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FläktGroup EU ECONET Fault and error Installation guide

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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
• Ifthereisanalarmwhenfrequencyon50Hz,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
G
GO
OUT
Air flow sensor,
supply air
GF20
–X1
51
52
53
54
55
56
57
58
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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representation in 95 countries.
Sales Offices available World Wide –
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trated and described in this publication. Certified dimensions will be
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