Bedienungsanleitung REMKO ML520 (Seite 11 von 24) (Englisch)

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Troubleshooting

This unit has been designed based on state-of-the-art manufacturing methods and it has been tested repeatedly to

ensure that it is working properly. However, should problems occur, refer to the following list.

* *

Before any work on the units is performed, they must be disconnected from the power

supply (fuse or repair switch) and secured against being inadvertently switched on!

Should the unit still not work after performing these functional checks, please contact the closest dealer or

REMKO GmbH & Co KG. directly.

Problem Possible cause Check Remedy

The unit does not start

or it switches itself off

automatically.

Power failure, power too low Are all other electrical components

working?

Check current and wait for the device to start

again

Power fuse / power supply defec-

tive

Are all currents for lighting func-

tional?

Replace power fuse /

Switch on main switch

Power supply line damaged Are all other electrical components

working?

Maintenance by authorised service centre

Amount of time waited after

switching unit on was too short

Did approx. 5 minutes elapse after

restarting?

Plan for longer waiting periods

Operating temperature too low /

too high

Are the fans on the indoor unit and

outdoor unit working?

Pay attention to temperature ranges of in-

door unit and outdoor unit

Excess current caused by thun-

derstorms

Was there recently lightning in the

region ?

Switch the system off and then back on again /

Maintenance by authorised service centre

Problem with the external conden-

sation pump

Did the pump switch off due to a

malfunction?

Check pump and clean if necessary

Sensors that are defective or not

properly attached

Is the indoor unit displaying an er-

ror message?

Maintenance by authorised service centre

The indoor unit is not

responding to the re-

mote control.

Timer set to “ON” Is the timer set? Clear programming and wait for the unit to

start

Polarity of batteries incorrect after

replacement

Is the polarity correct? Insert batteries with the correct polarity

Transmission distance too great /

reception blocked

Is there a transmission signal when

the button is pressed?

Reduce distance to under 7 m and change

location

Remote control defective Does the unit work in manual

mode?

Replace remote control

Too much direct sunlight on the

receiver or transmitter

Does the unit work in the shade? Place the transmitter or receiver in the

shade

Electromagnetic fields are disrupt-

ing transmission

Does the unit work after potential

causes of disruption have been

eliminated?

No signal transmission when sources of dis-

ruption are operated simultaneously

Remote control buttons stuck /

two buttons pressed at once

Does the symbol appear on the

display?

Unstick button / only press one button

Dead batteries in the remote con-

trol

Are the batteries new? Is the dis-

play incomplete?

Insert new batteries

Temperature setting too high Is the selected temperature above

room temperature?

Reduce selected temperature

The device is either

not cooling at all or

only a little bit.

Filter is dirty/ intake / outlet open-

ing is blocked by foreign bodies

Have the filters been cleaned? Clean filters

Windows and doors are opened /

increased amount of warm air or

cold air

Have there been changes in de-

sign or use?

Close the windows and doors / mount addi-

tional systems

Cool mode is not set Does the Cool symbol (COOL)

appear on the display?

Correct the unit settings

Plate fins of the outer unit are

blocked by foreign bodies

Is the fan of the outdoor unit working,

are the plate fin exchangers moving

freely?

Check the fan or winter control mechanism,

reduce air resistance

Cooling cycle is not leak proof Is there a build-up of frost visible

on the plate fin exchangers of the

indoor unit?

Maintenance by authorised service centre

Condensation water is

leaking from the indoor

unit.

The drainage pipe of the conden-

sation collector is blocked / dam-

aged

Can condensation flow freely? Clean the drainage pipe and the condensa-

tion collector

External condensation pump or

float regulator is defective

Is the collector filled with water and

the pump is not working?

Have pump checked by authorised service

centre

Thermal or wind load has in-

creased

Have there been changes in de-

sign or use?

Take corresponding measures to decrease

the thermal or wind load

Heat cannot be expelled Is the fan on the outdoor unit work-

ing?

Check the fan / winter regulation mechanism

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REMKO ML520 Seite 11

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