor/system! Start
the unit only by using run buon or external run command.
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flowboost G.V Pump Manual
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Protecting the environment
Observe the local regulations and codes regarding:
Reporting of emissions to the appropriate authorities.
Sorting, recycling and disposal of solid or liquid waste.
Clean-up of spills.
Exceptional sites
Radiation Hazard
Do NOT send the product to Flowtech Water Solutions if it has been exposed to nuclear radiation, unless
Flowtech Water Solutions has been informed and appropriate actions have beenagreed upon.
Recycling guidelines
Always follow local laws and regulations regarding recycling.
Waste and emissions guidelines
Do not dispose of equipment containing electrical components together with domestic waste.Collect it
separately in accordance with local and currently valid legislation.
Warranty
For information about warranty, see the sales contract
Spare parts
Only use original spare parts to replace any worn or faulty components. The use of unsuitablespare parts may
cause malfunctions, damage, and injuries as well as void the guarantee.
For more information about the product’s spare parts, refer to the Sales and Service department.
Storage and Transportation
Inspect the package
Inspect the package for damaged or missing items upon delivery.
Note any damaged or missing items on the receipt and freight bill.
File a claim with the shipping company if anything is out of order.
If the product has been picked up at a distributor, make a claim directly to the distributor.
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and vibrations.
Protect the product against humidity, heat sources, and mechanical damage.
Do not place heavy weights on the packed product.
Refer also to par. 3.5 for storage limits.
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Inspect the unit
Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
Inspect the product to determine if any parts have been damaged or are missing.
If applicable, unfasten the product by removing any screws, bolts, or straps. For your personal safety, becareful
when you handle nails and straps.
Transportation guidelines
Stay clear of suspended loads.
Observe accident prevention regulations in force.
Do not damage the cables during transport; do not squeeze, bend or drag the cable.
Always keep the cable ends dry.
Secure the unit against tipping over and slipping until it is mounted and fixed in its finallocation.
Li and handle the product carefully, using suitable liing equipment (stacker, crane, cranemounting device,
liing blocks, sling ropes, etc.).
Always li the unit by its liing handle.
System liing
Assembled units and their components are heavy. Failure to properly li and support this equipment can
result in serious physical injury and/or equipment damage. Li equipment onlyat the specifically identified liing
points. Liing devices such as eyebolts, slings, and spreadersmust be rated, selected, and used for the entire
load being lied.
Select the liing points depending on model (see Figure 1).
Always li the unit by its liing points.
Use suitable liing equipment and ensure that the product is properly harnessed.
Wear personal protective equipment.
Stay clear of cables and suspended loads.
Liing diagrams
Figure 1: Liing
flowboost G.V Pump Manual
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Product Description
Figure 2 and Figure 3 show a typical single-pump and multi-pump system using the unit.
When the system is connected directly to the water supply use a low-pressure switch on the suction side.
Figure 2: Single-pump system
Figure 3: Multi-pump system
Pump with e-SM Motor Drive
Diaphragm pressure tank
Distribution panel
On-o valve
Non-return valve
Low water control
Pressure gauge
Pressure sensor
Drain tap
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Pressure tank
A diaphragm pressure tank is used on the discharge side of the pump to maintain pressure in the pipes
when there is no water demand. The unit stops the pump from continuing to run at zero demand and reduce
the size ofthe tank that is required for supply purposes.
The tank must be permied and suitable for systems pressure.
Tank selection
Variable speed pressure booster sets can operate with smaller tanks compared to traditional systems. As a
rule, atank with a capacity in liters amounting to about 10% of the flow rate of a single pump expressed in
liters per minute is sucient. The required water volume may be distributed among multiple tanks.
Product function and use
In its standard version, the product is a booster unit set which consists of identical variable speed electric
pumps that are connected in parallel. The pumps are mounted on a common stand, suction and delivery
manifolds, on-o valves, non-return valves, pressure gauge, pressure transmiers, and a single-phase or three-
phase control panel.
The system must be equipped with a membrane tank. The delivery manifold is fied with couplings that
are designed for the installation of 24 L tanks with an on-o valve. Along with the tanks, provide a applicable
manifoldsupport.
Extra floor-standing tanks may be installed and connected to the manifold.Intended use
The product can be used to pump:
Cold water
Refer to the standard Installation, Operation and Maintenance Manual for pump design specification. The
variable speed booster sets are made for the following applications:
Default, pressure regulation (open loop systems)
Level and flow regulation (open loop systems)
Irrigation applications with single or multiple pumps. Improper use
The product must not be used for closed loop systems.
Applications
The application alternatives for the product are the following:
Actuator (constant speed)
The unit operates as an actuator according to speed set point; this is done through user interface, the
corresponding analog input or the communication bus.
Controller (constant pressure)
This mode is set as the default operating mode and is used for a unit in a single pump operation.
Cascade serial / Cascade synchronous
The units are connected via the RS485 interface and communicate via the provided protocol.
The combination of the dierent units which are used in a multi-pump system depends on the system
requirements.
It is possible to run all pumps in cascade serial mode and cascade synchronous mode as well. If one unit fails,
theneach pump of the system can become the lead pump and can take control.
This mode is set as the default operating mode and is used for a booster set unit in a multipump operation.
Cascade serial mode is the standard configuration.
flowboost G.V Pump Manual
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Booster unit technical data
Table 1: Electrical, Environmetal and Installation specifications
Booster model
Control panel supply
(see to idecaon code)
M2 T3 T4
Input
Input frequency [Hz]
50/60 ±2
Main supply LN L1 L2
L3
Nominal input voltage [V]
230 ±
10%
230 ±
10%
400 ±
10%
Max. input current connuous [A] See rang plate on electric panel
Max control panel power [kW] See rang plate on electric panel
Output
Enclosure rate IP 55 - Protect the product from direct sunlight and rainfall
Liquid temperature [°C] / [°F] 0÷80 / 32÷176 (SMB..SVE, SMB..VME)
0÷60 / 32÷140 (SMB..HME..S)
Relave humidity RH releated to
operang temperature [°C] / [°F]
min 5% to max 50% RH @40 / 104
min 5% to max 90% RH @20 / 68
Storage relave humidity 5%÷95% RH
Storage temperature [°C] /[°F] -25÷65 / -13÷149
Operang temperature [°C]
/ [°F]
-20÷50 / -4÷122
Altude [m] / [] Max. 1000 / 3280 above sea level
For installaon over 1000 / 3280 above sea level, de-rang may occur
Sound pressure LpA [dB(A)] <62 @3000 rpm
<66 @3600 rpm
Maximum operang pressure [bar] 8 or 10 or 16, depending on the type of pump
see Installaon, Operaon, and Maintenance Manual of the pump
Minimum sucon pressure According to NPSH curve with a margin of at least 0.5 m for air-free water
Maximum sucon pressure Make sure the inlet pressure plus the closed delivery pressure does
not exceed the maximum operang pressure
Pumps general data See the Installaon, Operaon, and Maintenance Manual of the pumps
Diaphragm pressure tanks [bar] See the Installaon, Use, and Maintenance Instrucons Manual of the tank
If installed, tanks may limit the operang temperature and pressure of the
SMB booster unit
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Dimensions and weights
Design and layout
Booster unit parts and description as standards configuration
Figure 6: Booster unit
Posion
number
Descripon
1. Control Panel
2. Electric pump E (e-SM drive) series
3. Baseplate
4. Priming connecon
5. Damper
6. Sucon manifold
7. Sucon on-o valve
8. Non-return valve
9. Delivery on-o valve
10. Pressure transmier
11. Pressure gauge
12. Tank connecon
13. Delivery manifold
14. Bracket support
flowboost G.V Pump Manual
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Mechanical Installation
Installation site checklist
Never install the unit in an explosive or flammable environment.
Always refer to the local and national regulations, legislation, and codes in force regardingselection of
installation site, and water and power connections.
Keep the manual, drawings, and diagrams accessible for detailed installation and operationinstructions. It is
important that the manual is available for equipment operators.
Ensure that the ingress protection rating of the Unit (IP 55, Type 1) is suitable for theinstallation environment.
Ingress protection. IP55 (type 1) rating can only be guaranteed if the unit is properlyclosed.
Make sure that there is no liquid on the unit before opening the control panel and plasticcover of the frequency
converter unit.
Ensure all cable glands and unused holes for glands are properly sealed.
Make sure that the panel and plastic cover of the frequency converter unit is correctlyclosed.
Device damage through contamination. Do not leave unit without the terminal box cover.
Remove scraps, dirty and solid parts from inside control panel and the frequency converterunit.
Unit installation
Install the unit according to the systems liquid flow.
Usually arrows on the pump housing show flow and rotating direction.
The standard rotating direction for the unit is clockwise (seen from fan cover). For more information contact
Service.
The unit must be installed according to Figure 7.
Always install a backflow-prevention device on the suction side.
Install the unit a well-ventilated room, allowing sucient clearance (0.5 m) on all sides and front for
maintenance. Guarantee 0.5 m in height above the highest part.
Position the set on a level and sturdy surface.
It is recommended to install a closing valve immediately aer the unit.
It is recommended to install a drain valve for testing if no tap has been provided near the unit.
Piping
The pipes that are connected to the set must be adequately sized (if possible, according to manifolddiameter).
You can use either end of the manifold, but do not forget to plug the unused end.
Suction pipe and foot valve must be of sucient size to prevent excessive flow resistance and theconsequent
cavitation phenomena.
To prevent undue stress, expansion joints and suitable pipe supports should be provided (Figure 7). The weight
ofthe pipes and tanks increases when they are filled with water.
Before starting the set, make sure you have closed and tightened all the unused couplings.
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Figure 7: Unit installation
Protection against dry running
The standard electric panel is ready for connection of a common float switch applicable for open tanks or a
minimum pressure switch on the suction side (recommended value 0.2÷0.4 bar). When the minimum pressure
conditions are restored, the pumps start up automatically. If protection against dry running is considered
superfluous, do not remove the jumper on the terminal in electrical panel. The correct terminal numbers are
specified in wiring terminal that is found inside the panels.
Factory seing: the electric pump e-SM drive comes from the factory with the soware protectionenabled.
No dry running control: the booster unit comes from factory with jumper already installed, which disabledthe
control.
With the optional electronic level kit, control by electric probes is possible.
Put the three electric probes that are supplied with the kit inside the storage tank and connect them to the
terminal in the electric panel.
The correct terminal numbers are specified in the wiring diagram inside the panel:
Probe Max (A) determines the unit activation level during the filling of storage tank.
Probe Min (B) determines the unit deactivation level.
Probe (C) must be put at a lower level than that of the boom probe (B).
Outdoor installation
When the unit is installed outdoors a suitable cover must be provided. See Figure 8.
The cover must be sized to ensure that the booster unit is not exposed to snow, rain, or direct sunlight.
Figure 8: Outdoor unit installation
flowboost G.V Pump Manual
13

Electrical Installation
EQUIPMENT HAZARD. Rotating shas and electrical equipment can be hazardous. All electrical work must
conform to national and local electrical codes. Installation, start-up, andmaintenance must be performed by
trained and qualified personnel. Failure to follow theseguidelines could result in death or serious injury.
All electrical wiring must be carried out by an authorized electrician, in accordance with theelectrical
regulations locally in force.
See the wiring diagram that is located inside the control panel for electrical connections.
Electrical requirements
The local regulations in force overrule specified requirements listed below.
Electrical connection checklist
Check that the following requirements are met:
The electrical leads are protected from high temperature, vibrations, and collisions.
The current type and voltage of mains connection must correspond to the specifications on the data plate on
the control panel.
Make sure that the supply cable can handle the rated current of the booster unit, and connect it to the
corresponding terminals in the electric panel. The wiring diagram and the labels on the panel provide the
necessary information for connection and the required power supply values.
Connect the power supply cable:
Single phase version to the L - N terminals, PE to grounding terminal
Three phases version to L1, L2, L3 terminals, PE to grounding terminal.
Cables, when visible, must be suitably protected
The power supply line is provided with:
A high-sensitivity dierential switch (30 mA) [residual current device RCD] suitable for earth fault currentswith
DC or pulsating DC content (a type B RCD is suggested)
A mains isolator switch with a contact gap of at least 3 mm.The electrical control panel checklist
In its standard version, booster unit is shipped with control panel.
When booster unit is sold without control panel, to secure that the control panel must match the ratings of the
electric pump.
Incorrect combinations could fail to guarantee the protection of the unit.
Check that the following requirements are met:
The control panel must protect the pump against short-circuit. A time lag fuse or a circuit breaker (type C
model is suggested) can be used to protect the pump.
The pump has built in overload and thermal protection, no additional overload protection is required.Electrical
Hazard:
Before starting work on the unit, make sure that the unit and the control panel are isolated from the power
supply and cannot be energized.
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Grounding (earthing)
Always connect the external protection conductor to ground (earth) terminal before makingother electrical
connections.
All electrical equipment must be ground (earth) connected. This applies to the pump unit andrelated
equipment. Verify the pump ground terminal is earthed.
Keep the ground wire connections as short as possible.
Use high-strand wire to reduce electrical noise is recommended.
Wire type and ratings
In its standard version, the booster set comes with motor power cables and control cables.
If the motor power cable or control cable, or both, must be replaced or added.
Power supply connection
Do not make any connection in the pump control box unless the power supply has beenswitched o for at
least 4 min.
In its standard version, the booster set comes with motor power cables. If the power cable of the motor must
be replaced or added, fit a new one of a cross-section that issuited to the maximum current consumption of
the electric motor.
Control panel connection
See the wiring diagram inside the control panel.
Operation
In case of co-existance of two or more of the following conditions:
high ambient temperature
high liquid temperature
duty points insisting on unit maximum power
persisting undervoltage of mains, life expectancy of the unit may be aected and/or derating may occur:
contact your Sales and Service Department for more information.
Discharge time
Disconnect and lock out electrical power and wait for the minimum waiting time specified below. Failure to
wait the specified time aer power has been removed before performing service or repair could result in
death or serious injury.
Frequency converters contain DC-link capacitors that can remain charged even when the frequency converter
isnot powered. To avoid electrical hazards, disconnect:
AC mains
Any permanent magnet type motors
Any remote DC-link power supplies, including baery backups, ups and DC-link connections to other
frequency converters.
Wait for the capacitors to discharge completely before performing any service or repair work. Refer to the table
2 for wait times.
flowboost G.V Pump Manual
15

Table 2: Wait times
e-SM Drive model Minimum waing mes
[min]
103, 105, 107, 111, 115 4
303, 305, 307, 311, 315,
322
Start or stop the unit
The starting and stopping of the pumps are determined based on the unit to be controlled (pressure, level)
seings of the controller. Each frequency converter is connected to a sensor. The frequency converters share
allthe information and provide for cyclic changeover.
Disconnect the power supply before making any adjustments.
Figure 9 shows the operating method with the curves for two pumps, pressure regulation mode.
The tank supplies water upon demand by a end-user.
When the pressure drops below the PS value, the first pump is started; the speed is adjusted to maintain a
constant pressure as the demand increases.
When the demand decreases the speed is decreased until minimum speed is reached; at this point one ofthe
pumps is deactivated.
If the demand keeps increasing and the pump reaches maximum speed, the second pump is started and the
speed is adjusted to maintain a constant pressure.
If the demand decreases further the pump slows down, fills the tank and then stops when the PS value is
reached.
Figure 9: Operating method
H Head Pmax Max. pressure
Q Flow PS Pressure seng value
Frequency converter adjustments
Modifying the seings, see Installation, Operation, and Maintenance Manual for Smart Drive Electropumps.
Usethe frequency converter keypanel to set a new pressure adjustment value, select the time ramps, check
the latestalarms, or access all the adjustment seings.
Make sure that the new selected value is in the head range that is specified in the pump rating plate.Tank
precharge
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To ensure its proper operation, the diaphragm pressure tank must be precharged to 0.9 x adjustment pressure
value. The precharge operation must be performed with the tank empty.
Startup
To start the set, proceed as follows:
Connect the water supply.
Connect the power supply.
Check the tank precharge value.
Close the pump delivery valves.
Prime the set (see pump Instructions Manual) and suction manifold.
To supply power and set the converter to manual mode operation, operate the switch on the panel.
Start the first pump.
Slowly open the pump delivery valve and bleed the air.
Repeat the preceding operations for the other pumps.
Set the converters to automatic mode operation.How to modify the seings
Aer the set has been started, proceed as follows to modify the seings within the maximum pressure limits of
the pumps or system, or both:
Determine the required pressure value.
Set the new value on the control panel of one of the converters; the seing is modified automatically on the
other converter also.
Maintenance
Before any service or maintenance disconnect the system from the power supply and wait atleast 4 min
before starting work on or in the unit (the capacitors in the intermediate circuit are discharged by the internal
discharge resistors).
The booster unit does not require any special maintenance.
Check list
Make sure that the cooling fan and the vents are free from dust.
Make sure that the ambient temperature is correct according to the limits of the booster unit.
Make sure that qualified personal perform all modifications of the booster unit.
Make sure that the unit is disconnected from the power supply before any work is carried out. Always consider
the pump and motor Instruction.
The electric panels and frequency converters do not require any maintenance.
Diaphragm pressure tank maintenance: see the Installation, Use, and Maintenance Instructions. Check the
precharge at least once a year.
Check the functions and parameters
If the hydraulic system is changed then follow this procedure:
Make sure that all functions and parameters are correct.
Adjust the functions and parameters if necessary.
flowboost G.V Pump Manual
17

Troubleshooting
The maintenance and repair operations must be performed by qualified personnel.
Before servicing the set, disconnect the power supply and make sure there is no pressure inthe hydraulic
components.
Wait at least 4 min before starting work on or in the unit. The capacitors in the intermediatecircuit are
discharged by the internal discharge resistors.
The frequency converter memorizes the last alarms triggered. Refer to the frequency converter operating
instructions for the types of malfunctions and directions on how to check the last alarms triggered.
Set is o
Cause Soluon
Power supply disconnected Connect power supply
Switch in OFF posion Set switch to ON
Motor does not start
Cause Soluon
Power supply disconnected Connect power supply
Triggering of motor thermal protec-
tor
Eliminate malfuncon and reset the switch
Defecve motor Repair or replace the motor
Frequent startups and stops
Cause Soluon
Defecve tank Repair or replace the tank
Tank Precharge wrongs Set new pressure precharge value in according to pump and set point
Precharge pressure tank is zero The tank must be precharged
The pump speed increases and decreases without stop, and with no water consuption (user closed)
Cause Soluon
Water leaks through the non-return
valve
Check the hydraulic system and check the valve
Tank damaged or undersized Repair or replace the tank
The motor runs but no water is delivered
Cause Soluon
No water on sucon side or inside
pump
1. Fill (prime) the pump or sucon piping
2. Open the on-o valves
Air in sucon piping or pump Bleed the pump, check the sucon connecons
Loss of pressure on sucon side Check the NPSH and, if necessary, modify the system
Check valve blocked Clean the valve
Clogged pipe Clean the pipe
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Pump leaks water
Cause Soluon
Defecve mechanical seal Replace the mechanical seal
Undue mechanical stress on pump Support the pipes
Too noisy
Cause Soluon
Water return when pumps stop Check the non-return valve
Cavitaon Check sucon
Pump rotaon hindered Check for undue mechanical stress on pump
The unit does not generate the desiderate pressure
Cause Soluon
The pumps rotate in wrong direcon Check the correct connecon to the motor by exchanging two leads
On-o valves closed Open the valves
Air in the sucon pipe 1. Eliminate the air
2. Prime the pumps
Excessive sucon li Reduce the sucon li
Excessive ow resistance on sucon
side
Increase the diameter of the pipes
Foot valve damaged Replace the foot valve
Excessive ow resistance in delivery
pipes or valve, or both
Reduce water leaks
Triggering of general system protection (fuses)
Cause Soluon
Short circuit 1. Check the connecon cable
2. Check the motor
Triggering of dierential protection
Cause Soluon
The motor is damaged Replace the motor
The power cable of the motor is
faulty or worn
Replace the cable
The residual circuit breaker is not
compliant to specic
Replace the residual circuit breaker
Residual current to high Contact technicians qualied to modify the electrical installaon
flowboost G.V Pump Manual
19

Pump runs at maximum speed without stops
Cause Soluon
Pressure set point not suitable for
the system (the value is higher than
the pump is able to deliver)
Set new set point in according to pump performance
Sensor is not connected or damaged Check the hydraulic and electrical connecon of sensor
Only one pump is operating
Cause Soluon
Pumps have dierent seng Check frequency converter seng
There is water demand but pump does not start
Cause Soluon
Set point is set to zero 1. Check frequency converter seng
2. Set the set point
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