FläktGroup EU ECONET Fault and error Installation guide

Brand: FläktGroup

Model: EU ECONET Fault and error

Type: Installation guide

FläktGroup EU ECONET Fault and error manual provides comprehensive guidance for troubleshooting common issues and alarms encountered with the ECONET system. It includes detailed analysis and resolution steps for issues such as ice and frost alarms, pump and pressure alarms, temperature sensor malfunctions, efficiency concerns, and continuous pump operation. The manual also outlines the basic data required for troubleshooting, including sensor values for air and liquid temperatures, flow rates, and pressure.

ECONET ® Fault and error manual

March 2009

Fläkt Woods 8419 GB 2009.03 2 Specifications are subject of alteration without further notice.

ECONET® MANUAL

ECONET® Fault and error manual

Contents

Basic data to get started ....................................................................3

A Alarms

1. Ice alarm, GT 42 .................................................................4

2. Frost alarm, GT 41 .............................................................4

3. Pump alarm, P 40 .............................................................. 5

4. Pressure alarm, GP 40 .......................................................5

5. Liquid, temperature sensor alarm, GT 41, 42 .................5

B Alarms

6. Air temperature sensor alarms, GT 00, 10, 20, 21...........5

7. Pump 1 or pump 2 alarm, P 40.1 or P 40.2 .......................6

8. Efficiency alarm ................................................................6

Other issues

9. Low heat recovery efficiency ...........................................6

10. Pump continuous on 100%, P 40 .....................................7

ECONET commissioning protocol .................................................8

Fläkt Woods 8419 GB 2009.03 3 Specifications are subject of alteration without further notice.

ECONET® MANUAL

Basic data to get started

ECONET® Fault and error manual

First, check following datas:

Sensor Value Function Where to get the information

Air temperatures

GT 00: ºC Out door air, Thermometer AHU/ECONET controls

GT 10: ºC Supply air Thermometer AHU/ECONET controls

GT 20: ºC Exhaust air Thermometer AHU/ECONET controls

GT 21: ºC Extract air Thermometer AHU/ECONET controls

Liquid temperatures

GT 40: ºC Supply coil in Thermometer or ECONET controls

GT 41: ºC Supply coil out Thermometer or ECONET controls

GT 42: ºC Exhaust coil out Thermometer or ECONET controls

GT 30: ºC Primary heating in Thermometer or AHU controls

GT 50: ºC Primary cooling in Thermometer or AHU controls

Flows

GF 10: m³/s Supply air Flow indicator, AHU/ECONET controls

FO 10: Hz Supply air Frequency inverter

GF 20: m³/s Exhaust air Flow indicator, AHU/ECONET controls

FO 20: Hz, Exhaust air Frequency inverter

GP 41: l/s Liquid flow ECONET controls

FO 40: Hz Liquid flow Frequency inverter

Others

H.rec. signal V Heat recovery signal AHU/ECONETcontrols

SV 40: % By pass valve, postion ECONET controls

Fläkt Woods 8419 GB 2009.03 4 Specifications are subject of alteration without further notice.

ECONET® MANUAL

A ALARMS

1. Ice alarm, GT 42

1.a. What ?

Low liquid temperature (GT 42) after the exhaust air

coil. Risk of destroying the heat / cooling exchangers,

set value for temperature alarm, standard +2 °C.

1.b. Analysis

SV 40: BY PASS VALVE

• SV40closed,Heatrecoverysignal100%(10V)

– ok

• SV40open

– error in valve or cabling

– heat recovery signal 0 - 30%

– cooling sequence

– manual position of valve, shall be in automatic

position.

GF 10, 20: AIR FLOW

• Exhaustair,GF20<<supplyair,GF10

• Exhaustair,GF20<<ofdimensioned.

EXHAUST AIR COIL

• Frostformationontheexhaustaircoil.

GT 20: EXHAUST AIR TEMPERATURE

• Exhaustairtemperature,GT20<<ofdimensioned.

GP 41: LIQUID FLOW

• Liquidflow>1/3ofsupplyairflow?

– ok

• Otherwise,ECONETdoesnotincreasetheliquidflow

due to the risk of ice formation

– check the parameters

– check the frequency inverter, shall be in auto-

matic position.

WHEN AT STATE NOT RUNNING

• When continuous Ice alarm the supplementary

heating valve has to open during ‘state not running’,

setvalueforopeningSV30(heatingvalve)forexample

GT 42 = +10 °C, look at ECONET functional descrip-

tion.

WHEN AT STATE START UP

• StartsequenseforAHU,firststartECONETandexhaust

air unit, after some minutes start supply air unit.

OTHER ALARMS

• HastherebeenanotheralarmbeforeIcealarm?

A ALARMS

2. Frost alarm, GT 41

2.a. What ?

Low liquid temperature (GT 41) after the supply air coil.

Risk of frost formation in the exhaust air coil, set value

for temperature alarm, standard -10 °C.

2.b. Analysis

GT 10: SUPPLY AIR TEMPERATURE

• Setvalue=actualvalueGT10

– ok

• Setvalue>actualvalueGT10andSV30inposition

100%

– reduced supplementary heating power

  –toolowheatingtemperatureatSV30

– recovered heat from the exhaust air too low

GP 41: LIQUID FLOW

• Liquidflow>1/3ofsupplyairflow?

– ok

• GT40>GT10+6°C

– ECONET does not increase the liquid flow due

to the risk of frost formation

– check the parameters

GT 00 OUT DOOR AIR TEMPERATURE

• Outdoorair,GT00lowerthandimensioningcircum-

stances.

WHEN AT STATE START UP

• StartsequenseforAHU,firststartECONETand

exhaust air unit, after some minutes start supply air

unit.

• No or too slow availability of supplementary

heating.

OTHER ALARM

• HastherebeenanotheralarmbeforeFrostAlarm?

ECONET® Fault and error manual

Fläkt Woods 8419 GB 2009.03 5 Specifications are subject of alteration without further notice.

ECONET® MANUAL

A ALARMS

3. Pump alarm, P 40

3.a. What ?

The pump does not run, when it should.

3.b. Analysis

POWER FAILURE (ELECTRICITY)

• Check.

P 40: NO SIGNAL FROM PUMP

• Checkcable.

FO 40: FREQUENCY INVERTER FOR PUMP

• Inverterhastobeonautomatic.

OVERVOLTAGE

• Ifthereisanalarmwhenfrequencyon50Hz,it

might be over voltage

• Whyrunningon50Hz?

• AdjustmaxHzto45Hzorlower.

OTHER ALARM

• Has there been another alarm before the Pump

alarm?

A ALARMS

4. Pressure Alarm, GP 40

4.a. What ?

Low static pressure on suction side of pump (P 40) Risk

ofdestroyingcomponentsintheliquidcircuit.Setvalue

for alarm, standard 0,5 bar.

4.b. Analysis

LEACKAGE IN LIQUID CIRCUIT

• Fixit.

AIR IN THE LIQUID CIRCUIT

• Purgetheair

• Checktheairpurgingequipment

• Addliquid.

COMPONET FAILURE, GP 40

• Checkthecomponent.

OTHER ALARM

• HastherebeenanotheralarmbeforethePressure

Alarm?

A ALARMS

5. Liquid, temperature sensor alarm , GT 41, 42

5.a What ?

Component alarm, liquid temperatures, frost protection

temperature (GT 41) or Ice protection temperature (GT

42).

5.b. Analysis

CHECK CABLING

CHECK SENSORS

B ALARMS

6. Air temperature sensor alarm, GT 00, 10, 20, 21 and

liquid temperature sensor alarm, GT 40

6.a What ?

Component alarm, liquid temperature at Pump (GT 40).

Air temperature sensors for deliveries with temperature

efficiency calculation.

Component alarm, air temperatures, outdoor air tempe-

rature (GT 00) supply air temperature (GT 10) exhaust

air temperature (GT 20) or extract air temperature

(GT 21).

6.b. Analysis

CHECK CABLING

CHECK SENSORS

7. Pump 1 or Pump 2 alarm, P 40.1 or P 40.2

7.a What ?

Only for deliveries with twin pump solution

Component alarm, either one of the pumps or one of the

frequency inverters (for the pumps).

7.b. Analysis

CHECK PUMP AND FREQUENCY INVERTER

• replacethebrokencomponent

ECONET® Fault and error manual

Fläkt Woods 8419 GB 2009.03 6 Specifications are subject of alteration without further notice.

ECONET® MANUAL

8. Efficiency alarm

8.a What ?

Only for deliveries with temperature efficiency

cal culation.

8.b. Analysis

CHECK CABLING

CHECK SENSORS

OTHER ISSUES

9 Low heat recovery efficiency

9.a What ?

Lower energy recovery efficiency than expected:

The temperature heat recovery efficiency is calculated as:

h = (GT 42-GT 41) x (GT 10-GT 00)

(GT 40-GT 41) x (GT 20-GT 00)

Whentheheating

valveSV30 is open

h = (GT 10-GT 00)

(GT 20-GT 00)

Whentheheatingvalve

SV30isclosed

h = (GT 21-GT 20)

(GT 00-GT 20)

Whencoolingrecoveryis

calculated

9.b Analysis

HEAT RECOVERY SIGNAL

• 100%(10V)

– ok

• <100%(<10V)

– no need of maximum heat recovery.

GF 10, 20: AIR FLOW

• supplyairflow=exhaustairflow

– ok

• supplyairflow>exhaustairflow

– lower efficiency

• supplyairflow<exhaustairflow

– higher efficiency

GT 00: OUT DOOR AIR TEMPERATURE

• -10°C<GT00<0°

– ok

• GT00<-10°C

– reduced heat recovery due to frost formation

mode.

GT 21: EXTRACT AIR TEMPERATURE

• GT21<GT41+6°

– ok

• GT21~GT00

– Exhaust air flow lower than the supply air flow

• GT21~GT20

  –SV40open

– Exhaust air flow bigger than the supply air

flow.

GT 20: EXHAUST AIR TEMPERATURE

• checkthattheexhaustairtemperature/humidityis

similar to dimensioned exhaust air temperatur

• lowerexhaustairtemperature

– lower efficiency

• lowerexhaustairhumidity

– lower efficiency

• higherexhaustairtemperature

– higher efficiency

• higherexhaustairhumidity

– higher efficiency.

GT 10: SUPPLY AIR TEMPERATURE

• checkthatthesupplyairtemperatureissimilarto

dimensioned.

GP 41: LIQUID FLOW

• shallbe1/3 of the air flow l/s vs. m3 /s

– ok

• <1/3 of the supply air flow

–reducedheatrecovery(Heatrec.signal<100%)

– ECONET gets wrong air flow

– parameter fault

• >1/3 of the supply air flow

– ice /frost formation mode

– ECONET gets wrong air flow

– parameter fault

GT 40: LIQUID TEMPERATURE, SUPPLY COIL IN

• GT40~GT10+6°C

– ok

• GT40~GT41

– high liquid flow

– low supply air flow

• GT40>GT10

– low liquid flow.

ECONET® Fault and error manual

Fläkt Woods 8419 GB 2009.03 7 Specifications are subject of alteration without further notice.

ECONET® MANUAL

GT 41: LIQUID TEMPERATURE, SUPPLY COIL

OUT

• GT41~GT00+6°C

– ok

• GT41~GT40

– high liquid flow

– low air flow

• GT41~GT00

– low liquid flow

– low supply air flow

• GT41<-3°C

– frost formation mode with high liquid flow

– ok.

GT 42: LIQUID TEMPERATURE, EXHAUST COIL

OUT

• GT42~GT20-4…6°C

– ok

• GT42~GT41

– high liquid flow

– little/no exhaust air flow

  –SV40open.

SV 40: BY-PASS VALVE

• SV40closed,whenheatrecoverysignal>30%

– ok

• SV40open

– valve or cable fault

– cooling sequence

– manual / automatic position, shall be on auto-

matic.

10. Pump continuous on 100%, P 40

10.a. What ?

ECONET® controls the liquid flow according to the

need and the circumstances.

Normally the pump runs on 30-60% of maximum when

there is a need of maximum heat recovery, heat recovery

signal=100%(10V).

10.b. Analysis

GT 41: RISK OF FROST FORMATION

• GT41<-3°C

– ok.

G T 42: RISK OF ICE FORMATION

• GT42<+6°C

– ok.

INDATA/PARAMETER LIST

• compare data foundinthe controlstothe para-

meterlist.

GF 10: CHECK THE SUPPLY AIR SIGNAL

• checktypeofsignalflow/pressurelinearsignal,

sensor/ECONET controls

• checkk-factor,labelonAHU/ECONETcontrols

• checkwiring,forsupplyairGF10seebelow

• checkthetubes.

GP 41: PRESSURE SENSOR (Huba)

• isthesensorconnectedinaproperway?

• aretheshutoffvalvesintherightposition?

• setvalue=actualvalue.

SHUT OFF VALVES

• theshutoffvalvesshallbeopen(excepttheshutoff

valve between the supplementary energy in/out,

position depends on the connection)

• MMAvalveshallalwaysbe100%open.

P 40: PUMP ROTATION

• Pumprunningintherightdirection?

• Comparewitharrowsfoundonthepump

• Checkthepressureonthepressuresideofthepump

(4-6 bar).

ECONET® Fault and error manual

Air flow sen-

sor,

exhaust air

GF10

OUT

Air flow sensor,

supply air

GF20

–X1

Fläkt Woods 8419 GB 2009.03 8 Specifications are subject of alteration without further notice.

ECONET® MANUAL

Liquid coupled heat exchanger EURT/STRZ-74

ECONET commissioning

Project name

AHU label

Order number

Date of start up

Signed by

Piping Ok Comments

Mounting of pump unit

Dip tray for pump

Coils, connection

Coils, drainage

Air eliminator (automatic combined with a manual eliminator)

Micro bubble eliminator

Expansion vessel on suction side of oump P40

Anti-freeze liquid Ok Comments

System filled up

Air eliminated

Static pressure in the system(> 1 bar)

Opening pressure for expansion vessel (> 4 bar)

Used anti freeze liquid for dimensioning

Actual anti freeze liquid

Supplementary heating Ok Comments

Heat exhanger

Heating energy connected

Cooling exhanger

Cooling energy connected

Shut off valve, closed (closed circuit)

Shut off valve, opened (opened circuit)

Automation/electriffication made on site Ok Comments

Cabling of controls between ECONET and AHU c.box

Electricity to ECONET control

Electricity to ECONET frequency converter

Fläkt Woods 8419 GB 2009.03 9 Specifications are subject of alteration without further notice.

ECONET® MANUAL

Liquid coupled heat exchanger EURT/STRZ-74

ECONET commissioning

Supply air flow Ok Comments

Components mounted and wired to the ECONET control box

k-coeff label vs parameterlist

Flow or pressure linear

Scale, as in the parameterlist

Check miniature switches

Calibration of the transmitter

Check the air tubes

ECONET controls Ok Comments

Data for project found in the control unit

Instruction for control box

Control box programmed with actual data

Frequency converter programmed with actual data

Calibration of the manometer to 0,5 bar

Pump motor direction

Check the wiring in the control box

Other wiring/components

LON card mounted and programmed

Controls AHU/ECONET Ok Comments

Start signal

Heat recovery sequence

Funtion of supplementary heating valve

Cooling sequence

Cooling recovery sequence

Funtion of supplementary cooling valve

A-alarms

SV 40 closed/open

Supply air flow to ECONET control box

Optional Ext. delivery, efficiency and energy calculation Ok Comments

GF 20 mounted and wired to the ECONET control box

k-coeff label vs parameterlist

Flow or pressure linear

Scale, as in the parameterlist

Check miniature swiches

Calibration of the transmitter

Check the air tubes

GT 00 mounted and wired to the ECONET control box

GT 10 mounted and wired to the ECONET control box

GT 20 mounted and wired to the ECONET control box

GT 21 mounted and wired to the ECONET control box

FWG_ECONET Fault and error manual_2009.03_SE_8419 Condesign Info Productions AB ABF5503

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ing/engineering operations worldwide, sales offices in 30 countries and

representation in 95 countries.

Sales Offices available World Wide –

See our website for details.

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Due to a policy of continuous development and improvement the

right is reserved to supply products which may differ from those illus-

trated and described in this publication. Certified dimensions will be

supplied on request on receipt of order.

FläktGroup EU ECONET Fault and error Installation guide

FläktGroup EU ECONET Fault and error Installation guide

FläktGroup EU ECONET Fault and error Installation guide

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