IV Produkt Envistar Top 04 Operation And Maintenance Manual Download Page 35

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Page 31

Operation and Maintenance

Envistar Top 04-21

DSET.220501.07.en

Continuous product development may give rise to specification changes without notice.

5.7 Cooling Status - reversible heat pump (code TTC)

With control equipment (code MX)

Status information is read on the Climatix display.

Information

Value/example

Explanation

Cooling unit status

UnitOn

Normal status for cooling mode if the
compressor is running depends on the
cooling load.

OFFbyALR

Switched off caused by alarm.

OFFbyDIN

Switched off due to interlock. Climatix
interlocks cooling operation.

OFFbyKey

Switched off due to Carel’s ON/OFF
menu.

HighcondTmp

Compressor speed lowered due to the
high pressure is high.

FrostProtOpr

Compressor speed lowered to protect
the evaporator from freezing. This is
not a fault, but a result of extract air
flow and extract air temperature.

Status HP

Alarms

The heat pump is in alarm mode.

OffbyKey

Switched off due to Carel’s ON/OFF
menu.

Temp ctrl.off

The unit is shut off.

Cooling mode

The heat pump is in cooling mode.

Low outdoor temp The heat pump is blocked as the out-

door temperature is too low.

Low air flow

The heat pump is blocked as the air
flow is too low.

Low return air

temp

The heat pump is blocked as the re-
turn air temperature is too low.

HP Tmp dead

The heat pump does not start due to a
small temperature deviation.

Switch off delay

The heat pump is prevented from
switching off due to a short time since
start.

Switch on delay

The heat pump is prevented from star-
ting due to a short time since stop.

Heating mode

The heat pump is in heating mode.

No need

No need to run the compressor in the
heat pump.

Heating

Heating requirement sent from Clima-
tix to Carel.

Cooling

50%

Cooling load sent from Climatix to
Carel.

Summary of Contents for Envistar Top 04

Page 1: ...Translation of the original instructions Operation and Maintenance Envistar Top Order number Project ...

Page 2: ... TEC R 1V 2V TEC M TTC Home Concept model Unit parts and accessories Rotary heat exchanger TXRR Counter flow exchanger TXMM Air heater water ETAB VV Output var 1 2 3 ThermoGuard ETAB TV Output var 1 2 Air heater electric ETAB EV Output var 1 2 3 Air heater electric ETKB EV Output var 1 2 3 4 Air heater electric ETAB SV Air cooler water ETKB VK Damper ETSP UM ETSP TR ETRL Sound attenuator ETLD Unit...

Page 3: ...enance 7 2 6 Handling of refrigerant 8 2 7 Extended warranty 9 2 8 Spare parts 9 2 9 Dismantling and decommissioning 9 3 Technical description 3 1 Envistar Top air handling unit 10 3 2 Home Concept model 10 3 3 Cooling unit TEC R TEC M 11 3 4 Reversible heat pump ThermoCooler HP code TTC 15 4 Wiring instructions and fuse protection 4 1 MX Complete control equipment 19 Complete electrical connectio...

Page 4: ...code ELEF 35 6 3 Rotary heat exchanger code TXRR 38 6 4 Cleaning 42 6 5 Counter flow exchanger code TXMM 43 6 6 Air heater water code ETAB VV and Thermoguard ETAB TV 46 6 7 Air Heater electric Code ETAB EV ETKB EV ETAB SV 48 6 8 Air cooler water code ETKB VK 50 6 9 Fan unit code ELFF 52 6 10 Damper code ETSP UM ETSP TR ETRL 57 6 11 Sound attenuator code ETLD 59 6 12 Cooling unit code TEC R TEC M a...

Page 5: ...hguard protective mask Fall protection 1 2 Prevent injury to personal and damage to air handling units To avoid injury to persons or damage to air handling units pay attention to the following Read the entire document before working on the unit Comply with national and local laws and regulations for work safety Do not wear loose clothing or jewellery that may get fasten Do not step or climb on the...

Page 6: ... are lost damaged or illegible Contact IV Produkt for replacement stickers specify the item number 1 4 Safety message The following warning symbols and signal words are used in this document to inform of risks WARNING Indicates an imminent or potential dangerous situation which if not avoided can result in death or serious injury BE CAREFUL Indicates a potentially hazardous situation which if not ...

Page 7: ...ch is not designed for starting stopping the unit Always use the service switch in the control equipment to start and shut down the unit Electrical connections WARNING Risk of serious injury Electrical power can cause electric shock burns and death Working on servicing the unit Shut down the unit via the service switch in the control equipment then turn the safety switch to the 0 position and lock...

Page 8: ...WARNING Risk of personal injury Hot surfaces can cause burns Working on servicing the unit Shut down the unit via the service switch in the control equipment then turn the safety switch to the 0 position and lock it There may be several safety switches serving the different parts of the unit All safety switches must be switched off and locked before repairs service Wait at least 30 minutes before ...

Page 9: ...nit via the service switch in the control equipment then turn the safety switch to the 0 position and lock it There may be several safety switches serving the different parts of the unit All safety switches must be switched off and locked before repairs service Wait at least 3 minutes before opening inspection hatches Damper WARNING Risk of personal injury Moving parts can cause crushing injuries ...

Page 10: ...t is not permitted to use the unit in potentially explosive environments Eex 2 2 Manufacturer The Envistar air handling units AHUs are manufactured by IV Produkt AB Sjöuddevägen 7 SE 350 43 VÄXJÖ 2 3 Designations The unit and cooling unit reversible heat pump if selected have a model type plate affixed to the front The model type plate shows the series number and the requisite designations to iden...

Page 11: ...label for air handling units 00018 0409 Cooling unit Order number Code Key Model Name of project Date of manufacture PS Max allowable pressure PT Test pressure TS Temperature range Protection level low Protection level high Refrigerant Fluid group GWP Refrigerant charge Circuit 1 Refrigerant charge Circuit 2 Refrigerant charge Circuit 3 IV Produkt AB VÄXJÖ SWEDEN Contains fluorinated greenhouse ga...

Page 12: ... leak inspection service and repair of the refrigerant circuit are carried out by a certified refrigeration technician Ensure that refrigerant is handled in an environmentally secure manner and in accordance with national regulations The levels for the various actions to be taken for a system are calculated using carbon dioxide equivalents CO2e tonnes This figure is calculated by multiply ing the ...

Page 13: ...4 12 and reversible heat pump code TTC size 06 is not subject to registering or leakage inspection requirements 2 7 Extended warranty In cases in which the equipment delivered is covered by a 5 year warranty in accordance with ABM 07 with appendix ABM V 07 or in accordance with NL 17 with appendix VU20 the IV Produkt Service and Warranty Manual is supplied with the product In order to claim an ext...

Page 14: ...ent sizes and in right hand or left hand versions All units have duct connections in the top up The units are equipped with either a counter flow exchanger code TEM TXM or rotary heat exchanger code TER TXR The units can be supplied with or without integrated control equipment Envistar Top code TEM TXM TER TXR and Envistar Top with integrated Eco Cooler code TEC R TEC M cooling unit or reversible ...

Page 15: ...ling is required the frequency inverter increases the speed of the compressor Compressor protection In the event of an alarm initiated by the frequency inverter or the safety circuit the compressor stops and an alarm indication is given If the unit is equipped with control equipment the alarm can be read on the Climatix display In the event of an alarm correct the fault and then reset the alarm If...

Page 16: ...MK the interlock signal must be sent via a potential free relay The demand signal must be sent via 0 10 V The cooling unit has internal communication between the frequency inverter and the expansion valve s control equipment Communication takes place through the Modbus protocol Circuit board The circuit board in the cooling unit is internally prewired and tested at the fac tory The circuit board c...

Page 17: ...ng system from the evaporator and the com pressor leaves the unit via the condenser in the extract air It is important to ensure that the air volumes are above the specified minimum flow on both the outdoor air and extract air side The process cannot work if these air volumes are not available 00024 15 13 14 10 4 11 2 12 5 6 1 9 7 8 3 Flow chart for refrigerant system size 04 12 1 Compressor 2 Hot...

Page 18: ...11 10 4 1 7 5 6 2 Flow chart for refrigerant system size 16 21 1 Compressor 2 Condenser 3 Extract air fan 4 High pressure switch 5 Measurement outlet high pressure 6 Drying filter 7 Expansion valve 8 Evaporator 9 Supply air fan 10 Measurement outlets low pressure 11 Low pressure control 12 Control unit 13 Suction gas sensor temp after evaporator 14 Pressure sensor low pressure ...

Page 19: ...code TTC Envistar Top with ThermoCooler HP code TTC size 10 Envistar Top with ThermoCooler HP code TTC Size 12 The integrated reversible heat pump ThermoCooler HP code TTC is available as an optional extra to an Envistar Top unit with a rotary heat exchanger The unit has an electronic expansion valve and scroll compressor The units are intended to be used to cool or heat supply air in properties ...

Page 20: ...ng mode becomes an evaporator in heating mode Conversely the evaporator becomes a condenser 00035 8 3 9 11 13 14 10 16 18 19 17 4 1 5 6 2 12 15 7 Flowchart for cooling mode reversible heat pump 1 Compressor 2 Suction gas sensor temp after evaporator 3 Pressure sensor low pressure 4 Expansion valve 5 Frequency inverter 6 4 way valve 7 High pressure switch 8 Pressure sensor high pressure 9 Temperatu...

Page 21: ... the extract air downstream of the heat pump is then recovered in the rotor These two recovery systems give a very high degree of efficiency Since the rotor requires less energy to run than the compressor system this will be in the first instance The compressor will only start when the rotor s energy recovery is insufficient to heat the supply air Compressor Power control takes place with a speed ...

Page 22: ...t notice Heating mode is blocked if the return air temperature does not reach the permit ted minimum temperature The interlock and demand signal is sent via Modbus Circuit board The circuit board for the unit contains Main switch Fuses Control unit The circuit board is installed inside the unit and is internally prewired and tested at the factory ...

Page 23: ...n the unit For further connection to an external process unit we recommend using a multi conductor cable Safety switch A safety switch must be fitted and wired on each power supply Wiring diagrams For wiring diagrams for units with control equipment see the order unique wiring diagram supplied with the unit at docs ivprodukt com Control Diagram Unit functions power supply and fuse protection For r...

Page 24: ... safety switch must be fitted and wired on each power supply 4 3 HS US Without control and without electrical connection Code HS for units without control equipment and without electrical con nection control diagrams are available for the heat exchanger and cooling unit under order unique documentation at docs ivprodukt com for other connection instructions see below Code HS for units without cont...

Page 25: ... fuse refer to Order Unique Documentation at docs ivprodukt com Technical Data 00037 Y G0 1 2 PE L3 L2 L2 L1 L1 3 4 7 8 PE NC NO 1 2 3 4 For unit mounting selectable for counter flow exchanger and rotary heat exchanger For duct mounting selectable for counter flow exchanger 1 Supply 2 Control 1x230V 3 Control 0 10V 4 Alarm closes between 3 4 in case of alarm Rotor operation Code TXRD OJ Electronic...

Page 26: ... the design of the duct system and the settings configuration of the control system e g soft start of fans open damper when the fans are in operation 5 2 Actions in case of standstill According to guidelines for hygienic design VDI 6022 Part 1 In case of prolonged standstill in air treatment systems more than 48 hours it should be ensured that no moist areas can be found downstream of the cooling ...

Page 27: ...amage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit 1 Connect the unit to the power supply via a lockable safety switch 2 Connect the heating cooling coil if relevant 3 Connect the electrical quick connectors between the unit parts in a modular design 4 Installation of the pressure sensor and ...

Page 28: ... alarm OFFbyDIN Switched off due to interlock Climatix interlocks cooling operation OFFbyKey Switched off due to Carel s ON OFF menu High cond temp The compressor s speed is limited due to high pressure Cooling Cooling load sent from Climatix to Carel Frequency inverter output Compr no Compressor number 1 x compressor C1 Compr Sum alarm Alarm management Compressor_C1 Off On Compressor operating mo...

Page 29: ... set J6 Modbus Online No Yes Information about Modbus communication is received Modbus command Stop start Information about command received from Climatix Modbus demand 50 Information about cooling load received from Climatix Status A02 High Press 25 00 bar High pressure Disch temp 50 00 C Hot gas temperature Low press 10 00 bar Low pressure Suct temp 17 00 C Suction gas temperature Status A03 U7 ...

Page 30: ...Hot gas temperature Suction gas temperature Low pressure Evaporating temperature Status A08 Status Off Run Alarm Heat Current 4 3 Arms Compressor s power consumption Voltage 124 Vrms Power to compressor Power 0 92 kW Electrical output used by compressor DC voltage 391 V Internal voltage of the inverter DC ripple 6 V Variation of internal voltage of the inverter Drive temp 40 0 C The inverter s int...

Page 31: ...is a fault with the inverter or compressor In the event of an alarm see Alarm information for inverter and compressor page 64 Safety mode OK VSD restr No The inverter restricts the speed Cooling 50 Cooling load from Climatix cooling regulator Compr frequency 60 Hz Frequency to the compressor Hot gas temp 75 C Hot gas temperature Danfoss VSD EEV Electronic Expansion Valve Suction gas temp 17 C Meas...

Page 32: ...High pressure relative Discharge 75 C Hot gas Status A03 Inverter temp 60 C Internal temp of the inverter Voltage supply 230 V Supply voltage to inverter 1 phase Voltage DClink 390 V Internal DC voltage of the inverter Compressor power 2200 W Electrical power use Compressor current 10 0 10 0 10 0 A Compressor current Status A05 NO1 Compressor O Relay status of operating indication NO2 Global alarm...

Page 33: ...FFbyALR Switched off caused by alarm OFFbyDIN Switched off due to interlock Climatix interlocks cooling operation OFFbyKey Switched off due to Carel s ON OFF menu High cond temp The compressor s speed is limited due to high pressure Cooling 50 Cooling load sent from Climatix to Carel Frequency inverter output 60 Compr no Compressor number 1 x compressor C1 Compr Sum alarm Alarm management Compress...

Page 34: ...tus A03 ID1 Comp 1 amarm O Alarm IN for high pressure switch and frequency inverter B6 Remote on off O Interlocking of ventilation control Status A04 EVD 1 DI 1 O IN expansion control EVD EVD 1 DI 2 O IN expansion control EVD Status A05 NO1 Compressor 1 O OUT for compressor 1 NO2 Global alarm C Alarm OUT for ventilation control NO3 4way valve C Not used Status A06 Y2 Comp inverter 0 OUT signal 0 1...

Page 35: ...s not a fault but a result of extract air flow and extract air temperature Status HP Alarms The heat pump is in alarm mode OffbyKey Switched off due to Carel s ON OFF menu Temp ctrl off The unit is shut off Cooling mode The heat pump is in cooling mode Low outdoor temp The heat pump is blocked as the out door temperature is too low Low air flow The heat pump is blocked as the air flow is too low L...

Page 36: ...n Off Compressor operating mode Suction gas temp C1 17 C Measured suction gas temp Evaporation temp C1 10 C Calculated evaporation temp based on low pressure Low pressure C1 10 bar Relative pressure from low pressure sensor Overheating C1 7 K Measured overheating High pressure C1 25 bar Relative pressure from high pressure sensor Expansion valve_1 80 Expansion valve position Condensation temp C 42...

Page 37: ...al inspection Check press balance Check diff pressure Control rotor speed Clean if necessary 38 signature signature signature signature Counter flow exchanger size 04 12 TXMM Visual inspection Clean if necessary Check function 43 signature signature signature signature H O 2 Air heater water ETAB VV ETAB TV Visual inspection Clean if necessary Check function 46 signature signature signature signat...

Page 38: ...f necessary Check function Check for leakage and report if necessary 60 signature signature signature signature More frequent servicing may be required in certain environments Reversible heat pump code TTC Service year 20 Order no Project Comments Service performed date and signature Functional section Code Recommended action insp Page ref 12 mths 24 mths 36 mths 48 mths DX DX Cooling heating pump...

Page 39: ...The filters are designed for one time use If they become fouled the unit will lose capacity The filters should therefore be changed if the pressure drop across them exceeds the specified final pressure drop It is important to stop the unit before changing filters to prevent dust from coming loose and being drawn into the unit The inside surfaces of the filter sections should therefore also be clea...

Page 40: ...ir flow retain the filter replacement interval of 12 months for lower air flows To change the value refer separate Climatix control documentation Inspection WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit 00033 xx Pa xx Pa Check the pressure ...

Page 41: ... or inspecting the air handling unit 1 Shut down the unit via the service switch in the control equipment safety switch in the 0 position 2 Wait until the fans have stopped then open the inspection door 3 Release the eccentric rails 4 Remove the old filter by pulling it towards you Discarded filters should be disposed of correctly The carbon filters are combustible in their entirety 5 Clean the fi...

Page 42: ... energy recovery It is not usual for the rotor passages to become fouled with dust since the rotor is normally self cleaning However this might occur if the dust is of a sticky na ture A reduction of the extract air flow e g due to fouling of the extract air filter en tails reduced heat recovery efficiency Units in the Home Concept design are equipped with a function to control the pressure balanc...

Page 43: ...elt is intact and clean 7 Check that the rotor s inlet surfaces are not covered with dust or other impurities NB Avoid touching the rotor inlet and outlet surfaces with your hands or tools 8 Check the pressure balance For design Home Concept the trim damper ETSP UM TR regulates the pressure balance automatically against the set value in the controller unit Check that the measured pressure balance ...

Page 44: ...rect pressure balance Example Measurement outlets for P2 Downstream supply air fan SF generates negative pressure in relation to the atmospheric pressure atm e g 100 Pa Measurement outlets for P3 Downstream extract air fan EF and any trim damper generate greater negative pressure than at P2 e g 125 Pa 00015 25 Pa P3 P2 100 Pa 125 Pa P1 P4 P 1 atm 101 kPa 1 Measurement outlets for pressure balance ...

Page 45: ...stment should be carried out as follows Measure and write down the differential pressure between the outdoor air P1 and the extract air P3 00014 P2 P1 P4 P3 xx Pa 1 2 1 Purging sector 2 Pa see table below Read the recommended setting adjustment hole in the purging sector from the table below Rotor variant Adjustment hole in the purging sector 3 open 2 intermediate position 1 closed Diff pressure b...

Page 46: ...prayed with a mild alkaline detergent Compressed air at low pressure max 6 bar can be used for blowing the surfaces clean To avoid damage the nozzle should not be held any closer to the rotor than 5 10 mm A hygroscopic rotor variant can absorb particles which in some cases give off odours In case of odour problems it is recommended to fully open purging sector and rotor speed 8 rpm in normal opera...

Page 47: ...he by pass damper is not closing completely A reduction of the extract air flow e g due to fouling of the extract air filter entails reduced heat recovery efficiency Inspection WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit 1 Shut down the u...

Page 48: ... through the counter flow exchanger The main risk for fouling of the counter flow exchanger comes from slow moving substances that condense on the surfaces and also from fibres from tumble dryers for instance The recommended way to clean the counter flow exchanger is by flushing with hot water if necessary adding some mild detergent The counter flow exchanger is equipped with a drip tray that is u...

Page 49: ...heat recovery and when the unit is switched off the dampers should be fully open bypass damper closed When there is a risk of frost the dampers can be in different positions The defrost and bypass function is preset at the factory and any adjustments must be performed by IV Produkt Functional description frosting function BYP code TXMM NP Under certain operating conditions frost and ice may build ...

Page 50: ...ts full capacity the coil must be well vented The pipework should be vented by opening the bleeder screws in pipe connections and or an air vessel Inspection WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit Check 1 The coil fins to detect poss...

Page 51: ...ith a safety valve the function of which should be checked regularly at least once a year If you see that the valve is leaking this is normally due to impurities from the pipe system that have accumulated on the valve seat In normal cases it is sufficient to ca refully turn the valve knob and in this way flush the valve seat clean If the safety valve continues to leak you will have to replace it w...

Page 52: ...or duct mounting 00027 Air heater electric ETAB EV ETAB SV 00026 Air heater electric size 04 12 ETKB EV The electric heater consists of encapsulated stainless steel smooth pipe ele ments Heavy soiling on the heating elements may cause the temperature to get too hot This can shorten their service life This might also entail an odour of burnt dust and in the worse case the risk of fire Overheated el...

Page 53: ...ng or inspecting the air handling unit 1 Simulate reduced required output by temporarily lowering the temperature setting setpoint so that all the electric output steps contactors switch out 2 Then sharply increase the setpoint setting and check that the electric output steps switch in 3 Restore the temperature setting 4 Stop the unit NB Do not stop operation with the safety switch All the elec tr...

Page 54: ...uality filters as time passes dust deposits will form on the front edges of the coil fins at the inlet side A drip tray with drain is located under the cooling coil for collecting and removing eva poration water Inspection WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or insp...

Page 55: ... cleaning under Documentation at ivprodukt docfactory com Venting WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit Vent the cooling coil and the pipe connections if needed Bleeder screws are on top of the coil or on the tube connections Functi...

Page 56: ... generate a lo wer air flow this will impair the function of the ventilation system If the supply air flow is too low the system will be out of balance causing poor room climate If the extract air flow is too low the ventilation capacity will be unsatisfactory Imbalance may also force moist air out into the building structure One rea son why the fans are generating too little air flow may be that ...

Page 57: ...elopment may give rise to specification changes without notice Inspection 00021 1 3 4 5 6 7 8 2 9 Example fan unit size 04 06 1 Screws suspension 2 Connection plate 3 Inlet cone 4 Vibration damper 5 Anti vibration support 6 Fan impeller with motor 7 Edge cover 8 Earth braid 9 Mounting plate fan ...

Page 58: ...ti vibration supports 5 both upper and lower For size 09 21 Loosen the screws 1 and the pins 2 Remove the side cover 6 Pull out the fan units fan and motor are mounted on slide rails 2 Check that the fan impeller rotates easily is in balance and does not vibrate Also check that the fan impeller is clean from any accumulation of particles Imbalance may be due to a coating or damage to the fan impel...

Page 59: ... intact and is firmly fitted 9 Check that the measurement tubes are securely fitted on each measurement outlet 10 Remount the fan units 11 Check that the earth braid is attached to both ends 12 Check the air flows by reading the flow display on the Climatix display unit for units with control equipment code MX measuring Δp in the connections measurement outlets for flow measurement for units witho...

Page 60: ... the fan impeller blades to remove any coatings Use a mild alkaline detergent 3 The external surfaces of the motor must be kept clean from dust dirt and oil Clean with a dry cloth In the event of stubborn dirt use a mild alkaline detergent The motor is likely to overheat inside if thick layers of dirt prevent air from entering the motor to cool the stator structure 4 Vacuum clean the air handling ...

Page 61: ... use If the outdoor air damper does not close completely when the unit stops the air heating coil is likely to freeze If the trim damper for the rotor purging function is not working or is incorrectly set it may result in odours from the extract air being transferred to the supply air via the rotor Inspection WARNING Risk of serious personal injury and or damage to air handling unit Read and under...

Page 62: ...changes without notice Cleaning WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit Clean the damper blades with a cloth In the event of stubborn dirt use a mild alkaline detergent ...

Page 63: ...ry and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the air handling unit Check that the baffle elements are intact and have clean surfaces Take action if necessary Cleaning WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safet...

Page 64: ...g the air handling unit Check 1 fins on the supply air coil extract air coil for mechanical damage 2 The drip tray and drain with water trap clean if necessary 3 that the water trap is filled with water Cleaning WARNING Risk of serious personal injury and or damage to air handling unit Read and understand the entire chapter 1 5 General safety messages before working on servicing or inspecting the ...

Page 65: ...s the condenser Check the air flow across the condenser Reset the pressure switch manually Defective high pressure switch Check replace NO Is Carel alarm LOP displayed YES Insufficient refrigerant volume Look for leakage seal the leak and top up with refrigerant No or too low air flow across evaporator Check adjust the flow Defective expansion valve or low pressure control Check replace NO Is Care...

Page 66: ...k the control safety switches and fuses Compressor has opened a safety circuit Check and reset if needed The control unit is switched off Start the control unit Compressor defect Check replace Frost on the evaporator The expansion valve is incorrectly preset defective Check replace Insufficient refrigerant volume Look for leakage seal the leak and top up with refrigerant Low supply air flow Adjust...

Page 67: ... expansion valve or low pressure control Check replace The LED is off or flashing green on the frequency inverter see also information below Phase failure voltage failure Check the 1 phase supply measure the incoming voltage Check the high pressure switch by pressing the button Reset the frequency inverter by switching off the voltage for 1 minute or more Check that the compressor is running witho...

Page 68: ...rm reset High inverter temp AL H03 Compressor Drive DRIVE_TEMPERATURE_HIGH A too high temperature in the inverter has been re gistered 115 C and the inverter stopped The alarm may be caused by e g a defective coo ling fan blocked air flow or abnormally high ambient temperature The alarm needs to be reset Low supply voltage AL H04 Compressor Drive SUPPLY_VOLTAGE_LOW A too low supply voltage has bee...

Page 69: ...m reset Too many starts AL D15 Compressor Drive RESTART_TOO_FREQUENTLY The compressor has been restarted too many times in a 10 minute period and the inverter stopped The alarm needs to be reset Check that the air flow is correct Set the start delay for the compressor to 3 minutes after the compressor is turned off For UC MK US Check that the regulator that starts stops cooling mode is not too fas...

Page 70: ...is displayed Since the inverter loses all power when the high pressure switch is tripped a communication error alarm is also displayed Com Modbus alarm Danfoss Alarm Alarm reset Manually reset alarms caused by a tripped high pressure switch by pressing the red button on the pressure switch Reset alarms from the inverter or the compressor by turning off the power to the unit inverter for at least 1...

Page 71: ...nt No or too low air flow across evaporator Check adjust the flow Defective expansion valve Check replace NO Is the LED flashing red on the frequency inverter YES Phase failure voltage failure Check the 3 phase supply measure the incoming voltage Reset the frequency inverter by switching off the voltage for 1 minute or more Check that the compressor is running without dissonance Overload defective...

Page 72: ...ions on the Carel unit wiring and sensors Alarm C1 low overheating Compressor stoppage caused by low overheating Alarm C1 LOP Compressor stoppage caused by low evaporation temperature Alarm C1 MOP Compressor stoppage caused by high evaporation temperature Alarm C1 communication EVD Fault on communication to EVD expansion valve control Alarm C1 low suction gas temp Low suction gas temperature Alarm...

Page 73: ...d fuses Incorrect phase sequence compressor 2 Switch two of the incoming phases Compressor has opened a safety circuit Check and reset if needed Defective compressor Check replace Frost on the evaporator heating application Expansion valve is defective Check replace Insufficient refrigerant volume Look for leakage seal the leak and top up with refrigerant Low return air flow Adjust the flow Alarm ...

Page 74: ...7 075 88 00 Control support 46 0 47 075 89 00 styr ivprodukt se Service 46 0 47 075 89 99 service ivprodukt se Spare parts 46 0 47 075 88 00 spareparts ivprodukt com Visit us at www ivprodukt com Documentation for your unit docs ivprodukt com Technical documentation DU ivprodukt se ...

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