REMKO ML 263 DC Assembly And Operating Instructions Manual
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REMKO ML 263 DC Assembly And Operating Instructions Manual

Inverter wall-mounted room air conditioner with split design
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Assembly and operating instructions
REMKO ML...DC
ML 263 DC, ML 353 DC, ML 523 DC
Inverter wall-mounted room air conditioner with split design
Read the instructions prior to performing any task!
0049-2015-07 Edition 4, en_GB

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Summary of Contents for REMKO ML 263 DC

  • Page 1 Assembly and operating instructions REMKO ML...DC ML 263 DC, ML 353 DC, ML 523 DC Inverter wall-mounted room air conditioner with split design Read the instructions prior to performing any task! 0049-2015-07 Edition 4, en_GB...
  • Page 2 Read these operating instructions carefully before commis- sioning / using this device! These instructions are an integral part of the system and must always be kept near or on the device. Subject to modifications; No liability accepted for errors or mis- prints! Installation and operating instructions (translation of the orig- inal)

  • Page 3: Table Of Contents

    Table of contents Safety and usage instructions......................5 1.1 General safety notes........................5 1.2 Identification of notes........................5 1.3 Personnel qualifications........................5 1.4 Dangers of failure to observe the safety notes................5 1.5 Safety-conscious working....................... 5 1.6 Safety notes for the operator......................6 1.7 Safety notes for installation, maintenance and inspection..............
  • Page 4 REMKO ML...DC 11.2 Indoor unit fault analysis......................47 Care and maintenance........................53 Shutdown............................. 55 Exploded view and spare parts lists....................56 14.1 Exploded view - Indoor unit......................56 14.2 Spare parts list - Indoor unit......................57 14.3 Exploded view - Outdoor unit...................... 58 14.4 Spare parts list - Outdoor unit.....................

  • Page 5: Safety And Usage Instructions

    Safety and usage instructions CAUTION! This combination of symbol and signal word 1.1 General safety notes warns of a potentially hazardous situation, which if not avoided may cause injury or mate- Carefully read the operating manual before com- rial and environmental damage. missioning the units for the first time.

  • Page 6: Safety Notes For The Operator

    "certificate of warranty" to conditions stipulated in this manual and comply REMKO GmbH & Co. KG at the time when the with all applicable regional regulations. units are purchased and commissioned.

  • Page 7: Transport And Packaging

    1.11 Transport and packaging The devices are supplied in a sturdy shipping con- tainer. Please check the equipment immediately upon delivery and note any damage or missing parts on the delivery and inform the shipper and your contractual partner. For later complaints can not be guaranteed.

  • Page 8: Technical Data

    9.00 10.50 11.50 EDP no. 1633263 1633353 1633523 Data specific to indoor unit ML 263 DC IT ML 353 DC IT ML 523 DC IT From serial number: 1305... 1307... 1309... Application area (room vol.), approx. Adjustment range, room temperature °C...
  • Page 9 Data specific to outdoor unit ML 263 DC AT ML 353 DC AT ML 523 DC AT V/Ph/ Power supply 230 / 1~ / 50 Operating range, cooling °C +5 to +50 Operating range, heating °C +5 to +30 Air flow rate, max.

  • Page 10: Unit Dimensions

    REMKO ML...DC 2.2 Unit dimensions Outdoor units Fig. 1: Outdoor unit dimensions ML 263 DC AT-523 DC AT (All measurements in mm) Dimensions (mm) ML 263 DC AT-353 DC AT ML 523 DC AT Indoor units Fig. 2: Indoor unit dimensions ML 263 DC IT-523 DC IT (All measurements in mm)

  • Page 11: Performance Curves For Heating And Cooling

    4,00 3,00 2,00 1,00 0,00 [°C] Fig. 3: Performance curves, heating ML 263 DC (data for 20 °C indoor temperature) A: Outside temperature 2: Heating capacity in kW 1: COP 3: Power consumption in kW Outside temp. in °C Heating capacity in kW 3.01...
  • Page 12 REMKO ML...DC Heating capacity ML 353 DC 5,00 4,00 3,00 2,00 1,00 0,00 [°C] Fig. 5: Performance curves, heating ML 353 DC (data for 20 °C indoor temperature) A: Outside temperature 2: Heating capacity in kW 1: COP 3: Power consumption in kW Outside temp.
  • Page 13 Heating capacity ML 523 DC 7,00 6,00 5,00 4,00 3,00 2,00 1,00 0,00 [°C] Fig. 7: Performance curves, heating ML 523 DC (data for 20 °C indoor temperature) A: Outside temperature 2: Heating capacity in kW 1: COP 3: Power consumption in kW Outside temp.

  • Page 14: Design And Function

    Design and function 3.1 Unit description The ML 263 DC-523 DC room air conditioners have a REMKO ML...AT outdoor unit as well as an ML...IT indoor unit. In cooling mode, the outdoor unit serves to output the heat extracted by the indoor unit from the room being cooled.

  • Page 15: Operation

    Operation The indoor unit is easily operated using the Alarms are indicated by a code (see chapter standard infrared remote control. The indoor unit Troubleshooting and customer service). beeps to acknowledge the correct transmission of data. If it is not possible to program the indoor unit with the remote control, then it can also be man- ually operated.
  • Page 16 REMKO ML...DC Keys on the remote control "FAN" key Press this key to set the desired fan speed. 4 speeds are available: Automatic, low, medium and high fan stage. "SLEEP/FRESH" key "SLEEP" key Pressing this key will automatically increase or decrease the target temperature by 1 °C within an...
  • Page 17 "FOLLOW ME" key Indicators on the LCD Pressing this key initiates the "Follow Me" function. The display on the remote control shows the actual temperature of the current location of the remote control. The remote control transmits this signal to the air conditioning unit at intervals of 3 minutes, until the "Follow Me"...
  • Page 18 REMKO ML...DC Key functions "Cooling", "Heating" and "Recirculation" mode A symbol is shown on the display to indicate that Make sure that the indoor unit is connected to the the settings are being transferred. power supply, and is switched on.
  • Page 19 Press the "MODE" key to select "Dehumidifi- Press the "TIMER ON" key. The remote con- cation" mode. trol shows "TIMER ON", the last "Auto on" time setting and the symbol "H" appears on It is not possible to set a temperature here. the display.
  • Page 20 REMKO ML...DC Setting the "Auto off" time Example TIMER function settings Press the "TIMER OFF" key. The remote "TIMER ON" (Auto on mode) control shows "TIMER OFF", the last "Auto The "TIMER ON" function is useful if you want the off"...
  • Page 21 "TIMER ON ð "TIMER OFF" Start (Off ð Start ð Stop) Stop This function is useful if you want the unit to switch on automatically before you wake up, then to Set time 2 hours later 5 hours later after setting after setting switch off again once you have left the house.
  • Page 22 REMKO ML...DC SLEEP function In this function, the unit automatically increases (in cooling mode) or reduces (in heat mode) the tem- perature in the first two hours by 1°C an hour. For the next five hours, the temperature is them kept constant.

  • Page 23: Installation Instructions For Qualified Personnel

    Installation instructions for qualified personnel 5.1 Important notes prior to instal- 5.2 Wall openings lation A wall opening of at least 70mm diameter and 10mm incline from the inside to the outside Transport the unit in its original packaging as must be created.

  • Page 24: Selection Of Installation Location

    REMKO ML...DC 5.4 Selection of installation Wind location If the unit is being installed in windy areas, ensure that the warm outlet air is discharged in the pre- Indoor unit vailing wind direction. If this is not the possible, it...
  • Page 25 Fig. 28: Installation inside buildings K: Cold fresh air W: Warm air 1: Outdoor unit 2: Additional fan 3: Air shaft...

  • Page 26: Minimum Clearances

    Fig. 29: Minimum clearances of the indoor unit and outdoor unit AT: Outdoor unit IT: Indoor unit Air inlet Air outlet Indoor units Outdoor units Dimensions ML 263 DC IT-523 DC IT ML 263 DC AT-523 DC AT (mm) 1500 1700...

  • Page 27: Oil Return Measures

    5.6 Oil return measures Fig. 30: Oil return measures A: Outdoor unit If the outdoor unit is installed at a higher level than B: Indoor unit the indoor unit, suitable oil return measures must 1: One oil pump bend in suction pipe to outdoor be taken.

  • Page 28: Wall Bracket For The Indoor Unit

    REMKO ML...DC 5.8 Wall bracket for the indoor unit Fig. 32: Mounting points for the wall bracket ML 263 DC IT-523 DC IT (front view, all dimensions in mm) Unit type / dimensions ML 263 DC IT-353 DC IT ML 523 DC IT All dimensions in mm.

  • Page 29: Connecting The Refrigerant Piping

    6.2 Connecting the refrigerant The following instructions describe the installation of the cooling cycle and the assembly of the indoor piping unit and the outdoor unit. The refrigerant piping is connected (responsibility The required pipe diameters are given in the of the customer) on the back side of the units.
  • Page 30 REMKO ML...DC Label the refrigerant piping (injection and suc- tion pipes) as well as the associated electrical control lines of each interior unit with a letter. Only connect the lines to their associated con- nections. NOTICE! Always pay attention to the affiliation of the...

  • Page 31: Additional Notes On Connecting The Refrigerant Piping

    6.4 Leak testing Once all the connections have been made, the pressure gauge station is attached to the Schrader valve as follows (if fitted): red = small valve = high pressure blue = large valve = suction pressure Once the connection has been made successfully, the leak test is carried out with dry nitrogen.

  • Page 32: Adding Refrigerant

    5 metres per circuit. Refer to the following chart: Up to and From 5m to incl. 5m max. length ML 263 DC ML 353 DC 0 g/m 30 g/m ML 523 DC CAUTION! Wear protective clothing when handling refrig- erant.
  • Page 33 Safe drainage in the event of leakages For the designations of 1,3,5,8,9 and 11, please refer to the legend for the Fig. 38 The REMKO oil separator OA 2.2 fulfils the fol- lowing list of requirements from regional regula- dimensioning of the strip foundation (in mm) tions and laws.

  • Page 34: Electrical Wiring

    REMKO ML...DC Electrical wiring 8.1 General Information Make the connection as follows: Open the air inlet grill. A protected power supply cable is to be connected to the outdoor unit and a five-wire control line to Remove the covers on the right-hand side the indoor unit respectively.

  • Page 35: Connecting The Outdoor Unit

    Connection ML 263 DC-523 DC L(1) 2(N) S L(1) 2(N) S 230V/1~/50 Hz Fig. 43: Electrical wiring diagram A: Outdoor unit ML 263 DC AT-523 DC AT 1: Power supply B: Indoor unit ML 263 DC IT-523 DC IT 2: Communication line...
  • Page 36 REMKO ML...DC Connecting of optional condensate pump KP 6 / KP 8 L(1) 2(N) S L(1) 2(N) S L N PE Fig. 44: Electrical wiring diagram Outdoor unit Supply condensate pump Indoor unit Fault contact condensate pump Condensate pump KP 6 / KP 8...

  • Page 37: Electrical Drawings

    8.5 Electrical drawings Indoor unit ML 263 DC IT CE-KFR26G/BP3N1Y-11M.D.11.NP2-1 202302130849 CN11 Fig. 45: Electrical drawings A: Connection to terminal block, power supply and 1: Display supply to the indoor unit (contact 1) 2: Probe air inlet B: Connection to terminal block, power supply and...
  • Page 38 REMKO ML...DC Indoor unit ML 353 DC IT CE-KFR26G/BP3N1Y-11M.D.11.NP2-1 202302130860 CN11 Fig. 46: Electrical drawings A: Connection to terminal block, power supply and 1: Display supply to the indoor unit (contact 1) 2: Probe air inlet B: Connection to terminal block, power supply and...
  • Page 39 Indoor unit ML 523 DC IT CE-KFR26G/BP3N1Y-11M.D.11.NP2-1 202302130860 CN11 Fig. 47: Electrical drawings A: Connection to terminal block, power supply and 1: Display supply to the indoor unit (contact 1) 2: Probe air inlet B: Connection to terminal block, power supply and 3: Probe suction pipe supply to the indoor unit (contact L (1)) 4: Swing motor...
  • Page 40 REMKO ML...DC Outdoor unit ML 263 DC AT CN100 CN10 CN14 CN15 CN18 CN19 CN16 CN13 Fig. 48: Electrical drawings A: Connection to terminal block, indoor unit (contact 2: Compressor L(1)) 3: Inductor B: Connection to terminal block, supply (contact S)
  • Page 41 Outdoor unit ML 353 DC AT CE-KFR26W/BP3(PFC).D.13.WP2-1 202302130906 CN10 CN13 CN12 CN15 CN11 CN301 CN302 CN303 Fig. 49: Electrical drawings A: Connection to terminal block, power supply and 2: Heater 1 (optional) supply to the indoor unit (contact L (1)) 3: 4-way valve B: Connection to terminal block, power supply and 4: Condenser fan...
  • Page 42 REMKO ML...DC Outdoor unit ML 523 DC AT CE-KFR26W/BP3(PFC).D.13.WP2-1 202302130906 CN10 CN13 CN12 CN15 CN11 CN301 CN302 CN303 Fig. 50: Electrical drawings A: Connection to terminal block, power supply and 2: Heater 1 (optional) supply to the indoor unit (contact L (1))

  • Page 43: Before Commissioning

    Before commissioning Commissioning After leak testing has been successfully com- pleted, connect the vacuum pump via the pressure NOTICE! gauge station to the valve connections on the out- door unit (see chapter "Leak testing") and create a Commissioning should only be performed by vacuum.
  • Page 44 REMKO ML...DC Function test of the cooling and heating modes Remove the protective caps from the valves. Start the commissioning procedure by briefly opening the shut-off valves on the outdoor unit until the pressure gauge indicates a pressure of approx. 2 bar.

  • Page 45: Troubleshooting, Fault Analysis And Customer Service

    Troubleshooting, fault analysis and customer service 11.1 Troubleshooting and customer service The unit and components are manufactured using state-of-the-art production methods and tested several times to verify their correct function. However, if alarms should occur, please check the functions as detailed in the list below.
  • Page 46 REMKO ML...DC Malfunction Possible causes Checks Remedial measures Filter is dirty / air inlet / Have the filters been Clean the filters outlet opening is blocked cleaned? by debris. Windows and doors Have structural / usage Close windows and open. Heating / cooling...

  • Page 47: Indoor Unit Fault Analysis

    Fault indicated on indoor unit Display Cause Required action EEPROM error Contact specialist dealer Communication fault between outdoor unit and Disconnect from mains for 2 min, check elec- indoor unit trical wiring Wiring fault L/N/Pe/S Check wiring, replace IT circuit board Defective speed monitoring, evaporator fan Check wiring, check motor voltage Evaporator inlet temperature probe defective /...
  • Page 48 REMKO ML...DC Fault E1: Communication error between outdoor and indoor unit Switch the unit off for 5 seconds. Is the fault still shown on the display? Check all connecting lines between the indoor unit and the outdoor unit and check that the connections to the circuit boards comply with the circuit diagram.
  • Page 49 Fault E3: Fan speed incorrect Switch the unit off for 5 seconds. Is the The unit operates normally. fault still shown on the display? Switch the unit off. Check whether the Check the bearing between the fan rotor fan rotor can be and the fan motor.
  • Page 50 REMKO ML...DC Fault EC: No cooling performance or heating performance after 30 minutes Switch the unit off for 5 seconds. Is the fault still shown on the display? Is the indoor unit blowing out cold air or warm Check the probe on the evaporator (T2). Is this...
  • Page 51 Fault P1: Overvoltage/undervoltage protection AT tripped Check whether the power supply is present and Switch the supply and try again as soon as this correct. Is this normal? is normal again. Check all electrical connections. Are they OK? Correct the electrical connections. Check the voltage between the P and N termi- nals of the outdoor unit.
  • Page 52 REMKO ML...DC Resistance values for probes T1, T2, T3 and T4 Temperature (°C) Resistance value 26.9 20.7 16.1 12.6 10.0 (kW) Resistance values for probe T5 Temperature (°C) Resistance value 141.6 56.1 36.6 13.8 (kW) Progression - temperature / resistance T1, T2, T3, T4 Fig.

  • Page 53: Care And Maintenance

    Care and maintenance Maintenance It is recommended that you take out a mainte- Regular care and observation of some basic points nance contract with an annual service from an will ensure trouble-free operation and a long appropriate specialist firm. service life. DANGER! This enables you to ensure the operational reli- Prior to performing any work, ensure the equip-...
  • Page 54 REMKO ML...DC Cleaning the housing Disconnect the power supply to the unit. Open and fold the air inlet grill on the front side upwards. Clean the grill and cover with a soft, damp cloth. Switch the power supply back on.

  • Page 55: Shutdown

    Ensure that units and components are disposed of in accordance with local regulations, e.g. through authorised disposal and recycling specialists or at collection points. REMKO GmbH & Co. KG or your contractual partner will be pleased to provide a list of certified firms in your area.

  • Page 56: Exploded View And Spare Parts Lists

    Exploded view and spare parts lists 14.1 Exploded view - Indoor unit Fig. 55: Exploded view of the unit ML 263 DC IT-523 DC IT We reserve the right to modify the dimensions and design as part of the ongoing technical development process.

  • Page 57: Spare Parts List - Indoor Unit

    14.2 Spare parts list - Indoor unit Please contact REMKO GmbH & Co. KG directly to order spare parts. All of the spare parts numbers for your unit can be found in the download area at www.remko.de. No. Designation ML 263 DC IT ML 353 DC IT ML 523 DC IT...

  • Page 58: Exploded View - Outdoor Unit

    REMKO ML...DC 14.3 Exploded view - Outdoor unit Fig. 56: Exploded view of the unit ML 263 DC AT-523 DC AT We reserve the right to modify the dimensions and design as part of the ongoing technical development process.

  • Page 59: Spare Parts List - Outdoor Unit

    14.4 Spare parts list - Outdoor unit Please contact REMKO GmbH & Co. KG directly to order spare parts. All of the spare parts numbers for your unit can be found in the download area at www.remko.de. No. Designation ML 263 DC AT...

  • Page 60: Index

    REMKO ML...DC Index Alarms Oil return measures ..... . 27 Checks ......45 Ordering spare parts .
  • Page 62 REMKO ML...DC...
  • Page 64 SFlb Customer Service Our equipment operates precisely and reliably. However, in the event of a fault, REMKO customer service is quickly at the scene. Our comprehensive network of experienced dealers always guarantees quick and REMKO GmbH & Co. KG reliable service.

This manual is also suitable for:

Ml 353 dcMl 523 dc

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