REMKO RXT***DC Series Operation Manual
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REMKO RXT***DC Series Operation Manual

REMKO RXT***DC Series Operation Manual

Inverter wall/ceiling mounted unit with split design
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REMKO RXT...DC
RXT 351DC, RXT 521DC, RXT 681DC,
RXT 1051DC, RXT 1401DC
Inverter wall/ceiling-mounted unit with split design
Operation · Technology · Spare parts
Edition GB – D01

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Summary of Contents for REMKO RXT***DC Series

  • Page 1 REMKO RXT...DC RXT 351DC, RXT 521DC, RXT 681DC, RXT 1051DC, RXT 1401DC Inverter wall/ceiling-mounted unit with split design Operation · Technology · Spare parts Edition GB – D01...

  • Page 3: Table Of Contents

    These instructions are an integral part of the system and must always be kept in the vicinity of the installation location or on the unit itself This operating manual is a translation of the German original. Made by REMKO Subject to modifications; no liability accepted for errors or misprints!

  • Page 4: Safety Notes

    To preclude any danger from the ■ document included with the unit to unit, take appropriate hazard- REMKO GmbH & Co. KG between Mobile units must be set up prevention measures when ■ the time it was sold and when it...

  • Page 5: Transport And Packaging

    Filter accepted. RXT 521-681 DC System description RXT 351-1401DC room air P S H conditioning units have a REMKO RXT 1051 DC RXT...DC AT outdoor component as well as an RXT...DC IT indoor unit. Filter When in cooling mode, the...

  • Page 6: Operation

    REMKO RXT...DC Operation The indoor unit is easily operated using the standard infrared remote control. The indoor unit beeps to acknowledge the correct transmission of data. If it is not possible to program the indoor unit using the remote control, it can also be operated manually.
  • Page 7 "MODE" key "SLEEP" key Keys on the remote control Use this key to After pressing this key, select the operating mode. The the target temperature in indoor unit has 4 modes: cooling mode automatically increases by 1 °C within one 1.
  • Page 8 REMKO RXT...DC Remote control display Indicator arrows will point to the corresponding settings. Display on the indoor unit Automatic mode Cooling mode Dehumidification mode Fan speed Heating mode Temperature display Key functions A symbol is shown on the display to indicate that the settings are being transferred.
  • Page 9 Using the key, the target temperature can be adjusted up or down by ▲/▼ Keys 1°C. The temperature range lies between 17°C and 30°C ▼ ▲ Cooling mode ▼ ▲ Automatic mode Use the MODE key to select between individual operating modes. MODE Key 5 modes are available: 1.
  • Page 10 REMKO RXT...DC In cooling mode, the air in the room is cooled down to the selected target COOLING mode temperature. The desired room temperature is set with the ▲/▼ keys in 1 °C increments. If the room temperature is 0.5 ℃ above the selected target temperature, then the interior unit starts to cool down the air in the room.
  • Page 11 The fan speed can be adjusted with this key. A selection can be made FAN SPEED Key between low, medium, high and automatic fan speed. Automatic High Medium Speed Speed Speed Speed The oscillating function of the air outlet fins can be adjusted with this key. SWING HORIZONTAL/VERTICAL Key This makes it possible to switch directly between a preset position and the oscillating function.
  • Page 12 REMKO RXT...DC TIMER ON Key Timer On Timer On 3 sec. TIMER OFF Key 3 sec. Timer Off Timer Off Manual air distribution Manual air distribution Fans are located on the air outlet side, which can de individually adjusted using the IR remote control, to regulate the horizontal and vertical distribution of air.

  • Page 13: Decommissioning

    REMKO GmbH & Co. KG or your contractual partner will be pleased to provide a list of certified firms near you. Type of task Checks/Maintenance/ Inspections •...
  • Page 14 REMKO RXT...DC Cleaning the housing 6. When using water, allow Cleaning the condensation the filter to first dry out fully in pump (accessory) 1. Disconnect the power supply to the open air before reinserting the unit. it into the unit.

  • Page 15: Installation Instructions For Qualified Personnel

    Installation instructions for qualified personnel Important notes prior to installation Transport the unit in its original Only open the shut-off valves Only use the union nuts for the ■ ■ ■ packaging as close as possible of the refrigerant pipes after refrigerant pipes included in the to the installation location.

  • Page 16: Installation Materials

    REMKO RXT...DC Wall openings Selection of the installation Wind location A wall opening of at least If the unit is being installed in ■ 70 mm diameter and 10 mm Indoor unit windy areas, ensure that the slope from the inside to the...

  • Page 17: Minimum Clearances

    Installation inside buildings Installation inside buildings Cold Warm air fresh air Ensure that heat can dissipate ■ Additional adequately when placing the outdoor component in cellars, lofts, adjoining rooms or halls Lightwell Lightwell Warm air (Fig. 4). shaft shaft Outdoor component Install an additional fan with ■...

  • Page 18: Installation

    REMKO RXT...DC Important information Seal off open refrigerant pipes Connection variants ■ prior to installation with suitable caps or adhesive The following connection variants strips to avoid the infiltration of can be used for the refrigerant, Observe the manuals for the moisture and never kink or condensate and control lines.

  • Page 19: Unit Installation

    Unit installation 4. Fit the unit such that it is 3. Before flanging the refrigerant attached 5 mm lower in the pipes, ensure that the union nut Wall installation connection area (air intake) is fitted on the pipe. than on the air outlet side! The unit is attached by means of 4.

  • Page 20: Leak Testing

    REMKO RXT...DC Correct flange shape Tightening fittings Once connected, perform a leak test using dry nitrogen. Tighten with 1st Spanner The tightness test involves spraying a leak detection spray Tightening onto the connections. If bubbles torque: are visible, the connections have “...

  • Page 21: Condensate Connection And Safe Drainage

    Condensate connection and safe drainage Installation location 1. Mark the mounting points on Condensate connection the structurally permissible If the temperature falls below the building sections according to dew point, condensation will form Wall installation the dimensions of the ceiling on the finned condenser during bracket.

  • Page 22: Electrical Connection

    REMKO RXT...DC Electrical connection For RXT 351-1401DC units, Make the connection as follows: 2. Connect the unit to the a protected mains supply cable and control cable from the outdoor control cable should be connected 1. The connection terminal block component.

  • Page 23: Electrical Connection Diagram

    Mains cable Mains cable Indoor unit Indoor unit component component Note: The socket A-E under the panel is for connecting a Remko type KFB 2 cabled remote control! Terminals X,Y,E are not assigned! The enclosed fixed resistor is not required...

  • Page 24: Electrical Drawings

    REMKO RXT...DC Electrical drawings RXT 351 DC IT CN 10 CN 6 CN 4 CN 13 CN 3 CN 7 Fan motor CN 12 CN 14 CN 11 Vertical swing motor Horizontal swing CN 1 motor CN 9 CN 2...
  • Page 25 RXT 521DC IT Fan motor CN 20 CN 3 CN 15 CN 4 CN 13 CN 9 Outlet vaporiser sensor CN 7 CN 12 Centre vaporiser sensor CN 11 CN 6 Air circulation sensor Cabled remote control CN 18 CN 7 Socket A-E CN 19 CN 50...
  • Page 26 REMKO RXT...DC RXT 681 DC IT Fan motor CN 20 CN 3 CN 15 CN 4 CN 13 CN 9 Outlet vaporiser sensor CN 7 CN 12 Centre vaporiser sensor CN 11 CN 6 Air circulation sensor Cabled remote CN 18...
  • Page 27 RXT 1051 DC IT Fan motor CN 20 CN 3 CN 15 CN 4 CN 13 CN 9 Outlet vaporiser sensor CN 7 CN 12 Centre vaporiser sensor CN 11 CN 6 Air circulation sensor Cabled remote CN 18 CN 7 control, socket A-E CN 19...
  • Page 28 REMKO RXT...DC RXT 1401 DC IT Fan motor CN 20 CN 3 CN 15 CN 4 CN 13 CN 9 Outlet vaporiser sensor CN 7 CN 12 Centre vaporiser sensor CN 11 CN 6 Air circulation sensor Cabled remote CN 18...

  • Page 29: Before Commissioning

    Before Adding refrigerant Commissioning commissioning The units contain a basic quantity NOTE of refrigerant. For refrigerant line Commissioning should only be After leak testing has been lengths of more than 5 metres performed and documented by successfully completed, connect per circuit, an additional amount specially trained personnel.
  • Page 30 REMKO RXT...DC Check of the surface 5. Use the remote control to 12. Check the overheating, ■ temperature of the suction switch on the unit and select outdoor, indoor, outlet and pipe and check vaporiser is the cooling mode, maximum vaporisation temperatures and not overheating.
  • Page 31 Function test and test run Frequency gauge Air-intake-sensor temperature Display Frequency (Hz) Display Temperature During operation of the system, -7.5 °C operating parameters can be called Standby -5.0°C up on the outdoor component's -2.5°C display. 0°C The following parameters are 2.5°C Operating mode displayed successively:...

  • Page 32: Troubleshooting And Customer Service

    REMKO RXT...DC Troubleshooting and customer service The units and components are manufactured using state-of-the-art production methods and tested several times to verify their correct function. However, if malfunctions should occur, please check the functions as detailed in the list below. Please inform your dealer if the unit is still not working correctly after all function checks have...
  • Page 33 Fault indication by flashing code Opera- Defrost Timer Alarm tion Cause Required action display Flashes Flashes Check that EEPROM is firmly EEPROM error rapidly rapidly in place *Flashes Communication error between OC & Check electrical connection slowly IU PCBs leads Communication error between OC For RXT 1051 DC and up Check wiring...
  • Page 34 REMKO RXT...DC RXT 351 DC indoor unit fault analysis 1. Operation light flashes at 5 Hz: fault on the 2. Defrost light flashes at 5 Hz: fault on the room temperature sensor vaporiser sensor Is the resistance of the Is the resistance of the...
  • Page 35 5. Operation and Timer lights flash at 5 Hz: EEPROM error Is the EEPROM Fit EEPROM properly fitted properly? Replace outdoor component main board 6. Operation light flashes at 5 HZ and Alarm light is on: IPM safety shutdown Check the power Check the power Correct the power supply to the circuit...
  • Page 36 REMKO RXT...DC 7. Operation light flashes at 5 Hz and Timer light is on: 9. Operation, Timer and Alarm lights flash at 5Hz: condenser temperature sensor outdoor component overcurrent protection Connection of sensor Correct Is the input current Reestablish the...
  • Page 37 10. Operation light flashes at 5 Hz and Defrost light is on: Hot gas temperature too high Is the temperature of Is there a Fix the leak and top up the Klixon over 115°C? refrigerant leak? Is the connection Establish a proper between the Klixon and connection circuit board OK?
  • Page 38 REMKO RXT...DC 2. Timer light flashes at 5 Hz: communication error 3. Alarm light flashes at 1Hz: check for fault on between indoor unit and outdoor component condenser temperature sensor or for improper function of outdoor component (for E4, P1 and P2)
  • Page 39 RXT 521-1401DC outdoor component fault analysis Fault displays shown on the outdoor component Fault code Fault description Required action DISPLAY EEPROM error See page 36 / point 1 Communication error between indoor unit and outdoor component See page 36 / point 2 Communication error on outdoor component main board (for RXT 1051 DC and up) See page 37 / point 3 Fault on the outdoor temperature sensor...
  • Page 40 REMKO RXT...DC 3. Fault code E3: communication error on main board 4. Fault code E4: fault on outside temperature of the outdoor component sensor T4 or condenser sensor T3 Does LED1 flash on the Is the condenser Replace Connect condenser...
  • Page 41 6. Fault code P1: high pressure fault Is the connecting cable Correct from the high pressure connection switch to the main board OK? High pressure switch may be defective Bypass the high Replace the high pressure switch on the pressure switch circuit board.
  • Page 42 REMKO RXT...DC 7. Fault code P2: low pressure fault Is the connecting cable Correct from the lower pressure connection switch to the main board OK? Low pressure switch may be defective Bypass the low pressure Replace the high switch on the circuit pressure switch board.
  • Page 43 8. Fault code P3: compressor overcurrent protection has tripped Is the input current greater than 20A? Check refrigerant pipes Is the outdoor Switch off unit temperature too high? Is the function of the Ensure fan functions fan on the outdoor properly component OK? Is the register of the...
  • Page 44 REMKO RXT...DC 9. Fault code P4: hot gas temperature too high Fix the leak and top up Is there a Is the hot gas refrigerant leak? temperature over 115°C? Is the connection Establish a proper between the sensor connection and circuit board OK?
  • Page 45 11. Fault code P6: IPM power board safety shutdown Ensure the correct Is the input voltage Is the voltage range supply voltage between P and N of between P and N of the IPM module 230V the IPM module OK? / the frequency 50 Hz? Are all the electrical Connect cables...
  • Page 46 REMKO RXT...DC Resistances of the temperature sensors (Table 1) Temp. Resistance kΩ Temp. Resistance kΩ (°C) Rmax R(t) Normal Rmin (°C) Rmax R(t) Normal Rmin 116.539 106.732 96.920 11.883 11.496 11.112 110.231 100.552 91.451 11.327 10.971 10.617 103.743 94.769 86.328 10.800...
  • Page 47 Temp. Resistance kΩ (°C) Rmax R(t) Normal Rmin 2.154 2.026 1.903 2.077 1.953 1.833 2.004 1.883 1.766 1.934 1.816 1.702 1.867 1.752 1.641 1.802 1.690 1.582 1.740 1.631 1.525 1.680 1.574 1.471 1.622 1.519 1.419 1.567 1.466 1.369 1.514 1.416 1.321 1.463 1.367...
  • Page 48 REMKO RXT...DC Resistances of the hot gas sensors (Table 2) °C kΩ °C kΩ °C kΩ °C kΩ 542.7 62.73 11.79 3.113 511.9 59.98 11.38 3.025 57.37 10.99 2.941 455.9 54.89 10.61 2.86 430.5 52.53 10.25 2.781 406.7 50.28 9.902 2.704...

  • Page 49: Unit Dimensions

    Unit dimensions RXT 351-1401 DC IT RXT 351DC IT RXT 521DC IT RXT 681DC IT RXT 1051DC AT RXT 1401DC AT 1280 1670 All dimensions are given in mm RXT 351-1401 DC AT RXT 351DC AT RXT 521DC AT RXT 681DC AT RXT 1051DC AT RXT 1401DC AT 1245 All dimensions are given in mm...

  • Page 50: Diagram Of The Unit

    REMKO RXT...DC Exploded view of RXT 351DC IT to RXT 1401DC IT We reserve the right to modify the dimensions and constructional design as part of the ongoing technical-development process. Spare parts list Description RXT 351 DC IT RXT 521 DC IT RXT 681 DC IT RXT 1051 DC IT RXT 1401 DC IT From Series 1034...
  • Page 51 Exploded view of the RXT 351-1401 DC / AT We reserve the right to modify the dimensions and constructional design as part of the ongoing technical-development process. Spare parts list Description RXT 351 DC AT RXT 521 DC AT RXT 681 DC AT RXT 1051 DC AT RXT 1401 DC AT 1034...

  • Page 52: Technical Data

    REMKO RXT...DC Technical data Series RXT 351DC RXT 521DC RXT 681DC RXT 1051DC RXT 1401DC Operating mode Inverter wall-mounted room air conditioner combination for cooling and heating Nominal cooling output 3,51 (1,41-4,02) 5,27 (1,63-5,65) 7,03 (1,63-7,92) 10,55 (3,01-13,22) 14,01 (3,41-15,62)
  • Page 53 Performance charts for heating RXT 351 DC RXT 521 DC RXT 681 DC 8.50 7.00 8.00 6.50 6.00 7.50 5.50 7,00 5,00 6.50 4.50 6.00 4.00 5.50 3.50 5.00 3.00 4.50 1.70 1,40 3.00 1.60 1,20 2.50 1.50 1,00 2.00 1.40 0,80 1.50...

  • Page 54: Ec-Declaration Of Conformity

    D - 32791 Lage Unit (machinery) model: Air conditioner combination with split design Series / Designation: REMKO RXT 351 DC, RXT 521 DC, RXT 681 DC, RXT 1051 DC, RXT 1401 DC Series / Class Number: 1034..., 1035..., 1036..., 1037..., 1038...
  • Page 56 REMKO is a partner that helps you find solutions to your problems. Sales REMKO offers not just a well established sales network both nationally and internationally, but also has exceptionally highly- qualified sales specialists. REMKO field staff are more than just sales representatives;...

This manual is also suitable for:

Rxt 351dcRxt 1401dcRxt 521dcRxt 681dcRxt 1051dcRxtxxxdc series

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