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Troubleshooting and customer service

The equipment and components are manufactured using state-of-the-art production methods and tested several 
times to verify their correct function. 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 the functional checks have 
been performed!

Fault

Possible cause

Checks

Remedial measures

The unit does not start  
or switches itself off

Power outage, undervoltage, 

defective mains fuse / main circuit 

breaker switched off

Are all other electrical installations 

functioning correctly?

Check voltage,  

possible wait until turned on 

again.

Damaged mains cable

Are all other electrical installations 

functioning correctly?

Repair by a certified service centre

Waiting time after switch-on too 

short

Have approx. 5 minutes elapsed 

since the restart?

Plan for longer waiting period 

Temperate outside operating 

temperature range

Are the fans in the indoor unit 

and outside component working 

correctly?

Take into account the temperature 

range for the indoor unit and 

outside component

Overvoltages caused by thunder 

storms

Has there recently been lightning?

Switch off the mains protection 

and switch it back on / have it 

checked by a specialist

Fault in external condensation 

pump

Did the pump shut down due to 

a fault?

Check and if necessary clean the 

pump

The unit does not respond  
to the remote control

Transmission distance too far / 

receiver affected by interference

Does the indoor unit beep when 

pressing a button?

Reduce the distance to less than 6 

m or change position

Defective remote control

Is the unit running in manual 

mode?

Replace the remote control

Receiver or transmitter unit 

exposed to excessive solar 

radiation

Does it function correctly in the 

shade?

Place the receiver & transmitter 

unit in the shade

Electromagnetic fields are 

interfering with transmission

Does it function when 

switching off possible sources of 

interference?

Signal is not transmitted 

when interference sources are 

operational

Button on remote control jammed / 

two buttons pressed at same time

Does the “Send” symbol appear  

on the display?

Release the button / only press 

one button

Batteries in remote control are flat

Have new batteries been inserted? 

Is the display incomplete?

Insert new batteries

The unit is running  
but only provides  
reduced cooling or heating 
performance

Filter is unclean / air inlet / outlet 

blocked by foreign items

Have the filters been cleaned?

Clean the filters

Windows and doors open. 

Heating/cooling output increases

Have there been any 

constructional /  

application-related changes?

Close windows and doors / install 

additional units

Neither cooling nor heating mode 

has been set

Is the cooling/heating symbol 

shown on the display?

Correct the settings for the unit  

 

Fins on outdoor component 

blocked by foreign items

Is the fan on the outdoor 

component running  

and are the fins unobstructed?

Check the fan or winter controller, 

reduce the air resistance

Leaking refrigerant circuit

Are there signs of frost on the fins 

of the indoor unit? 

Repair by specialist

Condensation is leaking out

of the collection container 

drainage pipe Blocked / damaged

Is unrestricted condensation 

discharge ensured?  

Cleaning of drain pipe and 

collector reservoir.  

Faulty external condensation 

pump or float

Is the condensation tray full and 

the pump running?

Call out a specialist to replace the 

pump

Condensation has not drained 

away and has collected in the 

condensation pipe

Is there a steady fall on the 

condensation pipe? Check there is 

no blockage in the pipe.

The condensation pipe must have a  

fall. If necessary, clean the pipe

Condensation does not drain off

Are the condensation pipes 

unblocked and is there a steady 

fall? Are the condensation pump 

and float switch functioning 

correctly?

The condensation pipe must have 

a fall. If necessary, clean the pipe. 

A faulty condensation pump and 

float switch should be replaced.

Malfunction

15

Содержание MD 261

Страница 1: ...Issue GB T11 REMKO MD MD 261 MD 351 Inverter wall room air conditioner in split design Operation Technology Spare parts...

Страница 2: ......

Страница 3: ...ecycling 4 Warranty 4 Transport and packaging 5 Description of the equipment 5 Operation 6 12 Shutdown 13 Care and maintenance 13 14 Troubleshooting and customer service 15 16 Installation instruction...

Страница 4: ...by qualified personnel The setup connection and operation of the unit and its components must be in accordance with the operating conditions stipulated in this manual and comply with all applicable l...

Страница 5: ...ents are met The indoor unit is designed for the upper wall area in the interior It is operated via an infrared remote control The outdoor component consists of a refrigerant circuit with compressor f...

Страница 6: ...also be manually operated Problems are shown in code see chapter Troubleshooting and Customer service CAUTION Immediately replace flat batter ies with a new set otherwise there is a risk of leakage I...

Страница 7: ...TIMER OFF Button This button serves to program the automatic switch off time for the device within the next 24 hours Buttons on the remote control ON OFF Button Press this button to start the unit MO...

Страница 8: ...MODE MODE MODE MODE Hr ON TIMER Hr Off TIMER SET TEMP Auto Turbo Hr ON TIMER Hr Off TIMER SET TEMP Auto Turbo Hr ON TIMER Hr Off TIMER SET TEMP Turbo Hr ON TIMER Hr Off TIMER SET TEMP Turbo Hr ON TIM...

Страница 9: ...only turns the cooling on again after a waiting period of 3 minutes Cooling Mode Hr ON TIMER Hr Off TIMER SET TEMP Turbo COOLING OPERATION Hr ON TIMER Hr Off TIMER SET TEMP Turbo OR Hr ON TIMER Hr Off...

Страница 10: ...erature is set with the buttons in 1 C increments If the room temperature is 1 C below the selected nominal temperature then the indoor unit starts to warm up the air in the room The inverter controll...

Страница 11: ...s by 2 C In heating mode the nominal temperature is decreased after one hour by 1 C and after 2 hours by 2 C The display on the indoor unit goes out With the TURBO function the maximum fan speed can b...

Страница 12: ...ng On Off button The timer display on the indoor unit goes out TIMER button Timer On OFF TIMER ON button activation delay TIMER ON Activation delay TIMER OFF button switch off delay Switch off delay M...

Страница 13: ...quipment using a damp cloth Do not use any caustic abrasive or solvent based cleaning products Do not use a jet of water Clean the fins on the indoor unit and outdoor component prior to long shutdown...

Страница 14: ...Cleaning the filter of the indoor unit 1 Disconnect the supply voltage to the equipment 2 Open the front side of the device by means of folding up the grille and allowing it to engage figure 1 3 Lift...

Страница 15: ...re interfering with transmission Does it function when switching off possible sources of interference Signal is not transmitted when interference sources are operational Button on remote control jamme...

Страница 16: ...connections must be insulated impervious to vapour diffusion If necessary insulate the condensation pipe also Select an installation location which allows air to freely flow through the inlet and out...

Страница 17: ...bracket on the wall or a floor bracket on the ground Minimum clearance to snow 20 cm Snow Windbreak Wind Pipes and cables in wall breakthrough Control cable Condensation pipe Injection pipe Suction p...

Страница 18: ...rom outside preferably using sufficiently large air intakes placed opposite each other Figure 4 Minimum clearances Observe the minimum clearances to allow access for maintenance and repair work and fa...

Страница 19: ...trical cables and condensation pipe to the indoor unit as described below 4 Hang the indoor unit onto the wall bracket by tilting it back slightly and by pressing the bottom part of the unit against t...

Страница 20: ...7 Flanging the refrigerant pipe Refrigerant pipe Deburrer 6 Deburring the refrigerant pipe 8 Correct flange shape Tighten 1 spanner Counter 2 spanner 9 Tighten the fitting Tightening torque 1 4 15 20...

Страница 21: ...nt pipes This always takes at least 60 minutes Once any foreign gases and humidity have been completely extracted from the system the valves on the pressure gauge station are closed and the valves on...

Страница 22: ...ation hose is designed to be installed on the left side view from front 10 Fall of condensation pipe minimum 2 fall When operating the unit at ambient temperatures below 0 C make sure to route the con...

Страница 23: ...standards 3 Terminate the cables as shown on the electrical connection diagram 6 Support the cable in the strain relief and re assemble the unit If an optionally available condensation pump is used o...

Страница 24: ...R W Auto Restart Sensor Vaporiser Display screen Swing motor R S C U V W RY3 4 CN6 CN7 CN5 CN4 CN28 Cn26 N B CN3 CN2 CN1 CN15 CN14 CN16 L2 N A 3 Cn10 Sensor air inlet Sensor Vaporiser Display screen...

Страница 25: ...ity Check that all fastenings mountings etc are firm and at the correct level Before commissioning Note that the employed refrigerant is always filled in liquid form CAUTION NOTE Check the overheating...

Страница 26: ...s described in the chapter Operation Timer temperature setting fan speeds and switching to ventilation or dehumidifying mode 9 Check the correct function of the condensation pipe by pouring distilled...

Страница 27: ...Unit dimensions Dimensional and design changes to advance technical progress are reserved MD 261 IT MD 351 IT 280 815 215 MD 261 AT MD 351 AT 760 590 270 530 290 27...

Страница 28: ...D 261 IT MD 351 IT 1 Complete front face 1109700 1109714 2 Air filter set 1109701 1109715 3 Board display 1109702 1109716 4 Swing motor 1109703 1109717 5 Air outlet fins set 1109704 1109718 6 Condensa...

Страница 29: ...109769 1109786 10 Stop valve injection pipe 1109770 1109787 11 Valve cover 1109771 1109788 12 Reverse flow valve 1109772 1109789 Spare parts not illustrated Control board 1109773 1109790 Condenser com...

Страница 30: ...8 9 52 1 2 12 70 Max operating pressure kPa 4200 4200 Data specific to indoor unit MD 261 IT MD 351 IT Adjustment range room temperature C 17 to 30 Working range C 17 to 32 Air flow rate per stage m...

Страница 31: ...Notes 31...

Страница 32: ...ust advise our clients in the areas of air conditioning and heating technology Customer Service Our equipment is precise and reliable However should a fault should occur REMKO customer service is quic...

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